vb.net 如何检测VB.NET中数据网格的变化
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How to detect changes of data grid in VB.NET
提问by Geo Paul
I have a datagrid in VB.NET class. The cells are editable. Is there any way to trigger a function when each of the cells are edited?
我在 VB.NET 类中有一个数据网格。单元格是可编辑的。当编辑每个单元格时，有什么方法可以触发功能吗？
回答by Steve
Yes, the CellValueChanged Event: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged.aspx
是的，CellValueChanged 事件：http: //msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged.aspx
Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
'do something
End Sub
EDIt as per your comment: Yes you could save the current value to a class level variable on BeginEdit and retreieve it in the CellValueChanged event:
根据您的评论编辑：是的，您可以将当前值保存到 BeginEdit 上的类级别变量，并在 CellValueChanged 事件中检索它：
Private cellValue As String = String.Empty
Private Sub DataGridView1_CellBeginEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles DataGridView1.CellBeginEdit
cellValue = DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value.ToString
End Sub
Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
MessageBox.Show("row index: " & e.RowIndex & Environment.NewLine & "old value: " & cellValue)
End Sub
回答by Steve
But CellValueChanged event return the message every keydown action even you havent completed to type, this fact is irritating.
但是 CellValueChanged 事件即使您还没有完成输入，也会在每个按键操作时返回消息，这个事实令人恼火。
