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1001 lines
37 KiB
1001 lines
37 KiB
#if NET40 || NET461
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using Apewer;
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using Apewer.Source;
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using Externals.MySql.Data.MySqlClient;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.SqlClient;
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using System.Data.OleDb;
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using System.Data.Common;
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using System.Text;
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using System.Windows.Forms;
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using System.Windows.Media.Animation;
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namespace Apewer.Source
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{
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/// <summary></summary>
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public class MySql : IDatabase, IDisposable
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{
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#region fields & properties
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private const string EmptyString = TextUtility.EmptyString;
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private MySqlConnection _connection = null;
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private Timeout _timeout = new Timeout();
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private string _address = EmptyString;
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private string _store = EmptyString;
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private string _user = "root";
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private string _pass = EmptyString;
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/// <summary></summary>
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public string Address { get { return _address; } set { _address = TextUtility.AntiInject(value); } }
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/// <summary></summary>
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public string Store { get { return _store; } set { _store = TextUtility.AntiInject(value); } }
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/// <summary></summary>
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public string User { get { return _user; } set { _user = TextUtility.AntiInject(value); } }
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/// <summary></summary>
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public string Pass { get { return _pass; } set { _pass = TextUtility.AntiInject(value); } }
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/// <summary></summary>
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public Timeout Timeout { get { return _timeout; } set { _timeout = value; } }
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/// <summary></summary>
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public bool Online
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{
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get
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{
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if (_connection == null) return false;
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return _connection.State == ConnectionState.Open;
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}
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}
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/// <summary></summary>
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public MySql() { }
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/// <summary></summary>
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public MySql(string address, string store, string user, string pass = null)
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{
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Address = address;
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Store = store;
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User = user;
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Pass = pass;
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}
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#endregion
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#region methods
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private string CombineString()
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{
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return TextUtility.Merge("server=", _address, "; database=", _store, "; uid=", _user, "; pwd=", _pass, ";");
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}
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/// <summary></summary>
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public bool Connect()
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{
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if (_connection == null)
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{
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_connection = new MySqlConnection();
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_connection.ConnectionString = CombineString();
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}
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else
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{
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if (_connection.State == ConnectionState.Open) return true;
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}
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try
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{
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_connection.Open();
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switch (_connection.State)
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{
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case ConnectionState.Open: return true;
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default: return false;
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}
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}
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catch (Exception)
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{
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Close();
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return false;
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}
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}
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/// <summary></summary>
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public void Close()
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{
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if (_connection != null)
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{
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_connection.Close();
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_connection.Dispose();
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_connection = null;
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}
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}
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/// <summary></summary>
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public void Dispose() { Close(); }
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/// <summary></summary>
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public IQuery Query(string tsql, IEnumerable<IDataParameter> parameters)
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{
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if (tsql.IsBlank()) return Example.InvalidQueryStatement;
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const string table = "queryresult";
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var connected = Connect();
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if (!connected) return Example.InvalidQueryConnection;
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var query = new Query();
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try
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{
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var command = new MySqlCommand();
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command.Connection = _connection;
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command.CommandTimeout = _timeout.Query;
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command.CommandText = tsql;
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if (parameters != null)
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{
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foreach (var parameter in parameters)
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{
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if (parameter == null) continue;
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command.Parameters.Add(parameter);
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}
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}
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using (var ds = new DataSet())
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{
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using (var da = new MySqlDataAdapter(tsql, _connection))
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{
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da.Fill(ds, table);
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query.Table = ds.Tables[table];
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}
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}
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command.Dispose();
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query.Success = true;
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}
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catch (Exception exception)
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{
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query.Success = false;
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query.Exception = exception;
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}
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return query;
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}
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/// <summary></summary>
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public IExecute Execute(string tsql, IEnumerable<IDataParameter> parameters)
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{
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if (tsql.IsBlank()) return Example.InvalidExecuteStatement;
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var connected = Connect();
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if (!connected) return Example.InvalidExecuteConnection;
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var transaction = _connection.BeginTransaction();
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var execute = new Execute();
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try
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{
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var command = new MySqlCommand();
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command.Connection = _connection;
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command.Transaction = transaction;
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command.CommandTimeout = _timeout.Execute;
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command.CommandText = tsql;
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if (parameters != null)
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{
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foreach (var parameter in parameters)
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{
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if (parameter == null) continue;
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command.Parameters.Add(parameter);
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}
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}
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execute.Rows += command.ExecuteNonQuery();
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transaction.Commit();
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command.Dispose();
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execute.Success = true;
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}
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catch (Exception exception)
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{
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try { transaction.Rollback(); } catch { }
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execute.Success = false;
