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816 lines
30 KiB
816 lines
30 KiB
/* 2021.11.07 */
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using Apewer;
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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.Common;
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using System.Text;
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using static Apewer.Source.OrmHelper;
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using System.Data.SqlClient;
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#if NETFRAMEWORK
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using System.Data.Sql;
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#endif
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namespace Apewer.Source
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{
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/// <summary></summary>
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[Serializable]
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public class SqlClient : IDbClient
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{
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#region 变量、构造函数
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private Timeout _timeout = null;
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private string _connectionstring = "";
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/// <summary>获取或设置日志记录。</summary>
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public Logger Logger { get; set; }
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/// <summary>超时设定。</summary>
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public Timeout Timeout { get => _timeout; }
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/// <summary>使用连接字符串创建数据库连接实例。</summary>
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public SqlClient(string connectionString, Timeout timeout = null)
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{
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_timeout = timeout ?? Timeout.Default;
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_connectionstring = connectionString ?? "";
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}
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/// <summary>使用连接凭据创建数据库连接实例。</summary>
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public SqlClient(string address, string store, string user, string pass, Timeout timeout = null)
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{
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if (timeout == null) timeout = Timeout.Default;
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var a = address ?? "";
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var s = store ?? "";
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var u = user ?? "";
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var p = pass ?? "";
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var cs = $"data source = {a}; initial catalog = {s}; ";
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if (string.IsNullOrEmpty(u)) cs += "integrated security = sspi; ";
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else
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{
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cs += $"user id = {u}; ";
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if (!string.IsNullOrEmpty(p)) cs += $"password = {p}; ";
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}
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cs += $"connection timeout = {timeout.Connect}; ";
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_timeout = timeout ?? Timeout.Default;
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_connectionstring = cs;
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}
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#endregion
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#region Ado - Connection
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private SqlConnection _db = null;
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/// <summary>连接字符串。</summary>
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public string ConnectionString { get => _connectionstring; }
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/// <summary>获取当前的 SqlConnection 对象。</summary>
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public IDbConnection Connection { get => _db; }
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/// <summary>数据库是否已经连接。</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 (_db == null) return false;
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return (_db.State == ConnectionState.Open);
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}
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}
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/// <summary>连接数据库,若未连接则尝试连接,获取连接成功的状态。</summary>
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public string Connect()
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{
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if (_db == null)
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{
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_db = new SqlConnection();
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_db.ConnectionString = _connectionstring;
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}
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else
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{
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if (_db.State == ConnectionState.Open) return null;
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}
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try
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{
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_db.Open();
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switch (_db.State)
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{
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case ConnectionState.Open: return null;
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default: return $"连接失败,当前处于 {_db.State} 状态。";
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}
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}
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catch (Exception ex)
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{
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Logger.Error(nameof(SqlClient), "Connection", ex, _db.ConnectionString);
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Close();
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return ex.Message;
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}
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}
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/// <summary>关闭连接,并释放对象所占用的系统资源。</summary>
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public void Close()
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{
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if (_db != null)
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{
