如果GridViewRow被选中那么＆hellip;其他
好吧，这似乎应该很容易做到，但是我似乎无法正常工作而不会出错。我有一个IfThen语句，声明是否选择了一行，然后执行，否则显示消息。如果我选择一行，代码运行正常，但是当我尝试继续而不选择行时，我得到一个错误而不是我想要显示的消息。这是我正在尝试做的一个例子：
Protected Sub btnReplace(ByVal sender As Object, ByVal e As EventArgs)
Dim row As GridViewRow = device_list.SelectedRow
If (row.RowState Or DataControlRowState.Selected) > 0 Then
Message.Text = "You selected " & row.Cells(1).Text & "."
Else
Message.Text = "Please select a device."
End If
End Sub
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2 个回复
可扇胆
Dim row As GridViewRow = device_list.SelectedRow If Not row Is Nothing Then Message.Text = "You selected " & row.Cells(1).Text & "." Else Message.Text = "Please select a device." End IfIf device_list.SelectedIndex <> -1 Then Message.Text = "You selected " & device_list.SelectedRow.Cells(1).Text & "." Else Message.Text = "Please select a device." End If擅香
Protected Sub btnReplace(ByVal sender As Object, ByVal e As EventArgs) Dim row As GridViewRow = device_list.SelectedRow If (row <> Nothing Or DataControlRowState.Selected) > 0 Then Message.Text = "You selected " & row.Cells(1).Text & "." Else Message.Text = "Please select a device." End If End Sub