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execute.Exception = exception;
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}
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try { transaction.Dispose(); } catch { }
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return execute;
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}
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/// <summary></summary>
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public IQuery Query(string tsql)
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{
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return Query(tsql, null);
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}
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/// <summary></summary>
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public IExecute Execute(string tsql, IEnumerable<Parameter> parameters)
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{
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var dps = null as List<IDataParameter>;
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if (parameters != null)
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{
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var count = ClassUtility.Count(parameters);
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dps = new List<IDataParameter>(count);
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foreach (var p in parameters)
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{
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var dp = CreateDataParameter(p);
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dps.Add(dp);
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}
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}
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return Execute(tsql, dps);
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}
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/// <summary></summary>
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public IExecute Execute(string tsql)
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{
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return Execute(tsql, null as IEnumerable<IDataParameter>);
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}
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#endregion
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#region linq
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private List<string> QueryFirstColumn(string sql)
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{
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using (var query = Query(sql) as Query) return query.ReadColumn();
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}
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/// <summary></summary>
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public List<string> QueryAllTableNames()
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{
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var sql = TextUtility.Merge("select table_name from information_schema.tables where table_schema='", _store, "' and table_type='base table';");
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return QueryFirstColumn(sql);
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}
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/// <summary></summary>
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public List<string> QueryAllViewNames()
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{
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var sql = TextUtility.Merge("select table_name from information_schema.tables where table_schema='", _store, "' and table_type='view';");
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return QueryFirstColumn(sql);
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}
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/// <summary></summary>
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public List<string> QueryAllColumnNames(string table)
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{
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var sql = TextUtility.Merge("select column_name from information_schema.columns where table_schema='", _store, "' and table_name='", TextUtility.AntiInject(table), "';");
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return QueryFirstColumn(sql);
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}
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/// <summary>获取用于创建表的语句。</summary>
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private string GetCreateStetement(TableStructure structure)
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{
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// 检查现存表。
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var exists = false;
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var tables = QueryAllTableNames();
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if (tables.Count > 0)
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{
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var lower = structure.Table.ToLower();
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foreach (var table in tables)
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{
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if (TextUtility.IsBlank(table)) continue;
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if (table.ToLower() == lower)
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{
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exists = true;
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break;
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}
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}
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}
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if (exists)
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{
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var columns = QueryAllColumnNames(structure.Table);
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if (columns.Count > 0)
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{
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var lower = new List<string>(columns.Count);
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var added = 0;
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foreach (var column in columns)
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{
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if (TextUtility.IsBlank(column)) continue;
