Question

以下代码适用于Asp.net Gridview控件中的数据第1页：

     If e.CommandName = "Void" Then

        'Read the status of the ticket currently
        Dim RowIndex As Integer = CInt(e.CommandArgument)
        Dim row As GridViewRow = grdTradeTickets.Rows(RowIndex)

        Dim lblTransactionID As Label = DirectCast(row.FindControl("lblTransactionID"), Label)
        Dim lblTtStatus As Label = DirectCast(row.FindControl("lblTtStatus"), Label)
        Dim lblTradeTicketID As Label = DirectCast(row.FindControl("lblTradeTicketID"), Label)

        'If already void, show "Already Void" message to user. Else continue "Are you sure you want to void this Trade Ticket?"
        If lblTtStatus.Text = "Void" Then

            mdlPopupAlready.show()

        Else

            mdlPopup.Show()
            lblTradeTicketIdToVoid.Text = lblTradeTicketID.Text

        End If

    End If

但是，如果用户点击任何后续页面上的“Void”按钮，则会引发以下错误：

“索引超出范围。必须是非负数且小于集合的大小。参数名称：索引”

它不像索引是null或其他东西。它有价值。想法？

Answer 1

尝试更换行：

Dim RowIndex As Integer = CInt(e.CommandArgument)
Dim row As GridViewRow = grdTradeTickets.Rows(RowIndex)

与

Dim row As GridViewRow = DirectCast(DirectCast(e.CommandSource, Control).Parent.Parent, GridViewRow)

Answer 2

我遇到了同样的问题。然后事实证明是SubString（）方法的问题。我在做什么我是使用索引从字符串中获取子字符串。像

myString.SubString（3,6）;

在myString中，我传递“abc”表示长度为3的字符串。查找一些使用子字符串或集合的代码并尝试调试它。干杯：）

在启用了分页的Asp.net Gridview rowcommand事件中使用row.FindControl时，索引超出范围错误

2 个答案: