| Title | Detect changes to the editing text when the user changes a DataGridView's data in Visual Basic 2005 |
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| Description | This example shows how to detect changes to the editing text when the user changes a DataGridView's data in Visual Basic 2005. |
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| Keywords | DataGridView, edit, edit cell, TextChanged, Visual Basic 2005, VB 2005 |
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| Categories | Controls, VB.NET |
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Create a WithEvents variable of type DataGridViewTextBoxEditingControl. In the DataGridView's EditingControlShowing event handler, set this variable to the editing control.
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Private WithEvents m_EditingControl As _
DataGridViewTextBoxEditingControl
' Set the editing control so we can catch its events.
Private Sub DataGridView1_EditingControlShowing(ByVal _
sender As Object, ByVal e As _
System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) _
Handles DataGridView1.EditingControlShowing
Debug.WriteLine("Editing")
m_EditingControl = e.Control
End Sub
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Now you can catch the editing control's events. For example, the following code catches the TextChanged event and displays the current text as the user types it.
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' Unset the editing control so we no longer catch its
' events.
Private Sub m_EditingControl_LostFocus(ByVal sender As _
Object, ByVal e As System.EventArgs) Handles _
m_EditingControl.LostFocus
m_EditingControl = Nothing
Debug.WriteLine("Done")
End Sub
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When the editing control loses focus, set the variable to Nothing so you no longer catch the editing control's events.
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' Catch the editing control's TextChanged event.
Private Sub m_EditingControl_TextChanged(ByVal sender As _
Object, ByVal e As System.EventArgs) Handles _
m_EditingControl.TextChanged
Dim ctl As DataGridViewTextBoxEditingControl = _
DirectCast(sender, _
DataGridViewTextBoxEditingControl)
Debug.WriteLine(ctl.Text)
End Sub
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