VB.NET: 如何avoid/deny DataGridView SelectionChange 事件被处理？

Question

这是我的 DataGridView：

Me.DGV_InvoiceContainers.MultiSelect = False
Me.DGV_InvoiceContainers.ReadOnly = True
Me.DGV_InvoiceContainers.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect
...

它包含一列和多行。单击 cell/row（与所选的不同）时，将进行逻辑测试（在 MouseDown 事件处理程序下）以确保在更改选择之前满足所有条件。否则，SelectionChanged 事件可能不是 raised/handled，什么也不会发生（就像单击“取消”按钮时一样）。

可能吗？

已解决：

Private Sub DGV_InvoiceContainers_RowValidating(sender As Object, e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles DGV_InvoiceContainers.RowValidating
        If Me.CurrentInvoice.IsOpen Then
            If Me.CurrentInvoice.ChangesHaveBeenMade Then
                Dim dialogResult As New DialogResult
                dialogResult = MessageBoxA.Show("Do you want to save changes?", "Question", _
                                                MessageBoxAAutoFill.Title, _
                                                MessageBoxAButtons.YesNoCancel, Library.MessageBoxAMode.Question, MessageBoxAButtonsAlignment.Right, _
                                                MessageBoxA.DialogResultButtons.Button1, {"&Save", "Do &not save", "&Cancel"})
                Select Case dialogResult
                    Case Windows.Forms.DialogResult.Yes
                        Me.Reader.Close()
                        Me.SaveChanges()
                        Me.InvoiceContainerSelectionAllowed = True
                    Case Windows.Forms.DialogResult.No
                        Me.Reader.Close()
                        Me.InvoiceContainerSelectionAllowed = True
                    Case Else
                        Me.InvoiceContainerSelectionAllowed = False
                End Select
            Else
                Me.Reader.Close()
                Me.InvoiceContainerSelectionAllowed = True
            End If
            '
            If Me.InvoiceContainerSelectionAllowed Then
                Me.DisposeInvoiceData()
            End If
        Else
            Me.InvoiceContainerSelectionAllowed = True
        End If

        If Not Me.InvoiceContainerSelectionAllowed Then
            e.Cancel = True
            Return
        End If
End Sub

Answer 1

是的，这是可能的。您必须处理 RowValidating 事件并执行您的逻辑来检查您是否应该允许用户更改行。如果要取消，请使用 eventArgs.Cancel 属性并将其设置为 true。

Protected Overrides Sub OnRowValidating(e As DataGridViewCellCancelEventArgs)
If DialogResult.No = MessageBox.Show("Select a new record?", "New Record?", MessageBoxButtons.YesNo) Then
    e.Cancel = True
    Return
Else
    MyBase.OnRowValidating(e)
End If
End Sub

VB.NET: 如何avoid/deny DataGridView SelectionChange 事件被处理？

VB.NET: How to avoid/deny DataGridView SelectionChange event from being handled?

vb.net

events

datagridview

handler

selectionchanged