C#获取存储过程的返回值

存储过程很简单返回一个数字，

 1 CREATE PROCEDURE up_GetReturnValue
 2     @a int,
 3     @b int
 4 AS
 5 BEGIN
 6     SET NOCOUNT ON;
 7 
 8     RETURN @a+@b
 9 END
10 GO

获取存储过程返回值的方法：

 SqlParameter returnPara = new SqlParameter();
2 returnPara.ParameterName = "@ReturnValue";
3 returnPara.Direction = ParameterDirection.ReturnValue;
4 returnPara.DbType = DbType.Int;
5 cmd.Parameters.Add(returnPara);
6 
7 cmd.ExecuteNonQuery("up_GetReturnValue", CommandType.StoredProcedure);
8 return Convert.ToInt(returnPara.Value);