WPF DEV gridcontrol 自定义计算列(TotalSummary)

　　　　　/// <summary>

        /// 自定义计算列

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void user_GridControl_CustomSummary(object sender, CustomSummaryEventArgs e)

        {

            try

            {foreach (var item in dic)

                    if (item.Key == ((GridSummaryItem)e.Item).FieldName)

                        if (e.IsTotalSummary)

                            if (e.SummaryProcess == CustomSummaryProcess.Start)

                                e.TotalValue = item.Value;

            }

            catch (Exception ex)

            {

            }

        }

//生成数据的时候

user_GridControl.TotalSummary.Clear();

foreach (DataColumn item in source.Columns)

    user_GridControl.TotalSummary.Add(new GridSummaryItem()

      {

        SummaryType = DevExpress.Data.SummaryItemType.Custom,

        FieldName = item.ColumnName,

        DisplayFormat = item.ColumnName + "的和:{0}"

      });

XAML

<dxg:GridControl x:Name="user_GridControl"

                 CustomSummary="user_GridControl_CustomSummary"

                 FilterChanged="user_GridControl_FilterChanged"

                 AutoExpandAllGroups="True"

                 AutoPopulateColumns="True"

                 ScrollViewer.CanContentScroll="True"

                 AllowColumnMRUFilterList="True"

                 dx:ScrollBarExtensions.ScrollBarMode="TouchOverlap"

                 Margin="5" Grid.Row="1">

            <dxg:GridControl.GroupSummary>

                <dxg:GridSummaryItem SummaryType="Count" />

            </dxg:GridControl.GroupSummary>

            <dxg:GridControl.View>

                <dxg:TableView AllowEditing="False"

                               BestFitMode="VisibleRows"

                               WheelScrollLines="1"

                               RowMinHeight="30" x:Name="SummaryTable"

                               AllowMoveColumnToDropArea="False" ShowGroupPanel="False"

                               AllowGrouping="True"

                               AllowBandMoving="True" AllowResizing="True"

                               AllowBestFit="True"

                               ShowSearchPanelMode="Always"

                               ShowIndicator="True"

                               ShowAutoFilterRow="True"

                               NavigationStyle="Row" RowAnimationKind="Custom"

                               WaitIndicatorType="Default"

                               ShowFixedTotalSummary="False" AllowScrollAnimation="True"

                               AllowFixedGroups="True" ColumnFilterPopupMode="Default"

                               AllowChangeBandParent="False"

                               AllowPerPixelScrolling="True"

                               ShowTotalSummary="True"

                               ShowFilterPanelMode="ShowAlways"

                               >

                    </dxg:TableView>

                </dxg:GridControl.View>

            </dxg:GridControl>