c# - Dapper 调用存储过程并将结果映射到类

Question

我有一个 T-SQL 存储过程:

CREATE PROCEDURE [dbo].[GetRequestTest] 
        @RequestId UNIQUEIDENTIFIER
AS
BEGIN
    SELECT 
        Request.Amount,
        Request.Checksum 
    FROM 
        Request 
    WHERE
        RequestId = @RequestId
END

C#映射类:

public class CustomTest : Itest
{
    public decimal Amount {get;set;}
    public string Checksum { get; set; }
}

我正在尝试使用 Dapper 调用存储过程:

public void Load(CustomTest obj, Guid RequestId)
{
    using (var con = base.GetClosedConnection())
    {
        con.Open();

        var p = new DynamicParameters();
        p.Add("@RequestId", dbType: DbType.Guid, direction: ParameterDirection.Input);               

        var result = con.ExecuteReader("[dbo].[GetRequestTest]", param: p, commandType: CommandType.StoredProcedure);

        while (result.Read())
             obj.Amount = (decimal)result["Amount"];
    }            
}

但结果为空

我尝试调用以将存储过程中的 SQL 语句直接放入 C# 代码中 - 它工作正常，但不适用于存储过程。

任何想法 - 如何让它发挥作用？

Answer 1

你调用了错误的方法:

public void Load(CustomTest obj, Guid RequestId)
{
    using (var con = base.GetClosedConnection())
    {
        con.Open();                

        //result is list of CustomTest
        var result = db.Query<CustomTest>("GetRequestTest", new {RequestId},
                         commandType: CommandType.StoredProcedure);
    }            
}

如何使用小巧玲珑:https://github.com/StackExchange/dapper-dot-net