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if (_transaction != null)
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{
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if (_autocommit) Commit();
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else Rollback();
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}
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_db.Close();
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_db.Dispose();
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_db = null;
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}
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}
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/// <summary>关闭连接,释放对象所占用的系统资源,并清除连接信息。</summary>
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public void Dispose() => Close();
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#endregion
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#region Ado - Transaction
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private IDbTransaction _transaction = null;
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private bool _autocommit = false;
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/// <summary>启动事务。</summary>
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public string Begin(bool commit = true) => Begin(commit, null);
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/// <summary>启动事务。</summary>
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public string Begin(bool commit, Class<IsolationLevel> isolation)
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{
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var connect = Connect();
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if (connect.NotEmpty()) return connect;
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if (_transaction != null) return "存在已启动的事务,无法再次启动。";
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try
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{
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_transaction = isolation ? _db.BeginTransaction(isolation.Value) : _db.BeginTransaction();
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_autocommit = commit;
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return null;
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}
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catch (Exception ex)
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{
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Logger.Error(nameof(SqlClient), "Begin", ex.Message());
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return ex.Message();
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}
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}
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/// <summary>提交事务。</summary>
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public string Commit()
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{
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if (_transaction == null) return "事务不存在。";
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try
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{
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_transaction.Commit();
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RuntimeUtility.Dispose(_transaction);
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_transaction = null;
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return null;
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}
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catch (Exception ex)
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{
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RuntimeUtility.Dispose(_transaction);
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_transaction = null;
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Logger.Error(nameof(SqlClient), "Commit", ex.Message());
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return ex.Message();
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}
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}
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/// <summary>从挂起状态回滚事务。</summary>
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public string Rollback()
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{
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if (_transaction == null) return "事务不存在。";
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try
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{
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_transaction.Rollback();
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RuntimeUtility.Dispose(_transaction);
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_transaction = null;
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return null;
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}
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catch (Exception ex)
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{
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RuntimeUtility.Dispose(_transaction);
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_transaction = null;
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Logger.Error(nameof(SqlClient), "Rollback", ex.Message);
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return ex.Message();
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}
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}
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#endregion
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#region Ado - SQL
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/// <summary>查询。</summary>
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public IQuery Query(string sql) => Query(sql, null);
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/// <summary>查询。</summary>
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public IQuery Query(string sql, IEnumerable<IDataParameter> parameters)
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{
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if (TextUtility.IsBlank(sql)) return Example.InvalidQueryStatement;
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var connected = Connect();
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if (connected.NotEmpty()) return new Query(false, connected);
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try
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{
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using (var adapter = new SqlDataAdapter())
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{
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var command = adapter.SelectCommand;
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command.Connection = _db;
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command.CommandTimeout = _timeout.Query;
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command.CommandText = sql;
