Question

我正在使用以下代码来检测datagridview中的按键：

Private Sub DataGridView1_mt_EditingControlShowing(sender As Object, e As DataGridViewEditingControlShowingEventArgs) Handles DataGridView1_mt.EditingControlShowing
     AddHandler e.Control.KeyDown, AddressOf cell_Keydown
End Sub

Private Sub cell_Keydown(sender As Object, e As KeyEventArgs)
    If e.KeyCode = Keys.Space And CheckBox3.Checked = True Then
        e.Handled = True
        InputSimulator.SimulateTextEntry("_")
    End If
End Sub

基本上我需要用下划线替换每个空格。到目前为止，代码工作除了2个问题：

1）e.handled似乎不影响输出。在下划线前面总是有空格。如何防止它输入？

2）每次我更换单元格时都会添加一个新的处理程序，如果我正在编辑第五个单元格，则结果将是一个空格，后跟5个下划线。我怎么能避免这个？

由于

Answer 1

解决这个问题：

Dim eventhandleradded As Boolean = False

Private Sub DataGridView1_mt_EditingControlShowing(sender As Object, e As DataGridViewEditingControlShowingEventArgs) Handles DataGridView1_mt.EditingControlShowing
    If eventhandleradded = False Then
        AddHandler e.Control.KeyDown, AddressOf cell_Keydown
        eventhandleradded = True
    End If
End Sub

Private Sub cell_Keydown(sender As Object, e As KeyEventArgs)
    If e.KeyCode = Keys.Space And CheckBox3.Checked = True Then
        e.Handled = True
        e.SuppressKeyPress = True
        InputSimulator.SimulateTextEntry("_")
    End If
End Sub

检测datagridview中的按键

1 个答案: