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  • Dapper批量更新

    本次示例项目使用Dappe1.50.5和Dapper.Contrib1.50.5
    数据库执行的脚本检测工具是SQL Server Prifiler

    1.使用Where In 实现批量更新

    1.1代码如下:

    /// <summary>
    /// 把多个用户的isvalid置为0
    /// </summary>
    public void UpdateUsersByWhereInTest()
    {
        var sql = @"UPDATE dbo.[user] SET isvalid=0 WHERE UserId IN @UserId ;";
        var userIdArr = new int[] { 3013, 3012, 3011, 3010 };
        var res = Repository.Execute(sql, new { UserId = userIdArr });
        Assert.True(res > 0);
    }
    

    1.2检测到数据库执行的脚本

    exec sp_executesql N'UPDATE dbo.[user] 
    					 SET isvalid=0 
    					 WHERE UserId IN (@UserId1,@UserId2,@UserId3,@UserId4) ;',
    					 N'@UserId1 int,@UserId2 int,
    					   @UserId3 int,@UserId4 int',
    				       @UserId1=3013,@UserId2=3012,
    					   @UserId3=3011,@UserId4=3010
    

    2.更新多条数据,每一条数据更新的内容可不相同

    2.1代码如下

    /// <summary>
    /// 分别把用户Id是3013的用户名称更新为张三,用户Id是3012的用户名称更新为李四
    /// </summary>
    [Fact]
    public void UpdateUsersTest()
    {
        var sql = @"UPDATE dbo.[user] SET UserName=@UserName WHERE UserId = @UserId ;";
        var users = new List<User> {
            new User { UserId=3013, UserName = "张三", },
            new User { UserId =3012, UserName = "李四",  },
       };
        var res = Repository.Execute(sql,users);
        Assert.True(res > 0);
    }
    

    2.2检测到数据库执行的脚本

    生成两条Update脚本执行

    exec sp_executesql N'UPDATE dbo.[user] 
    					 SET UserName=@UserName 
    					 WHERE UserId = @UserId ;',
    					 N'@UserId int,@UserName nvarchar(4000)',
    					 @UserId=3013,@UserName=N'张三'
    
    exec sp_executesql N'UPDATE dbo.[user] 
    					 SET UserName=@UserName 
    					 WHERE UserId = @UserId ;',
    					 N'@UserId int,@UserName nvarchar(4000)',
    					 @UserId=3012,@UserName=N'李四'
    

    示例代码下载地址

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  • 原文地址:https://www.cnblogs.com/wuyunblog/p/9456756.html
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