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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) 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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var srcTable = "table_" + Guid.NewGuid().ToString("n");
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adapter.Fill(ds, srcTable);
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var table = ds.Tables[srcTable];
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return new Query(table, true);
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}
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}
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}
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catch (Exception exception)
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{
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Logger.Error(nameof(SqlClient), "Query", exception, sql);
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return new Query(exception);
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}
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}
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/// <summary>执行。</summary>
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public IExecute Execute(string sql) => Execute(sql, null);
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/// <summary>执行单条 Transact-SQL 语句,并加入参数。</summary>
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public IExecute Execute(string sql, IEnumerable<IDataParameter> parameters)
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{
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if (TextUtility.IsBlank(sql)) return Example.InvalidExecuteStatement;
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var connected = Connect();
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if (connected.NotEmpty()) return new Execute(false, connected);
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var inTransaction = _transaction != null;
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if (!inTransaction) Begin();
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try
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{
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using (var command = new SqlCommand())
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{
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command.Connection = _db;
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command.Transaction = (SqlTransaction)_transaction;
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command.CommandTimeout = _timeout.Execute;
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command.CommandText = sql;
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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) command.Parameters.Add(parameter);
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}
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}
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var rows = command.ExecuteNonQuery();
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if (!inTransaction) Commit(); // todo 此处应该检查事务提交产生的错误。
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return new Execute(true, rows);
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}
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}
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catch (Exception exception)
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{
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Logger.Error(nameof(SqlClient), "Execute", exception, sql);
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if (!inTransaction) Rollback();
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return new Execute(exception);
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}
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}
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#endregion
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#region ORM
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/// <summary>查询数据库中的所有表名。</summary>
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public string[] TableNames()
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{
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var list = new List<string>();
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if (Connect().IsEmpty())
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{
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var sql = "select [name] from [sysobjects] where [type] = 'u' order by [name]; ";
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var query = (Query)Query(sql);
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for (int r = 0; r < query.Rows; r++)
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{
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var cell = query.Text(r, 0);
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if (TextUtility.IsBlank(cell)) continue;
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list.Add(cell);
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}
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query.Dispose();
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}
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return list.ToArray();
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}
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/// <summary>查询数据库实例中的所有数据库名。</summary>
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public string[] StoreNames()
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{
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var list = new List<string>();
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if (Connect().IsEmpty())
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{
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var sql = "select [name] from [master]..[sysdatabases] order by [name]; ";
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var query = (Query)Query(sql);
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for (int r = 0; r < query.Rows; r++)
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{
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var cell = query.Text(r, 0);
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if (TextUtility.IsBlank(cell)) continue;
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if (cell == "master") continue;
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if (cell == "model") continue;
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if (cell == "msdb") continue;
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if (cell == "tempdb") continue;
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list.Add(cell);
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}
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query.Dispose();
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}
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return list.ToArray();
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}
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/// <summary>查询表中的所有列名。</summary>
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public string[] ColumnNames(string tableName)
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{
