Question

首先，我对此主题进行了大量研究，但不幸的是，我没有找到适合我的方法。这是我的存储过程

USE [SIM]
GO
Create Proc [dbo].[AddPaymentTracking]

       @NPaymentRequest nvarchar(50),
       @DatePayment date,
       @id int out
AS
INSERT INTO [dbo].[PaymentTracking]
       ([NPaymentRequest]
       ,[DatePayment])

 VALUES
       (@NPaymentRequest, 
       @DatePayment)

Set @id=@@IDENTITY

这是我的C＃类代码

public async Task AddPaymentTracking(string NPaymentRequest, DateTime DatePayment)
    {
        DAL.DataAccessLayer DAL = new DAL.DataAccessLayer();
        await Task.Run(() => DAL.Open()).ConfigureAwait(false);
        SqlParameter[] param = new SqlParameter[3];

        param[0] = new SqlParameter("@NPaymentRequest", SqlDbType.NVarChar, 50)
        {
            Value = NPaymentRequest
        };

        param[1] = new SqlParameter("@DatePayment", SqlDbType.Date)
        {
            Value = DatePayment
        };

        param[2] = new SqlParameter("@id", SqlDbType.Int);
        param[2].Direction = ParameterDirection.Output;



        await Task.Run(() => DAL.ExcuteCommande("AddPaymentTracking", param)).ConfigureAwait(false);
        DAL.Close();

    }

这是我的C＃表单代码

private async  void btnSave_Click(object sender, EventArgs e)
    {
     await supply.AddPaymentTracking(txtNPaymentRequest.Text, Convert.ToDateTime(txtDatePayment.EditValue, CultureInfo.CurrentCulture)).ConfigureAwait(true);  
     //int output = Get output Parameter
    }

我该怎么办？
预先感谢

Answer 1

除非可以将AddPaymentTracking方法中的out参数值作为输出（或引用）参数公开，否则您可以在btnSave_Click方法中获取out参数值，而不能在AddPaymentTracking中获取。 >

    public async Task AddPaymentTracking(string NPaymentRequest, DateTime DatePayment, out int newRecordId)
    {
        . . .
        . . .

        await Task.Run(() => DAL.ExcuteCommande("AddPaymentTracking", param)).ConfigureAwait(false);

        newRecordId = (int)param[2].Value;
        DAL.Close();
    }

这是使用新签名调用方法的方式：

    private async void btnSave_Click(object sender, EventArgs e)
    {
        int output;
        await supply.AddPaymentTracking
        (
            txtNPaymentRequest.Text,
            Convert.ToDateTime(txtDatePayment.EditValue, CultureInfo.CurrentCulture), 
            out output
        ).ConfigureAwait(true);

        . . .
        . . .
    }

如何在C＃的存储过程中使用输出参数

1 个答案: