#if DEBUG
/* 2021.11.28 */
using Apewer;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Text;
using static Apewer.Source.OrmHelper;
using System.Data.SqlClient;
#if NETFRAMEWORK
using System.Data.Sql;
#endif
namespace Apewer.Source
{
///
[Serializable]
public class SqlClientThin : DbClient, IDbClient
{
#region
string _str = null;
/// 使用连接字符串创建数据库连接实例。
public SqlClientThin(string connectionString, Timeout timeout = null) : base(timeout)
{
_str = connectionString ?? "";
}
/// 使用连接凭据创建数据库连接实例。
public SqlClientThin(string address, string store, string user, string pass, Timeout timeout = null) : base(timeout)
{
if (timeout == null) timeout = Timeout.Default;
var a = address ?? "";
var s = store ?? "";
var u = user ?? "";
var p = pass ?? "";
var cs = $"data source = {a}; initial catalog = {s}; ";
if (string.IsNullOrEmpty(u)) cs += "integrated security = sspi; ";
else
{
cs += $"user id = {u}; ";
if (!string.IsNullOrEmpty(p)) cs += $"password = {p}; ";
}
cs += $"connection timeout = {timeout.Connect}; ";
_str = cs;
}
/// 为 Ado 创建连接字符串。
protected override string NewConnectionString() => _str;
/// 为 Ado 创建 IDbConnection 对象。
protected override IDbConnection NewConnection() => new SqlConnection();
/// 为 Ado 创建 IDbCommand 对象。
protected override IDbCommand NewCommand() => new SqlCommand();
/// 为 Ado 创建 IDataAdapter 对象。
protected override IDataAdapter NewDataAdapter(IDbCommand command) => new SqlDataAdapter((SqlCommand)command);
#endregion
#region ORM
/// 查询数据库中的所有表名。
public override string[] TableNames() => TextColumn("select [name] from [sysobjects] where [type] = 'u' order by [name]; ");
/// 查询数据库实例中的所有数据库名。
public override string[] StoreNames() => TextColumn("select [name] from [master]..[sysdatabases] order by [name]; ", new string[] { "master", "model", "msdb", "tempdb" });
/// 查询表中的所有列名。
public override string[] ColumnNames(string tableName) => TextColumn($"select [name] from [syscolumns] where [id] = object_id('{tableName}'); ");
/// 获取列信息。
public override ColumnInfo[] ColumnsInfo(string tableName)
{
if (tableName.IsEmpty()) throw new ArgumentNullException(nameof(tableName));
var sql = $"select name, xtype, length from syscolumns where id = object_id('{tableName}') ";
using (var query = Query(sql))
{
var ab = new ArrayBuilder();
for (var i = 0; i < query.Rows; i++)
{
var info = new ColumnInfo();
info.Name = query.Text(i, "name");
info.Type = XType(query.Int32(i, "xtype"));
info.Length = query.Int32(i, "length");
ab.Add(info);
}
return ab.Export();
}
}
/// 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。
public override string Initialize(Type model)
{
var structure = TableStructure.Parse(model);
if (structure == null) return "无法解析记录模型。";
// 连接数据库。
var connect = Connect();
if (connect.NotEmpty()) return connect;
// 检查现存表。
var exists = false;
var tables = TableNames();
if (tables.Length > 0)
{
var lower = structure.Name.ToLower();
foreach (var table in tables)
{
if (TextUtility.IsBlank(table)) continue;
if (table.ToLower() == lower)
{
exists = true;
break;
}
}
}
if (exists)
{
// 获取已存在的列名。
var columns = ColumnNames(structure.Name);
if (columns.Length > 0)
{
var lower = new List();
foreach (var column in columns)
{
if (TextUtility.IsBlank(column)) continue;
lower.Add(column.ToLower());
}
columns = lower.ToArray();
}
// 增加列。
foreach (var column in structure.Columns)
{
// 检查 Independent 特性。
if (structure.Independent && column.Independent) continue;
// 去重。
var lower = column.Field.ToLower();
if (columns.Contains(lower)) continue;
var type = Declaration(column);
if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
var sql = TextUtility.Merge("alter table [", structure.Name, "] add ", type, "; ");
var execute = Execute(sql);
if (execute.Success == false) return execute.Message;
}
return TextUtility.Empty;
}
else
{
var sqlcolumns = new List();
foreach (var column in structure.Columns)
{
// 检查 Independent 特性。
if (structure.Independent && column.Independent) continue;
var type = Declaration(column);
if (!column.Independent && column.Property.Name == "Key") type = type + " primary key";
if (string.IsNullOrEmpty(type)) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。");
sqlcolumns.Add(type);
}
var sql = TextUtility.Merge("create table [", structure.Name, "](", string.Join(", ", sqlcolumns.ToArray()), "); ");
var execute = Execute(sql);
if (execute.Success) return TextUtility.Empty;
return execute.Message;
}
}
/// 插入记录。返回错误信息。
public override string Insert(object record, string table = null)
{
if (record == null) return "参数无效。";
FixProperties(record);
var structure = TableStructure.Parse(record.GetType());
if (structure == null) return "无法解析记录模型。";
if (string.IsNullOrEmpty(table)) table = structure.Name;
if (string.IsNullOrEmpty(table)) return "表名称无效。";
var ps = structure.CreateParameters(record, Parameter);
var psc = ps.Length;
if (psc < 1) return "数据模型不包含字段。";
var names = new List(psc);
var values = new List(psc);
foreach (var column in ps)
{
//names.Add(TextGenerator.Merge("[", column, "]"));
names.Add(TextUtility.Merge(column));
values.Add("@" + column);
}
var sb = new StringBuilder();
sb.Append("insert into [", table, "](", string.Join(", ", names.ToArray()), ") ");
sb.Append("values(", string.Join(", ", values.ToArray()), "); ");
var sql = sb.ToString();
var execute = Execute(sql, ps);
if (execute.Success) return TextUtility.Empty;
return execute.Message;
}
/// 更新记录,实体中的 Key 属性不被更新。返回错误信息。
/// 无法更新带有 Independent 特性的模型(缺少 Key 属性)。
public override string Update(IRecord record, string table = null)
{
if (record == null) return "参数无效。";
FixProperties(record);
SetUpdated(record);
var structure = TableStructure.Parse(record.GetType());
if (structure == null) return "无法解析记录模型。";
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();
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;
}
/// 获取记录。
public override Result