使用数组中的两个参数调用存储过程

Question

我想用来自存储过程 pp_sp_MachineAndOp 的数据填充组合框，其中有两个参数：

ALTER PROCEDURE [dbo].[pp_sp_MachineAndOp]
    @MachineAndOpID int,
    @Seq int
AS
BEGIN
    SET NOCOUNT ON;

    IF @MachineAndOpID = 0
        --Show All
        IF @Seq = 0
            SELECT 
                mo.*,
                o.Operation, o.Seq,
                m.Machine
            FROM 
                [dbo].[pp_MachineAndOp] mo
            INNER JOIN  
                pp_Machines m ON m.MachineID = mo.MachineID
            INNER JOIN 
                pp_vw_Operations o ON o.OperationID = mo.OperationID
            WHERE 
                m.Active = 1
            ORDER BY 
                mo.OperationID, MachinePriority

        ELSE
            --show all following operations
            SELECT 
                mo.*,
                o.Operation, o.Seq,
                m.Machine
            FROM 
                [dbo].[pp_MachineAndOp] mo
            INNER JOIN 
                pp_Machines m ON m.MachineID = mo.MachineID
            INNER JOIN 
                pp_vw_Operations o ON o.OperationID = mo.OperationID
            WHERE
                m.Active = 1 AND o.Seq > @Seq
            ORDER BY 
                mo.OperationID, MachinePriority

    ELSE
        -- Show Selected
        SELECT 
            mo.*,
            o.Operation, o.Seq,
            m.Machine
        FROM 
            [dbo].[pp_MachineAndOp] mo
        INNER JOIN 
            pp_Machines m ON m.MachineID = mo.MachineID
        INNER JOIN 
            pp_vw_Operations o ON o.OperationID = mo.OperationID 
        WHERE
            m.Active = 1 
            AND mo.MachineAndOpID = @MachineAndOpID
        ORDER BY 
            mo.OperationID, MachinePriority
END

如果我在 SQL Server Management Studio 中执行它，它工作得很好。

在 C# 中，我有这个方法从存储过程中获取数据：

public static DataTable ExecuteDataTable(string storedProcedureName, params SqlParameter[] arrParam)
{
    DataTable dt = new DataTable();

    // Open the connection 
    using (SqlConnection sqlConn = new SqlConnection(strConn))
    {
        try
        {
            sqlConn.Open();

            // Define the command 
            using (SqlCommand sqlCmd = new SqlCommand())
            {
                sqlCmd.Connection = sqlConn;
                sqlCmd.CommandType = CommandType.StoredProcedure;
                sqlCmd.CommandText = storedProcedureName;

                // Handle the parameters 
                if (arrParam != null)
                {
                    foreach (SqlParameter param in arrParam)
                    {
                        sqlCmd.Parameters.Add(param);
                    }
                }

                // Define the data adapter and fill the dataset 
                using (SqlDataAdapter da = new SqlDataAdapter(sqlCmd))
                {
                    da.Fill(dt);
                }
            }
        }
        catch (SqlException ex)
        {
            MessageBox.Show(ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

    return dt;
}

如果我这样调用它，我不会收到任何错误，结果也符合预期：

DataTable dtMO = Helper.ExecuteDataTable("pp_sp_MachineAndOp", 
                                         new SqlParameter("@MachineAndOpID", "0"), 
                                         new SqlParameter("@Seq", "0"));

如果我这样称呼它

DataTable dtMO = Helper.ExecuteDataTable("pp_sp_MachineAndOp", 
                                         new SqlParameter("@MachineAndOpID", "0"), 
                                         new SqlParameter("@Seq", "7"));

我收到一个错误

Parameter @MachineAndOpID not supplied

我在这次通话中遇到同样的错误：

DataTable dtMO = Helper.ExecuteDataTable("pp_sp_MachineAndOp", 
                                         new SqlParameter("@MachineAndOpID",0), 
                                         new SqlParameter("@Seq", 0));

这里：

DataTable dtMO = Helper.ExecuteDataTable("pp_sp_MachineAndOp", 
                                         new SqlParameter("@MachineAndOpID",SqlDbType.BigInt, 0), 
                                         new SqlParameter("@Seq",SqlDbType.BigInt, 7));

我觉得它与数据类型有某种关系，但不知道如何解决它。

Answer 1

您必须定义正确的数据类型。
它应该像这样工作：

DataTable dtMO = Helper.ExecuteDataTable("pp_sp_MachineAndOp",
                                           new SqlParameter("@MachineAndOpID", SqlDbType.Int) { Value = 6 },
                                           new SqlParameter("@Seq", SqlDbType.Int) { Value = 6 });

看这里：Data Type Mappings

使用数组中的两个参数调用存储过程

Call a stored procedure with two parameters in array

c#

sql-server

parameters

datatable

stored-procedures