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 [Collapse]API Reference
  [Expand]DevExpress.Data.Linq
  [Expand]DevExpress.Web
  [Expand]DevExpress.Web.ASPxGauges
  [Expand]DevExpress.Web.ASPxGauges.Base
  [Expand]DevExpress.Web.ASPxGauges.Scripts
  [Expand]DevExpress.Web.ASPxHtmlEditor
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  [Expand]DevExpress.Web.ASPxScheduler
  [Expand]DevExpress.Web.ASPxScheduler.Commands.Dialogs
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  [Expand]DevExpress.Web.ASPxScheduler.Dialogs
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  [Expand]DevExpress.Web.ASPxSpellChecker
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  [Expand]DevExpress.Web.ASPxSpreadsheet
  [Expand]DevExpress.Web.ASPxSpreadsheet.Localization
  [Expand]DevExpress.Web.ASPxSpreadsheet.Scripts
  [Collapse]DevExpress.Web.ASPxTreeList
   [Collapse]ASPxTreeList Class
     ASPxTreeList Members
     ASPxTreeList Constructor
    [Expand]ASPxTreeList Properties
    [Collapse]ASPxTreeList Events
      AutoFilterCellEditorCreate Event
      AutoFilterCellEditorInitialize Event
      BeforeGetCallbackResult Event
      BeforeHeaderFilterFillItems Event
      CancelNodeEditing Event
      CellEditorInitialize Event
      ClientLayout Event
      CommandColumnButtonInitialize Event
      CustomCallback Event
      CustomColumnDisplayText Event
      CustomDataCallback Event
      CustomErrorText Event
      CustomFilterExpressionDisplayText Event
      CustomFilterNode Event
      CustomJSProperties Event
      CustomNodeSort Event
      CustomSummaryCalculate Event
      CustomUnboundColumnData Event
      EditingOperationCompleted Event
      ExportRenderBrick Event
      FilterControlColumnsCreated Event
      FilterControlCriteriaValueEditorCreate Event
      FilterControlCriteriaValueEditorInitialize Event
      FilterControlCustomValueDisplayText Event
      FilterControlOperationVisibility Event
      FilterControlParseValue Event
      FocusedNodeChanged Event
      HeaderFilterFillItems Event
      HtmlCommandCellPrepared Event
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      InitNewNode Event
      NodeCollapsed Event
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      NodeDeleted Event
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      NodeInserted Event
      NodeInserting Event
      NodeUpdated Event
      NodeUpdating Event
      NodeValidating Event
      PageIndexChanged Event
      PageSizeChanged Event
      ParseValue Event
      ProcessColumnAutoFilter Event
      ProcessDragNode Event
      ProcessOnClickRowFilter Event
      SearchPanelEditorCreate Event
      SearchPanelEditorInitialize Event
      SelectionChanged Event
      StartNodeEditing Event
      ToolbarItemClick Event
      VirtualModeCreateChildren Event
      VirtualModeNodeCreated Event
      VirtualModeNodeCreating Event
    [Expand]ASPxTreeList Methods
   [Expand]ASPxTreeListAutoFilterEventArgs Class
    ASPxTreeListAutoFilterEventHandler Delegate
   [Expand]ASPxTreeListBeforeHeaderFilterFillItemsEventArgs Class
    ASPxTreeListBeforeHeaderFilterFillItemsEventHandler Delegate
   [Expand]ASPxTreeListEditorCreateEventArgs Class
    ASPxTreeListEditorCreateEventHandler Delegate
   [Expand]ASPxTreeListEditorEventArgs Class
    ASPxTreeListEditorEventHandler Delegate
   [Expand]ASPxTreeListExporter Class
   [Expand]ASPxTreeListExportRenderBrickEventArgs Class
   [Expand]ASPxTreeListHeaderFilterEventArgs Class
    ASPxTreeListHeaderFilterEventHandler Delegate
   [Expand]ASPxTreeListOnClickRowFilterEventArgs Class
    ASPxTreeListOnClickRowFilterEventHandler Delegate
   [Expand]ASPxTreeListPrintSettings Class
    ASPxTreeListRenderBrickEventHandler Delegate
   [Expand]ASPxTreeListSearchPanelEditorCreateEventArgs Class
    ASPxTreeListSearchPanelEditorCreateEventHandler Delegate
   [Expand]ASPxTreeListSearchPanelEditorEventArgs Class
    ASPxTreeListSearchPanelEditorEventHandler Delegate
