109 lines
3.6 KiB
C#
109 lines
3.6 KiB
C#
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using Models.Const;
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using SamplePre.Common;
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using SqlSugar;
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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SamplePre.DAL.DBContext
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{
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public class DBFactory
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{
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#region 单例实例
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private static readonly Lazy<SqlSugarClient> _lazySqlSugarClient = new Lazy<SqlSugarClient>(() =>
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{
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return CreateSqlSugarClient();
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});
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/// <summary>
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/// 获取默认数据库的SqlSugarClient单例实例
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/// </summary>
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public static SqlSugarClient Instance => _lazySqlSugarClient.Value;
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#endregion
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#region 从App.config读取的配置项（静态构造函数初始化，仅执行一次）
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private static readonly string _connStr; // 数据库连接字符串
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private static readonly bool _isAutoCloseConn; // 是否自动关闭连接
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/// <summary>
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/// 静态构造函数：读取App.config配置，初始化全局参数
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/// </summary>
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static DBFactory()
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{
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try
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{
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// 1. 读取数据库连接字符串（MySQL）
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_connStr = SystemConst.SysConfigInfo.DbConfig.MySql.ConnStr;//"Data Source=localhost;Database=fanghuayuan;AllowLoadLocalInfile=true;User ID=root;Password=123;allowPublicKeyRetrieval=true;pooling=true;port=3306;";
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// 2. 读取SqlSugar全局配置（AppSettings节点）
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_isAutoCloseConn = true;//Convert.ToBoolean(ConfigurationManager.AppSettings["SqlSugar_IsAutoCloseConnection"]);
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}
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catch (Exception ex)
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{
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throw new Exception("SqlSugar工厂类配置读取失败：" + ex.Message);
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}
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}
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#endregion
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#region 核心方法：创建SqlSugarClient并配置全局参数
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/// <summary>
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/// 封装SqlSugarClient的创建、数据库配置、全局AOP
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/// </summary>
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/// <returns>配置完成的SqlSugarClient实例</returns>
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private static SqlSugarClient CreateSqlSugarClient()
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{
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// 1. 数据库连接核心配置（按需修改DbType：对应连接字符串）
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var connectionConfig = new ConnectionConfig
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{
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ConnectionString = _connStr, // 连接字符串
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DbType = SqlSugar.DbType.MySql, // 数据库类型：
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IsAutoCloseConnection = _isAutoCloseConn, // 自动关闭连接（必开，避免连接泄漏）
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InitKeyType = InitKeyType.Attribute, // 从实体类特性读取主键/自增配置（核心）
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};
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// 2. 创建SqlSugarClient实例
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var db = new SqlSugarClient(connectionConfig);
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db.Aop.OnError = (ex) =>
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{
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string errorLog = $@"【SQL执行异常】{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}
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【异常信息】{ex.Message}
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【SQL语句】{ex.Sql}";
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// 异常日志写入本地文件
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LoggerHelper.Logger.Error(errorLog);
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};
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return db;
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}
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#endregion
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#region 辅助：手动释放资源（单例模式一般无需调用，程序退出时可选）
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/// <summary>
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/// 手动释放SqlSugarClient资源（仅特殊场景使用）
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/// </summary>
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public static void DisposeInstance()
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{
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if (_lazySqlSugarClient.IsValueCreated)
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{
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Instance.Dispose();
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}
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}
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#endregion
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}
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}
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