以MySQL数据库为例

一. 安装

NuGet搜索Dapper.Lite并安装最新版本。

NuGet搜索MySql.Data并安装最新版本。

二. 实现数据库Provider

using Dapper.Lite; using MySql.Data.MySqlClient; using System.Data.Common;  namespace DAL {     public class MySQLProvider : MySQLProviderBase, IDbProvider     {         #region 创建 DbConnection         public override DbConnection CreateConnection(string connectionString)         {             return new MySqlConnection(connectionString);         }         #endregion          #region 生成 DbParameter         public override DbParameter GetDbParameter(string name, object value)         {             return new MySqlParameter(name, value);         }         #endregion      } } 

三. 创建IDapperLiteClient实例

IDapperLiteClient db = new DapperLiteClient(     "Data Source=localhost;Port=3306;User ID=root;Password=123456;Initial Catalog=litesql_test;Charset=utf8mb4;SslMode=none;Allow User Variables=True;",      DBType.MySQL,      new MySQLProvider()); 

四. 查询示例

SQL查询

IDbSession session = db.GetSession(); ISqlString sql = session.Sql("select * from sys_user where id <= @Id and remark like @Remark", 20, "%测试%"); List<SysUser> list = sql.QueryList<SysUser>(); 

Lambda查询

IDbSession session = db.GetSession(); List<SysUser> list = session.Queryable<SysUser>().Where(t => t.Id <= 20 && t.Remark.Contains("测试")).ToList(); 

SQL和Lambda表达式混写

IDbSession session = db.GetSession(); List<BsOrder> list = session.Sql<BsOrder>(@"     select t.*, u.user_name as OrderUserName      from bs_order t     left join sys_user u on u.id = t.order_userid")     .Where(t => t.Amount > 100 && t.OrderTime > new DateTime(2022, 1, 1))     .Where<SysUser>(u => u.RealName == "张三")     .ToList(); 

更多示例

README.md (gitee)

wiki (gitee)

README.md (github)

wiki (github)