   [Expand]ASPxTreeListTemplateReplacement Class
   [Expand]PageMargins Class
   [Expand]PageSettings Class
   [Expand]ReadOnlyTreeListColumnCollection<T> Class
   [Expand]TreeListAlternatingNodeStyle Class
   [Expand]TreeListBinaryImageColumn Class
   [Expand]TreeListButtonEditColumn Class
   [Expand]TreeListCellStyle Class
   [Expand]TreeListCellTemplateContainerBase Class
   [Expand]TreeListCheckColumn Class
   [Expand]TreeListClientSideEvents Class
   [Expand]TreeListColorEditColumn Class
   [Expand]TreeListColumn Class
   [Expand]TreeListColumnCollection Class
   [Expand]TreeListColumnDateRangeCalendarSettings Class
   [Expand]TreeListColumnDateRangePeriodsSettings Class
   [Expand]TreeListColumnDateRangePickerSettings Class
   [Expand]TreeListColumnDisplayTextEventArgs Class
    TreeListColumnEditCaptionLocation Enumeration
   [Expand]TreeListColumnEditFormSettings Class
   [Expand]TreeListColumnEditorEventArgs Class
    TreeListColumnEditorEventHandler Delegate
   [Expand]TreeListColumnSettingsHeaderFilter Class
    TreeListColumnSortMode Enumeration
   [Expand]TreeListComboBoxColumn Class
   [Expand]TreeListCommandCellStyle Class
   [Expand]TreeListCommandColumn Class
   [Expand]TreeListCommandColumnApplyFilterButton Class
   [Expand]TreeListCommandColumnButton Class
   [Expand]TreeListCommandColumnButtonEventArgs Class
    TreeListCommandColumnButtonEventHandler Delegate
    TreeListCommandColumnButtonType Enumeration
   [Expand]TreeListCommandColumnCancelButton Class
   [Expand]TreeListCommandColumnClearFilterButton Class
   [Expand]TreeListCommandColumnCustomButton Class
   [Expand]TreeListCommandColumnCustomButtonCollection Class
   [Expand]TreeListCommandColumnUpdateButton Class
    TreeListCustomButtonVisibility Enumeration
   [Expand]TreeListCustomCallbackEventArgs Class
    TreeListCustomCallbackEventHandler Delegate
    TreeListCustomColumnDisplayTextEventHandler Delegate
   [Expand]TreeListCustomDataCallbackEventArgs Class
    TreeListCustomDataCallbackEventHandler Delegate
   [Expand]TreeListCustomErrorTextEventArgs Class
    TreeListCustomErrorTextEventHandler Delegate
   [Expand]TreeListCustomFilterNodeEventArgs Class
    TreeListCustomFilterNodeEventHandler Delegate
   [Expand]TreeListCustomizationWindowPopupSettings Class
   [Expand]TreeListCustomizationWindowPopupStyle Class
   [Expand]TreeListCustomJSPropertiesEventArgs Class
    TreeListCustomJSPropertiesEventHandler Delegate
   [Expand]TreeListCustomNodeSortEventArgs Class
    TreeListCustomNodeSortEventHandler Delegate
   [Expand]TreeListCustomSummaryEventArgs Class
    TreeListCustomSummaryEventHandler Delegate
   [Expand]TreeListCustomUnboundColumnDataEventArgs Class
    TreeListCustomUnboundColumnDataEventHandler Delegate
    TreeListDataCacheMode Enumeration
   [Expand]TreeListDataCellTemplateContainer Class
   [Expand]TreeListDataColumn Class
   [Expand]TreeListDateTimeColumn Class
   [Expand]TreeListDropDownEditColumn Class
   [Expand]TreeListEditCellTemplateContainer Class
   [Expand]TreeListEditDataColumn Class
   [Expand]TreeListEditFormTemplateContainer Class
    TreeListEditFormTemplateReplacementType Enumeration
    TreeListEditingOperation Enumeration
   [Expand]TreeListEditingOperationEventArgs Class
    TreeListEditingOperationEventHandler Delegate
    TreeListEditMode Enumeration
    TreeListExpandCollapseAction Enumeration
   [Expand]TreeListExportAppearance Class
   [Expand]TreeListExportStyles Class
   [Expand]TreeListExportSystemStyles Class
   [Expand]TreeListFilterBuilderPopupStyle Class
   [Expand]TreeListFilterCellStyle Class
   [Expand]TreeListFilterCellTemplateContainer Class
   [Expand]TreeListFilterControlPopupSettings Class
   [Expand]TreeListFilterNodeIterator Class
   [Expand]TreeListFilterRowStyle Class
   [Expand]TreeListFilterRowTemplateContainer Class
   [Expand]TreeListFooterCellTemplateContainer Class
   [Expand]TreeListFooterStyle Class
   [Expand]TreeListHeaderFilterPopupSettings Class