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lower.Add(column.ToLower());
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added++;
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}
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lower.Capacity = added;
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columns = lower;
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}
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var sqlsb = new StringBuilder();
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foreach (var column in structure.Columns.Values)
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{
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// 检查 Independent 特性。
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if (structure.Independent && column.Independent) continue;
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// 去重。
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var lower = column.Field.ToLower();
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if (columns.Contains(lower)) continue;
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var type = GetColumnDeclaration(column);
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if (type.IsEmpty()) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
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// alter table `_record` add column `_index` bigint;
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sqlsb.Append("alter table `", structure.Table, "` add column ", type, "; ");
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}
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var sql = sqlsb.ToString();
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return sql;
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}
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else
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{
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// create table _record (`_index` bigint, `_key` varchar(255), `_text` longtext) engine=innodb default charset=utf8mb4
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var columns = new List<string>(structure.Columns.Count);
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var columnsAdded = 0;
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var primarykey = null as string;
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foreach (var kvp in structure.Columns)
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{
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var property = kvp.Key;
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var column = kvp.Value;
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// 检查 Independent 特性。
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if (structure.Independent && column.Independent) continue;
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// 字段。
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var type = GetColumnDeclaration(column);
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if (type.IsEmpty()) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
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columns.Add(type);
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columnsAdded++;
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// 主键。
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if (property == "Key") primarykey = column.Field;
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}
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columns.Capacity = columnsAdded;
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var table = structure.Table;
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var joined = string.Join(", ", columns);
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// 设置主键。
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string sql;
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if (!structure.Independent && !string.IsNullOrEmpty(primarykey))
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{
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sql = TextUtility.Merge("create table `", table, "`(", joined, ", primary key (", primarykey, ") ) engine=innodb default charset=utf8mb4; ");
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}
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else
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{
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sql = TextUtility.Merge("create table `", table, "`(", joined, ") engine=innodb default charset=utf8mb4; ");
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}
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return sql;
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}
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}
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/// <summary></summary>
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private string CreateTable(Type model, out string sql)
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{
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if (model == null)
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{
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sql = "";
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return "指定的类型无效。";
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}
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var structure = null as TableStructure;
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try { structure = TableStructure.ParseModel(model); }
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catch (Exception exception)
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{
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sql = "";
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return exception.Message;
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}
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// 连接数据库。
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if (!Connect())
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{
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sql = "";
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return "连接数据库失败。";
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}
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sql = GetCreateStetement(structure);
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if (sql.NotEmpty())
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{
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var execute = Execute(sql);
