使用c#代码中的dapper将输出参数传递给存储过程

I have a stored procedure in this format

我有一个这种格式的存储过程。

CREATE PROCEDURE SP_MYTESTpROC
    @VAR1 VARCHAR(10),
    @VAR2 VARCHAR(20),
    @BASEID INT ,
    @NEWID INT OUTPUT
As Begin
   INSERT INTO TABLE_NAME(username, firstname)
      select @VAR1, @VAR2 
      WHERE ID = @BASEID

   SET @NEWID = SCOPE_IDENTITY() AS INT
END

I am calling this stored procedure from C# code using dapper. My question is: how do I pass in the output parameter to the stored procedure while using dapper?

我使用dapper从c#代码调用这个存储过程。我的问题是:如何在使用dapper时将输出参数传递给存储过程?

1 个解决方案

#1

Just searching the Test.cs file you could find this example

只是搜索测试。你可以找到这个例子

    public void TestProcSupport()
    {
        var p = new DynamicParameters();
        p.Add("a", 11);
        p.Add("b", dbType: DbType.Int32, direction: ParameterDirection.Output);
        p.Add("c", dbType: DbType.Int32, direction: ParameterDirection.ReturnValue);
        connection.Execute(@"create proc #TestProc 
                         @a int,
                             @b int output
                             as 
                             begin
                                 set @b = 999
                                 select 1111
                                 return @a
                             end");
        connection.Query<int>("#TestProc", p, commandType: CommandType.StoredProcedure).First().IsEqualTo(1111);
        p.Get<int>("c").IsEqualTo(11);
        p.Get<int>("b").IsEqualTo(999);
    }

So, I suppose that your C# code could be written as

所以，我认为您的c#代码可以写成

    public void InsertData()
    {
        var p = new DynamicParameters();
        p.Add("VAR1", "John");
        p.Add("VAR2", "McEnroe");
        p.Add("BASEID", 1);
        p.Add("NEWID", dbType: DbType.Int32, direction: ParameterDirection.Output);
        connection.Query<int>("SP_MYTESTpROC", p, commandType: CommandType.StoredProcedure);
        int newID =  p.Get<int>("NEWID");
    }

As a side note, do not use SP as prefix for your stored procedure. It is reserved for system defined procedures and you could find yourself in troubles if Microsoft decides to use the same name. Albeit improbable it is a bad practice and why risk?

另外，不要将SP用作存储过程的前缀。它只适用于系统定义的过程，如果微软决定使用相同的名称，您可能会发现自己遇到了麻烦。虽然不太可能，但这是一种不好的做法，为什么要冒险呢?

#1