C#给SqlSugar封装一个单例类

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可以直接用，轻量方便，无需重复造轮子。 这里只对CRUD进行封装，我的应用比较简单。

using SqlSugar;
using System.Collections.Generic;namespace MusicApp.Assist
{internal class SqlSugarAssist{private static readonly object _lock = new object();private static SqlSugarAssist _instance;private readonly ISqlSugarClient _db;private SqlSugarAssist(string connectionString){_db = new SqlSugarClient(new ConnectionConfig(){ConnectionString = connectionString,DbType = DbType.SqlServer, // 或其他数据库类型IsAutoCloseConnection = true});}///单例实现public static SqlSugarAssist GetInstance(string connectionString) {if (_instance == null) {lock (_lock) {if (_instance == null) {_instance=new SqlSugarAssist(connectionString); }}}return _instance;}// 插入操作public int Insert<T>(T entity) where T : class,new(){return _db.Insertable(entity).ExecuteCommand();}// 删除操作public int Delete<T>(dynamic list) where T : class, new(){return _db.Deleteable<T>(list).ExecuteCommand();}// 更新操作public int Update<T>(T entity) where T : class, new(){return _db.Updateable(entity).ExecuteCommand();}// 查询操作public List<T> Select<T>(){return _db.Queryable<T>().ToList();}}
}