如何在VB.NET中检测数据网格的变化

Question

我在VB.NET类中有一个datagrid。细胞是可编辑的。有没有办法在编辑每个单元格时触发一个函数？

Answer 1

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根据您的评论： 是的，您可以将当前值保存到BeginEdit上的类级变量，并在CellValueChanged事件中将其保留：

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

Answer 2

但CellValueChanged事件返回每个keydown动作的消息，即使你还没有完成输入，这个事实很烦人。