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if (!execute.Success) return execute.Error;
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}
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return null;
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}
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/// <summary></summary>
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public string CreateTable(Type model)
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{
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return CreateTable(model, out string sql);
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}
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/// <summary></summary>
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public string CreateTable<T>() where T : Record
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{
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return CreateTable(typeof(T));
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}
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/// <summary></summary>
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public string CreateTable(Record model)
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{
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if (model == null) return "参数无效。";
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return CreateTable(model.GetType());
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}
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/// <summary>插入记录。成功时候返回空字符串,发生异常时返回异常信息。</summary>
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public string Insert(Record entity, bool resetKey = false)
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{
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if (entity == null) return "参数无效。";
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entity.FixProperties();
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if (resetKey) Record.ResetKey(entity);
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var structure = null as TableStructure;
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try { structure = TableStructure.ParseModel(entity); }
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catch (Exception exception) { return exception.Message; }
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var parameters = structure.CreateDataParameters(entity, CreateDataParameter);
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var sql = GenerateInsertStatement(structure.Table, parameters);
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var execute = Execute(sql, parameters);
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if (execute.Success) return TextUtility.EmptyString;
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return execute.Error;
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}
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/// <summary>
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/// <para>更新记录,实体中的 Created 和 Key 属性不被更新。成功时返回空字符串,发生异常时返回异常信息。</para>
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/// <para>无法更新拥有 Independent 特性的模型。</para>
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/// </summary>
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public string Update(Record entity)
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{
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if (entity == null) return "参数无效。";
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entity.FixProperties();
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entity.Updated = ClockUtility.Lucid;
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var structure = null as TableStructure;
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try { structure = TableStructure.ParseModel(entity); }
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catch (Exception exception) { return exception.Message; }
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// 检查 Independent 特性。
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if (structure.Independent) return "无法更新拥有 Independent 特性的模型。";
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var parameters = structure.CreateDataParameters(entity, CreateDataParameter, "_created", "_key");
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var sql = GenerateUpdateStatement(structure, entity.Key, parameters);
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var execute = Execute(sql, parameters);
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if (execute.Success) return TextUtility.EmptyString;
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return execute.Error;
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}
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/// <summary></summary>
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public Result<List<T>> QueryRecords<T>(string tsql) where T : Record
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{
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if (tsql.IsEmpty()) return new Result<List<T>>(new ArgumentException());
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try
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{
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// 解析模型,抛出 Exception。
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TableStructure.ParseModel(typeof(T));
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var query = Query(tsql) as Query;
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var list = query.Fill<T>();
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query.Dispose();
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return new Result<List<T>>(list);
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}
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catch (Exception exception)
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{
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return new Result<List<T>>(exception);
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}
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}
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/// <summary>获取记录。</summary>
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public Result<T> QueryRecord<T>(string key, long flag = 0) where T : Record
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{
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var k = TextUtility.RestrictGuid(key);
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if (k.IsEmpty()) new Result<T>(new Exception("参数无效。"));
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try
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{
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var structure = TableStructure.ParseModel(typeof(T));
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var sqlflag = (flag == 0) ? TextUtility.EmptyString : TextUtility.Merge(" `_flag`=", flag.ToString(), " and");
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var sqlkey = TextUtility.Merge(" `_key`='", k, "'");
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var sql = TextUtility.Merge("select * from `", structure.Table, "` where ", sqlflag, sqlkey, " limit 1;");
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var result = QueryRecords<T>(sql);
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var list = result.Entity;
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if (list != null && list.Count > 0) return new Result<T>(list[0]);
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return new Result<T>(null, "无结果。");
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}
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catch (Exception exception)
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{
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return new Result<T>(exception);
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}
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}
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/// <summary>获取所有记录。Flag 为 0 时将忽略 Flag 条件。</summary>
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public Result<List<T>> QueryRecords<T>(long flag = 0) where T : Record
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{
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try
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{
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var structure = TableStructure.ParseModel(typeof(T));
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var sqlflag = (flag == 0) ? TextUtility.EmptyString : TextUtility.Merge(" where `_flag`=", flag.ToString());
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var sql = TextUtility.Merge("select * from `", structure.Table, "`", sqlflag, "; ");
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return QueryRecords<T>(sql);
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}
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catch (Exception exception)
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{
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return new Result<List<T>>(exception);
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}
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}
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/// <summary>获取记录。</summary>
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/// <param name="skip">要跳过的记录数,可用最小值为 0。</param>
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/// <param name="count">要获取的记录数,可用最小值为 1。</param>
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public Result<List<T>> QueryRecords<T>(int skip, int count) where T : Record
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{
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try
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{
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if (skip < 0) return new Result<List<T>>(new ArgumentOutOfRangeException(nameof(skip)));
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if (count < 1) return new Result<List<T>>(new ArgumentOutOfRangeException(nameof(count)));
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var tableName = TableStructure.ParseTable(typeof(T)).Name;
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var sql = $"select * from `{tableName}` where _flag = 1 limit {skip}, {count}; ";
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return QueryRecords<T>(sql);
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}
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catch (Exception exception)
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{
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return new Result<List<T>>(exception);
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}
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}
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/// <summary>查询有效的 Key 值。</summary>
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public Result<List<string>> QueryKeys(Type model, long flag = 0)
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{
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if (model != null)
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{
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try
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{
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var type = model;
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var ts = TableStructure.ParseModel(type);
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var sqlflag = (flag == 0) ? TextUtility.EmptyString : TextUtility.Merge(" where `_flag`=", flag.ToString());
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var sql = TextUtility.Merge("select `_key` from `", ts.Table, "`", sqlflag, "; ");
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using (var query = Query(sql) as Query)
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{
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var list = query.ReadColumn((r) => TextUtility.Trim(query.Text(r, 0)));
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return new Result<List<string>>(list);
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}
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}
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catch (Exception argException)
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{
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return new Result<List<string>>(argException);
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}
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}
|
|
return new Result<List<string>>(new Exception("参数无效。"));
|
|
}
|
|
|
|
/// <summary>查询有效的 Key 值。</summary>
|
|
public Result<List<string>> QueryKeys<T>(long flag = 0) where T : Record
|
|
{
|
|
try
|
|
{
|
|
var type = typeof(T);
|
|
|
|
var ts = TableStructure.ParseModel(type);
|
|
var sqlflag = (flag == 0) ? TextUtility.EmptyString : TextUtility.Merge(" where _flag=", flag.ToString());
|
