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V24.2

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DxTreeList.GetTotalSummaryValue(ITreeListSummaryItem) Method

Gets a total summary item’s value.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
public object GetTotalSummaryValue(
    ITreeListSummaryItem item
)

#Parameters

Name Type Description
item ITreeListSummaryItem

The total summary item.

#Returns

Type Description
Object

The total summary value.

#Remarks

Specify the DisplayText property or handle the CustomizeSummaryDisplayText event to customize the summary display text.

The following code snippet applies italic formatting to all summary values:

@inject EmployeeTaskService EmployeeTaskService

<DxTreeList Data="TreeListData" KeyFieldName="Id" ParentKeyFieldName="ParentId">
    <Columns>
        <DxTreeListDataColumn FieldName="Name" Caption="Task" />
        <DxTreeListDataColumn FieldName="EmployeeName" />
        <DxTreeListDataColumn FieldName="StartDate" />
        <DxTreeListDataColumn FieldName="DueDate" />
        <DxTreeListDataColumn FieldName="Status" Caption="Progress" DisplayFormat="p0" />
    </Columns>
    <TotalSummary>
        <DxTreeListSummaryItem SummaryType="TreeListSummaryItemType.Count" FieldName="Name" />
        <DxTreeListSummaryItem SummaryType="TreeListSummaryItemType.Min" FieldName="DueDate" ValueDisplayFormat="y" />
        <DxTreeListSummaryItem SummaryType="TreeListSummaryItemType.Max" FieldName="DueDate" ValueDisplayFormat="y" />
        <DxTreeListSummaryItem SummaryType="TreeListSummaryItemType.Avg" FieldName="Status" />
    </TotalSummary>
    <ColumnFooterTemplate>
      @{
          var summaryItems = context.SummaryItems;
          if (summaryItems.Any()) {
              foreach (var i in summaryItems) {
                  @context.TreeList.GetTotalSummaryLabel(i)
                  <text>: </text>
                  <i>@context.TreeList.GetTotalSummaryValue(i)</i> <br />
              }
          }
      }
  </ColumnFooterTemplate>
</DxTreeList>

@code {
    List<EmployeeTask> TreeListData { get; set; }

    protected override void OnInitialized() {
        TreeListData = EmployeeTaskService.GenerateData();
    }
}

For more information about summaries in the TreeList component, refer to the following topic: Summary in Blazor TreeList.

See Also