vb.net – 如果用户单击该行并将焦点从该行移开,则重置DataGridView空白行

如果用户单击DataGridView底部的空白行并将焦点从DataGridView移开,则现在单击的行处于指示对该行进行更改的状态.

是否可以告诉DataGridView取消标记该行是否被更改？

焦点离开DataGridView时是否可以重置此行？

我们使用以下事件处理程序来提醒用户,如果将Invoiced On留空：

Private Sub dataGridViewPayments_CellValidating(ByVal sender As Object, _
ByVal e As DataGridViewCellValidatingEventArgs) _
Handles DataGridViewPayments.CellValidating

    Dim headerText As String = _
        DataGridViewPayments.Columns(e.ColumnIndex).HeaderText

    ' Validate the Invoiced On cell and display the error if it's empty.
    '-------------------------------------------------------------------
    If (String.IsNullOrEmpty(e.FormattedValue.ToString()) And
        headerText.Equals("Invoiced On")) Then

        DataGridViewPayments.Rows(e.RowIndex).ErrorText = _
            "Please enter an Inoiced On date."

        e.Cancel = True
    End If
End Sub

看起来我们需要一种方法来阻止执行,如果用户只需单击网格然后单击表单中的其他位置.

你可以尝试这样的事情：

Private Sub dg_CellValidating(ByVal sender As Object, ByVal e As DataGridViewCellValidatingEventArgs) Handles dg.CellValidating
    Dim headerText As String = dg.Columns(e.ColumnIndex).HeaderText

    'Try this --------------------------------------------------------------
    Dim vClicked As Boolean = False
    If (Control.MouseButtons And MouseButtons.Left) = MouseButtons.Left Then
        vClicked = True
    End If
    '-----------------------------------------------------------------------

    'Validate the Invoiced On cell and display the error if it's empty.
    'And put vClicked here
    If Not vClicked AndAlso (String.IsNullOrEmpty(e.FormattedValue.ToString()) And headerText.Equals("Invoiced On")) Then

        dg.Rows(e.RowIndex).ErrorText = "Please enter an Inoiced On date."

        e.Cancel = True
    End If
End Sub

请告诉我它是否有帮助. =)