|
var sql = TextUtility.Merge("select `_key` from `", ts.Table, "`", sqlflag, "; ");
|
|
using (var query = Query(sql) as Query)
|
|
{
|
|
var list = query.ReadColumn((r) => TextUtility.Trim(query.Text(r, 0)));
|
|
return new Result<List<string>>(list);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
return new Result<List<string>>(ex);
|
|
}
|
|
}
|
|
|
|
/// <summary>对表添加列,返回错误信息。</summary>
|
|
/// <typeparam name="T">记录类型。</typeparam>
|
|
/// <param name="column">列名称。</param>
|
|
/// <param name="type">字段类型。</param>
|
|
/// <param name="length">字段长度,仅对 VarChar 和 NVarChar 类型有效。</param>
|
|
/// <returns></returns>
|
|
public string AddColumn<T>(string column, ColumnType type, int length = 0) where T : Record
|
|
{
|
|
var columnName = SafeColumn(column);
|
|
if (columnName.IsEmpty()) return "列名无效。";
|
|
|
|
var tableName = TableStructure.ParseTable(typeof(T)).Name;
|
|
|
|
var columeType = "";
|
|
switch (type)
|
|
{
|
|
case ColumnType.Integer:
|
|
columeType = "bigint";
|
|
break;
|
|
case ColumnType.Float:
|
|
columeType = "double";
|
|
break;
|
|
case ColumnType.Binary:
|
|
columeType = "longblob";
|
|
break;
|
|
case ColumnType.DateTime:
|
|
columeType = "datetime";
|
|
break;
|
|
case ColumnType.VarChar:
|
|
case ColumnType.NVarChar:
|
|
columeType = $"varchar({length})";
|
|
break;
|
|
case ColumnType.VarChar255:
|
|
case ColumnType.NVarChar255:
|
|
columeType = "varchar(255)";
|
|
break;
|
|
case ColumnType.VarCharMax:
|
|
case ColumnType.NVarCharMax:
|
|
columeType = "varchar(max)";
|
|
break;
|
|
case ColumnType.Text:
|
|
columeType = "longtext";
|
|
break;
|
|
}
|
|
if (columeType.IsEmpty()) return "类型不支持。";
|
|
|
|
var sql = $"alter table `{tableName}` add {columnName} {columeType}; ";
|
|
var execute = Execute(sql) as Execute;
|
|
var error = execute.Error;
|
|
return error;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region static
|
|
|
|
/// <summary>对文本转义,符合 SQL 安全性。可根据字段类型限制 UTF-8 字节数,默认为 0 时不限制字节数。</summary>
|
|
public static string Escape(string text, int bytes = 0)
|
|
{
|
|
if (text.IsEmpty()) return "";
|
|
|
|
var t = text ?? "";
|
|
t = t.Replace("\\", "\\\\");
|
|
t = t.Replace("'", "\\'");
|
|
t = t.Replace("\n", "\\n");
|
|
t = t.Replace("\r", "\\r");
|
|
t = t.Replace("\b", "\\b");
|
|
t = t.Replace("\t", "\\t");
|
|
t = t.Replace("\f", "\\f");
|
|
|
|
if (bytes > 5)
|
|
{
|
|
if (t.GetBytes(Encoding.UTF8).Length > bytes)
|
|
{
|
|
while (true)
|
|
{
|
|
t = t.Substring(0, t.Length - 1);
|
|
if (t.GetBytes(Encoding.UTF8).Length <= (bytes - 4)) break;
|
|
}
|
|
t = t + " ...";
|
|
}
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
/// <summary></summary>
|
|
public static string SafeTable(string table)
|
|
{
|
|
const string chars = "0123456789_-ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
|
|
var safety = TextUtility.RestrictCharacters(table, chars).SafeLower();
|
|
var pc = 0;
|
|
for (var i = 0; i < safety.Length; i++)
|
|
{
|
|
if (safety[i] == '-') pc += 1;
|
|
else break;
|
|
}
|
|
if (pc == safety.Length) return "";
|
|
if (pc > 0) safety = safety.Substring(pc);
|
|
return safety;
|
|
}
|
|
|
|
/// <summary></summary>
|
|
public static string SafeColumn(string column) => SafeTable(column);
|
|
|
|
/// <summary></summary>
|
|
/// <exception cref="ArgumentNullException"></exception>
|
|
/// <exception cref="InvalidOperationException"></exception>
|
|
internal static MySqlParameter CreateDataParameter(Parameter parameter)
|
|
{
|
|
if (parameter == null) throw new InvalidOperationException("参数无效。");
|
|
return CreateDataParameter(parameter.Name, parameter.Type, parameter.Size, parameter.Value);
|
|
}
|
|
|
|
/// <summary></summary>
|
|
internal static MySqlParameter CreateDataParameter(string name, ColumnType type, Int32 size, object value)
|
|
{
|
|
if (TextUtility.IsBlank(name)) return null;
|
|
|
|
var dbtype = MySqlDbType.Int64;
|
|
switch (type)
|
|
{
|
|
case ColumnType.Binary:
|
|
dbtype = MySqlDbType.LongBlob;
|
|
break;
|
|
case ColumnType.Integer:
|
|
dbtype = MySqlDbType.Int64;
|
|
break;
|
|
case ColumnType.Float:
|
|
dbtype = MySqlDbType.Double;
|
|
break;
|
|
case ColumnType.DateTime:
|
|
dbtype = MySqlDbType.DateTime;
|
|
break;
|
|
case ColumnType.VarChar:
|
|
case ColumnType.VarChar255:
|
|
case ColumnType.VarCharMax:
|
|
case ColumnType.NVarChar:
|
|
case ColumnType.NVarChar255:
|
|
case ColumnType.NVarCharMax:
|
|
dbtype = MySqlDbType.VarChar;
|
|
break;
|
|
case ColumnType.Text:
|
|
case ColumnType.NText:
|
|
dbtype = MySqlDbType.LongText;
|
|
break;
|
|
default:
|
|
throw new InvalidOperationException(TextUtility.Merge("类型 ", type.ToString(), " 不受支持。"));
|
|
}
|
|
|
|
switch (type)
|
|
{
|
|
case ColumnType.VarChar:
|
|
case ColumnType.NVarChar:
|
|
size = NumberUtility.RestrictValue(size, 0, 65535);
|
|
break;
|
|
case ColumnType.VarChar255:
|
|
case ColumnType.NVarChar255:
|
|
size = NumberUtility.RestrictValue(size, 0, 255);
|
|
break;
|
|
default:
|
|
size = 0;
|
|
break;
|
|
}
|
|
|
|
if (value is string && value != null && size > 0)
|
|
{
|
|
value = TextUtility.RestrictLength((string)value, size);
|
|
}
|
|
|
|
var parameter = new MySqlParameter();
|
|
parameter.ParameterName = name;
|
|
parameter.MySqlDbType = dbtype;
|
|
parameter.Value = value;
|
|
if (size > 0) parameter.Size = size;
|
|
return parameter;
|
|
}
|
|
|
|
/// <summary></summary>
|
|
internal static MySqlParameter CreateDataParameter(string name, MySqlDbType type, object value, Int32 size = 0)
|
|
{
|
|
var parameter = new MySqlParameter();
|
|
parameter.ParameterName = name;
|
|
parameter.MySqlDbType = type;
|
|
parameter.Value = value;
|
|
if (size > 0) parameter.Size = size;
|
|
return parameter;
|
|
}
|
|
|
|
private static string GetColumnDeclaration(ColumnAttribute column)
|
|
{
|
|
var type = TextUtility.EmptyString;
|
|
var length = Math.Max(0, (int)column.Length);
|
|
switch (column.Type)
|
|
{
|
|
case ColumnType.Integer:
|
|
type = "bigint";
|
|
break;
|
|
case ColumnType.Float:
|
|
type = "double";
|
|
break;
|
|
case ColumnType.Binary:
|
|
type = "longblob";
|
|
break;
|
|
case ColumnType.DateTime:
|
|
type = "datetime";
|
|
break;
|
|
case ColumnType.VarChar:
|
|
type = TextUtility.Merge("varchar(", Math.Max(65535, length).ToString(), ")");
|
|
break;
|
|
case ColumnType.VarChar255:
|
|
type = TextUtility.Merge("varchar(255)");
|
|
break;
|
|
case ColumnType.VarCharMax:
|
|
type = TextUtility.Merge("varchar(max)");
|
|
break;
|
|
case ColumnType.Text:
|
|
type = TextUtility.Merge("longtext");
|
|
break;
|
|
case ColumnType.NVarChar:
|
|