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var list = new List<string>();
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if (Connect().IsEmpty())
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{
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var table = TextUtility.AntiInject(tableName);
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var sql = TextUtility.Merge("select [name] from [syscolumns] where [id] = object_id('", table, "'); ");
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var query = (Query)Query(sql);
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for (int r = 0; r < query.Rows; r++)
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{
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var cell = query.Text(r, 0);
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if (TextUtility.IsBlank(cell)) continue;
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list.Add(cell);
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}
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query.Dispose();
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}
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return list.ToArray();
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}
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static string XType(int xtype)
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{
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switch (xtype)
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{
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case 34: return "image";
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case 35: return "text";
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case 36: return "uniqueidentifier";
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case 48: return "tinyint";
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case 52: return "smallint";
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case 56: return "int";
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case 58: return "smalldatetime";
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case 59: return "real";
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case 60: return "money";
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case 61: return "datetime";
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case 62: return "float";
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case 98: return "sql_variant";
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case 99: return "ntext";
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case 104: return "bit";
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case 106: return "decimal";
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case 108: return "numeric";
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case 122: return "smallmoney";
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case 127: return "bigint";
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case 165: return "varbinary";
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case 167: return "varchar";
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case 173: return "binary";
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case 175: return "char";
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case 189: return "timestamp";
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case 231: return "nvarchar";
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case 239: return "nchar";
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case 241: return "xml";
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}
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return null;
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}
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/// <summary>获取列信息。</summary>
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public ColumnInfo[] ColumnsInfo(string tableName)
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{
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if (tableName.IsEmpty()) throw new ArgumentNullException(nameof(tableName));
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var sql = $"select name, xtype, length from syscolumns where id = object_id('{tableName}') ";
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using (var query = Query(sql))
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{
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var ab = new ArrayBuilder<ColumnInfo>();
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for (var i = 0; i < query.Rows; i++)
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{
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var info = new ColumnInfo();
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info.Name = query.Text(i, "name");
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info.Type = XType(query.Int32(i, "xtype"));
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info.Length = query.Int32(i, "length");
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ab.Add(info);
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}
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return ab.Export();
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}
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}
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/// <summary>创建表,当表不存在时创建表,当现存表中缺少模型中属性对应的列时增加列。成功时返回空字符串,发生异常时返回异常信息。</summary>
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public string Initialize<T>() where T : class, new() => Initialize(typeof(T));
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/// <summary>创建表,当表不存在时创建表,当现存表中缺少模型中属性对应的列时增加列。成功时返回空字符串,发生异常时返回异常信息。</summary>
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public string Initialize(Type model)
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{
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var structure = TableStructure.Parse(model);
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if (structure == null) return "无法解析记录模型。";
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// 连接数据库。
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var connect = Connect();
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if (connect.NotEmpty()) return connect;
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// 检查现存表。
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var exists = false;
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var tables = TableNames();
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if (tables.Length > 0)
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{
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var lower = structure.Name.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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// 获取已存在的列名。
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var columns = ColumnNames(structure.Name);
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if (columns.Length > 0)
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{
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var lower = new List<string>();