   [Expand]TreeListHeaderFilterPopupStyle Class
   [Expand]TreeListHeaderStyle Class
   [Expand]TreeListHeaderTemplateContainer Class
   [Expand]TreeListHtmlCommandCellEventArgs Class
    TreeListHtmlCommandCellEventHandler Delegate
   [Expand]TreeListHtmlDataCellEventArgs Class
    TreeListHtmlDataCellEventHandler Delegate
   [Expand]TreeListHtmlRowEventArgs Class
    TreeListHtmlRowEventHandler Delegate
   [Expand]TreeListHyperLinkColumn Class
   [Expand]TreeListImageColumn Class
   [Expand]TreeListImages Class
   [Expand]TreeListIndentStyle Class
   [Expand]TreeListIndentStyleBase Class
   [Expand]TreeListMemoColumn Class
   [Expand]TreeListNode Class
   [Expand]TreeListNodeCancelEventArgs Class
    TreeListNodeCancelEventHandler Delegate
   [Expand]TreeListNodeCollection Class
   [Expand]TreeListNodeDragEventArgs Class
    TreeListNodeDragEventHandler Delegate
   [Expand]TreeListNodeEditingEventArgs Class
    TreeListNodeEditingEventHandler Delegate
   [Expand]TreeListNodeEventArgs Class
    TreeListNodeEventHandler Delegate
   [Expand]TreeListNodeIterator Class
   [Expand]TreeListNodeStyle Class
   [Expand]TreeListNodeValidationEventArgs Class
    TreeListNodeValidationEventHandler Delegate
    TreeListPagerMode Enumeration
   [Expand]TreeListPagerPanelStyle Class
   [Expand]TreeListPopupControlSettings Class
   [Expand]TreeListPopupControlStyle Class
   [Expand]TreeListPopupControlStyles Class
   [Expand]TreeListPopupEditFormStyle Class
   [Expand]TreeListPreviewTemplateContainer Class
   [Expand]TreeListProgressBarColumn Class
    TreeListRowKind Enumeration
   [Expand]TreeListSettings Class
   [Expand]TreeListSettingsBase Class
   [Expand]TreeListSettingsBehavior Class
   [Expand]TreeListSettingsCookies Class
   [Expand]TreeListSettingsCustomizationWindow Class
   [Expand]TreeListSettingsDataSecurity Class
   [Expand]TreeListSettingsEditing Class
   [Expand]TreeListSettingsExport Class
   [Expand]TreeListSettingsFilterControl Class
   [Expand]TreeListSettingsLoadingPanel Class
   [Expand]TreeListSettingsPager Class
   [Expand]TreeListSettingsPopupEditForm Class
   [Expand]TreeListSettingsResizing Class
   [Expand]TreeListSettingsSearchPanel Class
   [Expand]TreeListSettingsSelection Class
   [Expand]TreeListSettingsText Class
   [Expand]TreeListSpinEditColumn Class
   [Expand]TreeListStyles Class
   [Expand]TreeListSummaryCollection Class
   [Expand]TreeListSummaryItem Class
   [Expand]TreeListTemplateContainerBase Class
   [Expand]TreeListTemplates Class
   [Expand]TreeListTextColumn Class
   [Expand]TreeListTimeEditColumn Class
   [Expand]TreeListTokenBoxColumn Class
   [Expand]TreeListToolbar Class
   [Expand]TreeListToolbarCollection Class
    TreeListToolbarCommand Enumeration
   [Expand]TreeListToolbarItem Class
   [Expand]TreeListToolbarItemClickEventArgs Class
    TreeListToolbarItemClickEventHandler Delegate
   [Expand]TreeListToolbarItemCollection Class
   [Expand]TreeListTreeLineStyle Class
   [Expand]TreeListVirtualModeCreateChildrenEventArgs Class
    TreeListVirtualModeCreateChildrenEventHandler Delegate
   [Expand]TreeListVirtualModeNodeCreatingEventArgs Class
    TreeListVirtualModeNodeCreatingEventHandler Delegate
   [Expand]TreeListVirtualNodeEventArgs Class
    TreeListVirtualNodeEventHandler Delegate
  [Expand]DevExpress.Web.ASPxTreeList.Internal
  [Expand]DevExpress.Web.ASPxTreeList.Localization
  [Expand]DevExpress.Web.ASPxTreeList.Scripts
  [Expand]DevExpress.Web.Captcha
  [Expand]DevExpress.Web.Data
  [Expand]DevExpress.Web.Internal
  [Expand]DevExpress.Web.Localization
  [Expand]DevExpress.Web.Mvc
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  [Expand]DevExpress.Web.Mvc.UI
  [Expand]DevExpress.Web.Office
  [Expand]DevExpress.Web.Office.Internal
  [Expand]DevExpress.Web.Rendering
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[Expand]ASP.NET Bootstrap Controls
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 End-User Documentation

