Question

所以我有两个变量，即

Public statusId As String = String.Empty
Public orderDescription As String = String.Empty

我想在一个函数中设置它们的值，这就是我试过的

Public Function GetOrderDetails(ByVal statusId As String, ByVal orderDescription As String, ByVal orderID As String, ByVal userID As String) As String

    Dim conn As New DBConnection()
    Dim sql_UserAttempts As SqlCommand = conn.SetStoredProcedure("spOrderDetailsByUserId")

    DBConnection.AddNewParameter(sql_UserAttempts, "@order_ID", ParameterDirection.Input, SqlDbType.Int, orderID)
    DBConnection.AddNewParameter(sql_UserAttempts, "@user_ID", ParameterDirection.Input, SqlDbType.Int, userID)

    Try
        conn.Open()
        Dim reader_attempts As SqlDataReader = sql_UserAttempts.ExecuteReader()
        If reader_attempts.HasRows Then
            While reader_attempts.Read()
                statusId = reader_attempts("statusId").ToString()
                orderDescription = reader_attempts("ud_orderDescription").ToString()
            End While
        End If
    Catch ex As Exception
        M1Utils.ErrorHandler(ex)
    Finally
        conn.Close()
    End Try
    Return statusId
End Function

但是当我在函数之后打印出它们的值时它们仍然是空白的，所以我想知道我应该使用什么类型的功能，即子功能，......这样做？

像这样打电话

            '# Retrieve Order Information
        GetOrderDetails(statusId, orderDescription, orderID, userID)

Answer 1

像这样定义你的功能

Public Function GetOrderDetails(ByRef statusId As String, ByRef orderDescription As String, ByVal orderID As String, ByVal userID As String) As String

ASP.NET如何在函数中设置变量值

1 个答案: