C# gridlookupedit选中内容重复还原操作

private void gridView1_ValidatingEditor(object sender, DevExpress.XtraEditors.Controls.BaseContainerValidateEditorEventArgs e)

{

var _Gdv = gridView1;

var _currentRowData = _Gdv.GetFocusedDataRow();

if (_currentRowData == null) return;

var view = gridView1;

if (_Gdv.ActiveEditor is GridLookUpEdit)
{
    if (_Gdv.FocusedColumn.View.EditingValue == null) return;

    var _Edit = _Gdv.ActiveEditor as GridLookUpEdit;
    var _SelectRowData = _Edit.Properties.View.GetFocusedDataRow();
    if (_SelectRowData == null) return;

    if (_Edit.Properties.Name == "glue_hzyy") // 会诊医院
    {
    // 记录旧值用于回滚
        var oldValue = _currentRowData["HZYYBM"];
        _currentRowData["HZYYBM"] = _SelectRowData["ITEM_CODE"];

        // 检查是否存在同一医院的统一会诊收费等级重复
        if (CheckDuplicateHospitalGrade(_currentRowData))
        {
          // 要加上这句，可能有部分操作会导致数据又刷新成新数据
            _currentRowData["HZYYBM"] = oldValue;
           _Edit.EditValue= oldValue;
           _Edit.IsModified=false;
           e.Value=oldValue;
		  MessageBox.Show("同一医院的同一会诊收费等级，只能存在一份！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
        else // 不重复直接赋值名称
        {
            _currentRowData["HZYYMC"] = _SelectRowData["ITEM_NAME"];
        }
    }
}

}