type = TextUtility.Merge("varchar(", Math.Min(65535, length).ToString(), ")");
|
|
break;
|
|
case ColumnType.NVarChar255:
|
|
type = TextUtility.Merge("varchar(255)");
|
|
break;
|
|
case ColumnType.NVarCharMax:
|
|
type = TextUtility.Merge("varchar(65535)");
|
|
break;
|
|
case ColumnType.NText:
|
|
type = TextUtility.Merge("longtext");
|
|
break;
|
|
default:
|
|
return TextUtility.EmptyString;
|
|
}
|
|
return TextUtility.Merge("`", (string)column.Field, "` ", type);
|
|
}
|
|
|
|
private static string GetParameterName(string argParameter)
|
|
{
|
|
var name = TextUtility.AntiInject(argParameter, 255);
|
|
if (name.StartsWith("@") && name.Length > 1)
|
|
{
|
|
name = name.Substring(1, name.Length - 1);
|
|
}
|
|
return name;
|
|
}
|
|
|
|
private static string GetParameterName(IDataParameter argParameter)
|
|
{
|
|
var name = TextUtility.EmptyString;
|
|
if (argParameter != null)
|
|
{
|
|
name = GetParameterName(argParameter.ParameterName);
|
|
}
|
|
return name;
|
|
}
|
|
|
|
private static List<string> GetParametersNames(IEnumerable<IDataParameter> argParameters)
|
|
{
|
|
var columns = new List<string>();
|
|
if (argParameters != null)
|
|
{
|
|
columns.Capacity = ClassUtility.Count(argParameters);
|
|
var columnsAdded = 0;
|
|
foreach (var parameter in argParameters)
|
|
{
|
|
var name = GetParameterName(parameter);
|
|
var isblank = TextUtility.IsBlank(name);
|
|
if (isblank) continue;
|
|
columns.Add(name);
|
|
columnsAdded++;
|
|
}
|
|
columns.Capacity = columnsAdded;
|
|
}
|
|
return columns;
|
|
}
|
|
|
|
private static string GenerateInsertStatement(string table, List<string> columns)
|
|
{
|
|
var sql = TextUtility.EmptyString;
|
|
var tn = TextUtility.AntiInject(table, 255);
|
|
if (columns != null && !TextUtility.IsBlank(tn))
|
|
{
|
|
var count = columns.Count;
|
|
var names = new List<string>(count);
|
|
var values = new List<string>(count);
|
|
foreach (var column in columns)
|
|
{
|
|
if (string.IsNullOrEmpty(column)) continue;
|
|
names.Add($"`{column}`");
|
|
values.Add($"@{column}");
|
|
}
|
|
|
|
var ns = string.Join(", ", names);
|
|
var vs = string.Join(", ", values);
|
|
|
|
sql = $"insert into `{tn}` ({ns}) values ({vs}); ";
|
|
|
|
// var sb = new StringBuilder();
|
|
// if (columns.Count > 0)
|
|
// {
|
|
// sb.Append("insert into `");
|
|
// sb.Append(tn);
|
|
// sb.Append("` (");
|
|
// for (var i = 0; i < columns.Count; i++)
|
|
// {
|
|
// if (i > 0) sb.Append(", ");
|
|
// sb.Append("`");
|
|
// sb.Append(columns[i]);
|
|
// sb.Append("`");
|
|
// }
|
|
// sb.Append(") values (");
|
|
// for (var i = 0; i < columns.Count; i++)
|
|
// {
|
|
// if (i > 0) sb.Append(", ");
|
|
// sb.Append("@");
|
|
// sb.Append(columns[i]);
|
|
// }
|
|
// sb.Append("); ");
|
|
// }
|
|
// sql = sb.ToString();
|
|
}
|
|
return sql;
|
|
}
|
|
|
|
private static string GenerateUpdateStatement(TableStructure structure, string key, List<string> columns)
|
|
{
|
|
var result = TextUtility.EmptyString;
|
|
|
|
var table = TextUtility.AntiInject(structure.Table, 255);
|
|
if (TextUtility.IsEmpty(table)) return result;
|
|
|
|
var safekey = TextUtility.AntiInject(key, 255);
|
|
if (TextUtility.IsEmpty(safekey)) return result;
|
|
|
|
var count = columns == null ? -1 : columns.Count;
|
|
if (count < 1) return result;
|
|
|
|
var items = new List<string>(count);
|
|
foreach (var column in columns)
|
|
{
|
|
items.Add(TextUtility.Merge("`", column, "`=@", column));
|
|
}
|
|
result = TextUtility.Merge("update `", table, "` set ", string.Join(", ", items), " where `_key`='", safekey, "'; ");
|
|
return result;
|
|
}
|
|
|
|
/// <summary>生成 INSERT INTO 语句。表名必须有效,无有效参数时将获取空结果。</summary>
|
|
/// <exception cref="System.ArgumentException"></exception>
|
|
/// <exception cref="System.ArgumentNullException"></exception>
|
|
public static string GenerateInsertStatement(string argTable, IEnumerable<IDataParameter> parameters)
|
|
{
|
|
if (argTable == null) throw new ArgumentNullException("argTable");
|
|
var table = TextUtility.AntiInject(argTable, 255);
|
|
if (TextUtility.IsBlank(table)) throw new ArgumentException("表名无效。", "argTable");
|
|
|
|
var columns = GetParametersNames(parameters);
|
|
if (columns.Count < 1) return TextUtility.EmptyString;
|
|
|
|
return GenerateInsertStatement(table, columns);
|
|
}
|
|
|
|
/// <summary>生成 UPDATE 语句,键字段名为“_key”。表名必须有效,键值必须有效,无有效参数时将获取空结果。</summary>
|
|
/// <exception cref="System.ArgumentException"></exception>
|
|
/// <exception cref="System.ArgumentNullException"></exception>
|
|
public static string GenerateUpdateStatement(TableStructure structure, string key, IEnumerable<IDataParameter> parameters)
|
|
{
|
|
if (structure == null) throw new ArgumentNullException("structure");
|
|
if (key == null) throw new ArgumentNullException("key");
|
|
|
|
var table = TextUtility.AntiInject(structure.Table, 255);
|
|
if (TextUtility.IsBlank(table)) throw new ArgumentException("表名无效。", "structure");
|
|
|
|
var safekey = TextUtility.AntiInject(key, 255);
|
|
if (TextUtility.IsBlank(safekey)) throw new ArgumentException("键值无效。", "key");
|
|
|
|
var columns = GetParametersNames(parameters);
|
|
if (columns.Count < 1) return TextUtility.EmptyString;
|
|
|
|
return GenerateUpdateStatement(structure, safekey, columns);
|
|
}
|
|
|
|
/// <summary>获取每个数据库中,每个表的容量,单位为字节。</summary>
|
|
public static Dictionary<string, Dictionary<string, long>> GetTablesCapacity(MySql source)
|
|
{
|
|
var result = new Dictionary<string, Dictionary<string, long>>();
|
|
if (source != null && source.Connect())
|
|
{
|
|
var sql = "select `table_schema`, `table_name`, `engine`, `data_length`, `index_length` from `information_schema`.tables order by `table_schema`, `table_name`";
|
|
using (var query = (Query)source.Query(sql))
|
|
{
|
|
for (var r = 0; r < query.Rows; r++)
|
|
{
|
|
var store = query.Text(r, "table_schema");
|
|
var table = query.Text(r, "table_name");
|
|
var engine = query.Text(r, "engine");
|
|
var capacity = TextUtility.GetInt64(query.Text(r, "data_length")) + TextUtility.GetInt64(query.Text(r, "index_length"));
|
|
|
|
if (store == "mysql") continue;
|
|
if (store == "information_schema") continue;
|
|
if (store == "performance_schema") continue;
|
|
|
|
if (engine != "MyISAM" && engine != "InnoDB") continue;
|
|
|
|
if (!result.ContainsKey(store)) result.Add(store, new Dictionary<string, long>());
|
|
if (!result[store].ContainsKey(table)) result[store].Add(table, 0L);
|
|
result[store][table] = capacity;
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endregion
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|