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  [Expand]DevExpress.Data.Linq
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  [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.ASPxSpreadsheet.Localization
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  [Expand]DevExpress.Web.ASPxTreeList
  [Expand]DevExpress.Web.ASPxTreeList.Internal
  [Expand]DevExpress.Web.ASPxTreeList.Localization
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   [Expand]MVCxClientBeforeExportRequestEventArgs Class
    MVCxClientBeforeExportRequestEventHandler Delegate
   [Expand]MVCxClientBeginCallbackEventArgs Class
    MVCxClientBeginCallbackEventHandler Delegate
   [Expand]MVCxClientCalendar Class
   [Expand]MVCxClientCallbackPanel Class
   [Expand]MVCxClientCardView Class
   [Expand]MVCxClientChart Class
   [Expand]MVCxClientComboBox Class
   [Expand]MVCxClientDataView Class
   [Expand]MVCxClientDateEdit Class
   [Expand]MVCxClientDockManager Class
   [Expand]MVCxClientDockPanel Class
   [Expand]MVCxClientDocumentViewer Class
   [Expand]MVCxClientFileManager Class
   [Expand]MVCxClientGlobalBeginCallbackEventArgs Class
    MVCxClientGlobalBeginCallbackEventHandler Delegate
   [Expand]MVCxClientGlobalEvents Class
   [Expand]MVCxClientGridView Class
   [Expand]MVCxClientHtmlEditor Class
   [Expand]MVCxClientImageGallery Class
   [Expand]MVCxClientListBox Class
   [Expand]MVCxClientNavBar Class
   [Expand]MVCxClientPageControl Class
   [Expand]MVCxClientPivotGrid Class
   [Expand]MVCxClientPopupControl Class
   [Expand]MVCxClientReportDesigner Class
   [Expand]MVCxClientReportDesignerSaveCommandExecutedEventArgs Class
    MVCxClientReportDesignerSaveCommandExecutedEventHandler Delegate
   [Expand]MVCxClientReportViewer Class
   [Expand]MVCxClientRichEdit Class
   [Expand]MVCxClientRoundPanel Class
   [Expand]MVCxClientScheduler Class
   [Expand]MVCxClientSchedulerTemplateToolTip Class
   [Expand]MVCxClientSchedulerToolTipDisplayingEventArgs Class
    MVCxClientSchedulerToolTipDisplayingEventHandler Delegate
   [Expand]MVCxClientSpreadsheet Class
   [Expand]MVCxClientTokenBox Class
   [Collapse]MVCxClientTreeList Class
     MVCxClientTreeList Members
     MVCxClientTreeList Constructor
    [Collapse]MVCxClientTreeList Events
      BeginCallback Event
    [Expand]MVCxClientTreeList Methods
   [Expand]MVCxClientTreeView Class
   [Expand]MVCxClientUploadControl Class
   [Expand]MVCxClientUtils Class
   [Expand]MVCxClientVerticalGrid Class
   [Expand]MVCxClientWebDocumentViewer Class
   [Expand]MVCxSchedulerToolTipType Class
  [Expand]DevExpress.Web.Mvc.UI
  [Expand]DevExpress.Web.Office
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 End-User Documentation

MVCxClientTreeList.BeginCallback Event

Occurs when a callback for server-side processing is initiated.

Namespace:DevExpress.Web.MVC.Scripts
Assembly:JavaScript

Expanded Syntax

Expanded Event Data

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

The following MVCxClientBeginCallbackEventArgs properties provide information specific to this event.
Property Description
command Gets a command name that identifies which client action forced a callback to be occurred.
customArgs Gets an object containing specific information (if any, as name/value pairs) that should be passed as a request parameter from the client to the server side for further processing.

Expanded Remarks

The BeginCallback and ASPxClientHtmlEditor.EndCallback events can be used to perform specific client-side actions (for example, to display and hide an explanatory text or picture) while a callback is being processed on the server side.

By handling the BeginCallback event, you can pass any required information from the client to the server via the MVCxClientBeginCallbackEventArgs.customArgs property.

Expanded See Also

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