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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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}
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columns = lower.ToArray();
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}
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// 增加列。
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foreach (var column in structure.Columns)
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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 = Declaration(column);
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if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
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var sql = TextUtility.Merge("alter table [", structure.Name, "] add ", type, "; ");
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var execute = Execute(sql);
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if (execute.Success == false) return execute.Message;
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}
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return TextUtility.Empty;
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}
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else
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{
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var sqlcolumns = new List<string>();
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foreach (var column in structure.Columns)
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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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var type = Declaration(column);
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if (!column.Independent && column.Property.Name == "Key") type = type + " primary key";
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if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
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sqlcolumns.Add(type);
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}
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var sql = TextUtility.Merge("create table [", structure.Name, "](", string.Join(", ", sqlcolumns.ToArray()), "); ");
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var execute = Execute(sql);
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if (execute.Success) return TextUtility.Empty;
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return execute.Message;
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}
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}
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/// <summary>插入记录。返回错误信息。</summary>
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public string Insert(object record, string table = null)
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{
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if (record == null) return "参数无效。";
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FixProperties(record);
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var structure = TableStructure.Parse(record.GetType());
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if (structure == null) return "无法解析记录模型。";
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if (string.IsNullOrEmpty(table)) table = structure.Name;
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if (string.IsNullOrEmpty(table)) return "表名称无效。";
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var ps = structure.CreateParameters(record, Parameter);
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var psc = ps.Length;
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if (psc < 1) return "数据模型不包含字段。";
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var names = new List<string>(psc);
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var values = new List<string>(psc);
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foreach (var column in ps)
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{
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//names.Add(TextGenerator.Merge("[", column, "]"));
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names.Add(TextUtility.Merge(column));
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values.Add("@" + column);
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}
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var sb = new StringBuilder();
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sb.Append("insert into [", table, "](", string.Join(", ", names.ToArray()), ") ");
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sb.Append("values(", string.Join(", ", values.ToArray()), "); ");
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var sql = sb.ToString();
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var execute = Execute(sql, ps);
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if (execute.Success) return TextUtility.Empty;
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return execute.Message;
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}
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/// <summary>更新记录,实体中的 Key 属性不被更新。返回错误信息。</summary>
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/// <remarks>无法更新带有 Independent 特性的模型(缺少 Key 属性)。</remarks>
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public string Update(IRecord record, string table = null)
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{
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if (record == null) return "参数无效。";
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FixProperties(record);
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SetUpdated(record);
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var structure = TableStructure.Parse(record.GetType());
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if (structure == null) return "无法解析记录模型。";
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|
if (structure.Independent) return "无法更新带有 Independent 特性的模型。";
|
|
if (string.IsNullOrEmpty(table)) table = structure.Name;
|
|
if (string.IsNullOrEmpty(table)) return "表名称无效。";
|
|
|
|
var ps = structure.CreateParameters(record, Parameter, "_key");
|
|
var psc = ps.Length;
|
|
if (psc < 1) return "数据模型不包含字段。";
|
|
|
|
var items = new List<string>();
|
|
foreach (var p in ps)
|
|
{
|
|
var pn = p.ParameterName;
|
|
items.Add(TextUtility.Merge("[", pn, "] = @", pn));
|
|
}
|
|
var key = record.Key.SafeKey();
|
|
var sql = TextUtility.Merge("update [", table, "] set ", string.Join(", ", items.ToArray()), " where [_key]='", key, "'; ");
|
|
|
|
var execute = Execute(sql, ps);
|
|
if (execute.Success) return TextUtility.Empty;
|
|
return execute.Message;
|
|
}
|
|
|
|
/// <summary>获取按指定语句查询到的所有记录。</summary>
|
|
public Result<object[]> Query(Type model, string sql) => OrmHelper.Query(this, model, sql);
|
|
|
|
/// <summary>获取按指定语句查询到的所有记录。</summary>
|
|
public Result<T[]> Query<T>(string sql) where T : class, new()
|
|
{
|
|
var query = Query(sql);
|
|
if (!query.Success) return new Result<T[]>(query.Message);
|
|
var records = query.Fill<T>();
|
|
