在WPF的DATAGRID中快速点击出现在ADDNEW或EDITITEM事务过程不允许DEFERREFRESH

        /// <summary>
/// 鼠标按下事件，处理快速点击发生deferRefresh异常的处理
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
        private void dtgSchemeApp_PreviewMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
if (IsUnderTabHeader(e.OriginalSource as DependencyObject))
                CommitTables(this.dtgSchemeApp);
        }

private bool IsUnderTabHeader(DependencyObject control)
        {
if (control is TabItem)
return true;
            DependencyObject parent = VisualTreeHelper.GetParent(control);
if (parent == null)
return false;
return IsUnderTabHeader(parent);
        }

private void CommitTables(DependencyObject control)
        {
if (control is DataGrid)
            {
                DataGrid grid = control as DataGrid;
                grid.CommitEdit(DataGridEditingUnit.Row, true);
return;
            }
int childrenCount = VisualTreeHelper.GetChildrenCount(control);
for (int childIndex = 0; childIndex < childrenCount; childIndex++)
                CommitTables(VisualTreeHelper.GetChild(control, childIndex));
        }