ASPxTreeList.CustomUnboundColumnData Event

Enables data to be supplied to unbound columns.

Namespace:DevExpress.Web.ASPxTreeList
Assembly:DevExpress.Web.ASPxTreeList.v17.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type TreeListCustomUnboundColumnDataEventArgs containing data related to this event.

The following TreeListCustomUnboundColumnDataEventArgs properties provide information specific to this event.
Property Description
Column Gets the processed column.
Node Gets the node currently being processed.
Value Gets the edit value of the cell currently being processed.

Expanded Remarks

The CustomUnboundColumnData event is fired for unbound columns only. To create an unbound column, add a new data column to the Columns collection and set its TreeListDataColumn.UnboundType property to an appropriate value, based on the type of data the column is supposed to display. This column's TreeListDataColumn.FieldName property value must be unique and it must not refer to any field in the ASPxTreeList's underlying data source.

When the ASPxTreeList is loaded, it raises the CustomUnboundColumnData event for each data cell in unbound columns, allowing you to populate cells with data.

The currently processed cell is identified by the column and node, which can be determined via the TreeListCustomUnboundColumnDataEventArgs.Column and TreeListNodeEventArgs.Node properties, respectively.

The CustomUnboundColumnData event argument provides the TreeListNode.GetValue method, allowing you to get the value of the required cell.

Expanded Example

Assume that ASPxTreeList is bound to an "Order Details" data table (NWind data base), which contains "UnitPrice", "Quantity" and "Discount" fields. There is no field that represents the total sum, as this can be calculated manually as follows: UnitPrice*Quantity*(1-Discount). This example shows how to add an unbound column to the ASPxTreList control to represent the total sum of an order.

The image below shows the result.

Expanded See Also

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