如果每次选择项都不一样，则响应下面事件来实现
Private Sub xDataGridView_EditingControlShowing(sender As Object, e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles xDataGridView.EditingControlShowing
If (TypeOf e.Control Is DataGridViewComboBoxExEditingControl) Then
If (xDataGridView.CurrentCell.ColumnIndex = mRunAfterColumn.Index) Then
If (Not xDataGridView.CurrentCell.ReadOnly) Then
Dim pControl As DataGridViewComboBoxExEditingControl = CType(e.Control, DataGridViewComboBoxExEditingControl)
pControl.DataSource = getRunAfterColumnChildrenSelect(xDataGridView.CurrentCell.RowIndex) pControl.SelectedIndex = pControl.FindStringExact(CStr(xDataGridView.CurrentCell.Value))
End If
End If
End If
如果选择项是固定不变的，可以在Column级别赋值
Dim pSelectList As List(Of EnrafCommand) = mGaugeConfig.mInnerExtend.enrafCommandConfig.ToList()
mRunAfterColumn.DataSource = pSelectList
此控件不支持
‘pControl.DisplayMember = EnrafCommand.displayMember
‘pControl.ValueMember = EnrafCommand.valueMember
如需要在界面上显示正确的内容，需要对像重载ToString()
如果选择项会丢失，则要设置列的属性DropDownStyle为DropDown（推荐）或Simple
一般的Combox，在选择项丢失时，会不断抛出错误，导致程序无法正常执行下去
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