query.Dispose();
|
|
|
|
var result = new Result<T[]>(records);
|
|
return result;
|
|
}
|
|
|
|
/// <summary>获取记录。</summary>
|
|
public Result<object[]> Query(Type model, long flag = 0) => OrmHelper.Query(this, model, (tn) =>
|
|
{
|
|
if (flag == 0) return $"select * from [{tn}]; ";
|
|
return $"select * from [{tn}] where _flag={flag}; ";
|
|
});
|
|
|
|
/// <summary>获取记录。</summary>
|
|
public Result<T[]> Query<T>(long flag = 0) where T : class, IRecord, new() => OrmHelper.Query<T>(this, (tn) =>
|
|
{
|
|
if (flag == 0) return $"select * from [{tn}]; ";
|
|
return $"select * from [{tn}] where _flag={flag}; ";
|
|
});
|
|
|
|
/// <summary>获取具有指定 Key 的记录。</summary>
|
|
public Result<object> Get(Type model, string key, long flag = 0) => OrmHelper.Get(this, model, key, (tn, sk) =>
|
|
{
|
|
if (flag == 0) return $"select top 1 * from [{tn}] _key='{sk}'; ";
|
|
return $"select top 1 * from [{tn}] where _key='{sk}' and _key='{sk}'; ";
|
|
});
|
|
|
|
/// <summary>获取具有指定 Key 的记录。</summary>
|
|
public Result<T> Get<T>(string key, long flag = 0) where T : class, IRecord, new() => OrmHelper.Get<T>(this, key, (tn, sk) =>
|
|
{
|
|
if (flag == 0) return $"select top 1 * from [{tn}] _key='{sk}'; ";
|
|
return $"select top 1 * from [{tn}] where _key='{sk}' and _key='{sk}'; ";
|
|
});
|
|
|
|
/// <summary>查询有效的 Key 值。</summary>
|
|
public Result<string[]> Keys(Type model, long flag = 0) => OrmHelper.Keys(this, model, (tn) =>
|
|
{
|
|
if (flag == 0) return $"select _key from [{tn}]; ";
|
|
return $"select _key from [{tn}] where _flag={flag}; ";
|
|
});
|
|
|
|
/// <summary>查询有效的 Key 值。</summary>
|
|
public Result<string[]> Keys<T>(long flag = 0) where T : class, IRecord, new() => Keys(typeof(T), flag);
|
|
|
|
#endregion
|
|
|
|
#region public static
|
|
|
|
#if NET20 || NET40
|
|
|
|
/// <summary>枚举本地网络中服务器的名称。</summary>
|
|
public static SqlServerSource[] EnumerateServer()
|
|
{
|
|
var list = new List<SqlServerSource>();
|
|
|
|
// 表中列名:ServerName、InstanceName、IsClustered、Version。
|
|
using (var query = new Query(SqlDataSourceEnumerator.Instance.GetDataSources()))
|
|
{
|
|
for (int i = 0; i < query.Rows; i++)
|
|
{
|
|
var item = new SqlServerSource();
|
|
item.ServerName = query.Text(i, "ServerName");
|
|
list.Add(item);
|
|
}
|
|
}
|
|
return list.ToArray();
|
|
}
|
|
|
|
#endif
|
|
|
|
/// <summary>指定的连接凭据是否符合连接要求,默认指定 master 数据库。</summary>
|
|
public static bool Proven(string address, string user, string pass) => Proven(address, "master", user, pass);
|
|
|
|
/// <summary>指定的连接凭据是否符合连接要求。</summary>
|
|
public static bool Proven(string address, string store, string user, string pass)
|
|
{
|
|
var a = string.IsNullOrEmpty(address);
|
|
var s = string.IsNullOrEmpty(store);
|
|
var u = string.IsNullOrEmpty(user);
|
|
var p = string.IsNullOrEmpty(pass);
|
|
if (a) return false;
|
|
if (s) return false;
|
|
if (u && !p) return false;
|
|
return true;
|
|
}
|
|
|
|
/// <summary>创建参数。</summary>
|
|
/// <exception cref="ArgumentNullException"></exception>
|
|
/// <exception cref="InvalidOperationException"></exception>
|
|
static SqlParameter Parameter(Parameter parameter)
|
|
{
|
|
if (parameter == null) throw new InvalidOperationException("参数无效。");
|
|
return Parameter(parameter.Name, parameter.Type, parameter.Size, parameter.Value);
|
|
}
|
|
|
|
/// <summary>创建参数。</summary>
|
|
public static SqlParameter Parameter(string name, ColumnType type, int size, object value)
|
|
{
|
|
var vname = TextUtility.Trim(name);
|
|
if (TextUtility.IsBlank(vname)) return null;
|
|
|
|
var vtype = SqlDbType.BigInt;
|
|
switch (type)
|
|
{
|
|
case ColumnType.Bytes:
|
|
vtype = SqlDbType.Image;
|
|
break;
|
|
case ColumnType.Integer:
|
|
vtype = SqlDbType.BigInt;
|
|
break;
|
|
case ColumnType.Float:
|
|
vtype = SqlDbType.Float;
|
|
break;
|
|
case ColumnType.DateTime:
|
|
vtype = SqlDbType.DateTime;
|
|
break;
|
|
case ColumnType.VarChar:
|
|
case ColumnType.VarChar191:
|
|
case ColumnType.VarCharMax:
|
|
vtype = SqlDbType.VarChar;
|
|
break;
|
|
case ColumnType.NVarChar:
|
|
case ColumnType.NVarChar191:
|
|
case ColumnType.NVarCharMax:
|
|
vtype = SqlDbType.NVarChar;
|
|
break;
|
|
case ColumnType.Text:
|
|
vtype = SqlDbType.Text;
|
|
break;
|
|
case ColumnType.NText:
|
|
vtype = SqlDbType.NText;
|
|
break;
|
|
default:
|
|
throw new InvalidOperationException(TextUtility.Merge("类型 ", type.ToString(), " 不受支持。"));
|
|
}
|
|
|
|
var vsize = size;
|
|
switch (type)
|
|
{
|
|
case ColumnType.VarChar:
|
|
vsize = NumberUtility.Restrict(vsize, 0, 8000);
|
|
break;
|
|
case ColumnType.NVarChar:
|
|
vsize = NumberUtility.Restrict(vsize, 0, 4000);
|
|
break;
|
|
case ColumnType.VarChar191:
|
|
case ColumnType.NVarChar191:
|
|
vsize = NumberUtility.Restrict(vsize, 0, 191);
|
|
break;
|
|
default:
|
|
vsize = 0;
|
|
break;
|
|
}
|
|
|
|
var vvalue = value;
|
|
if (vvalue is string && vvalue != null && vsize > 0)
|
|
{
|
|
vvalue = TextUtility.Left((string)vvalue, vsize);
|
|
}
|
|
|
|
var parameter = new SqlParameter();
|
|
parameter.ParameterName = vname;
|
|
parameter.SqlDbType = vtype;
|
|
parameter.Value = vvalue;
|
|
if (vsize > 0) parameter.Size = vsize;
|
|
return parameter;
|
|
}
|
|
|
|
/// <summary>创建参数。</summary>
|
|
public static SqlParameter Parameter(string name, SqlDbType type, int size, object value)
|
|
{
|
|
if (value is string && value != null && size > 0)
|
|
{
|
|
value = TextUtility.Left((string)value, (int)size);
|
|
}
|
|
|
|
var p = new SqlParameter();
|
|
p.ParameterName = name ?? "";
|
|
p.SqlDbType = type;
|
|
p.Size = size;
|
|
p.Value = value;
|
|
return p;
|
|
}
|
|
|
|
/// <summary>创建参数。</summary>
|
|
public static SqlParameter Parameter(string name, SqlDbType type, object value)
|
|
{
|
|
var p = new SqlParameter();
|
|
p.ParameterName = name ?? "";
|
|
p.SqlDbType = type;
|
|
p.Value = value;
|
|
return p;
|
|
}
|
|
|
|
static string Declaration(ColumnAttribute column)
|
|
{
|
|
var type = TextUtility.Empty;
|
|
var vcolumn = column;
|
|
var length = Math.Max(0, vcolumn.Length);
|
|
switch (vcolumn.Type)
|
|
{
|
|
case ColumnType.Integer:
|
|
type = "bigint";
|
|
break;
|
|
case ColumnType.Float:
|
|
type = "float";
|
|
break;
|
|
case ColumnType.Bytes:
|
|
type = "image";
|
|
break;
|
|
case ColumnType.DateTime:
|
|
type = "datetime";
|
|
break;
|
|
case ColumnType.VarChar:
|
|
type = TextUtility.Merge("varchar(", Math.Min(8000, length).ToString(), ")");
|
|
break;
|
|
case ColumnType.VarChar191:
|
|
type = TextUtility.Merge("varchar(191)");
|
|
break;
|
|
case ColumnType.VarCharMax:
|
|
type = TextUtility.Merge("varchar(max)");
|
|
break;
|
|
case ColumnType.Text:
|
|
type = TextUtility.Merge("text");
|
|
break;
|
|
case ColumnType.NVarChar:
|
|
type = TextUtility.Merge("nvarchar(", Math.Min(4000, length).ToString(), ")");
|
|
break;
|
|
case ColumnType.NVarChar191:
|
|
type = TextUtility.Merge("nvarchar(191)");
|
|
break;
|
|
case ColumnType.NVarCharMax:
|
|
type = TextUtility.Merge("nvarchar(max)");
|
|
break;
|
|
case ColumnType.NText:
|
|
type = TextUtility.Merge("ntext");
|
|
break;
|
|
default:
|
|
return TextUtility.Empty;
|
|
}
|
|
return TextUtility.Merge("[", vcolumn.Field, "] ", type);
|
|
}
|
|
|
|
#endregion
|
|
|
|
}
|
|
|
|
}
|
|
|