Table of Contents
  • Getting Started
  • EO.Pdf
  • EO.Web
  • EO.WebBrowser
  • EO.Wpf
  • Common Topics
  • Reference
    • .NET API Reference
      • EO.Base
      • EO.Base.UI
      • EO.Extensions
      • EO.Pdf
      • EO.Pdf.Acm
      • EO.Pdf.Contents
      • EO.Pdf.Drawing
      • EO.Pdf.Mvc
      • EO.Web
        • EO.Web
        • Classes
          • AJAXPostedFile Class
          • AJAXPostedFileList Class
          • AJAXUploader Class
          • AJAXUploaderProgressDialog Class
          • ASPXToPDF Class
          • BaseMenuItem Class
          • BaseMenuItemGroup Class
          • BaseNavigator Class
          • BorderImages Class
          • ButtonColumn Class
          • Calendar Class
          • CalendarDay Class
          • Callback Class
          • CallbackEventArgs Class
          • CallbackPanel Class
          • CallbackTrigger Class
          • CallbackTriggerCollection Class
          • Captcha Class
          • CheckBoxColumn Class
          • ClientTemplate Class
          • ColorPicker Class
          • ComboBox Class
          • Consts Class
          • ContextMenu Class
          • Control Class
          • ControlFrame Class
          • CustomColumn Class
          • CustomItem Class
          • DataBinding Class
          • DataBindingCollection Class
          • DataBoundControl Class
          • DateCollection Class
          • DatePicker Class
          • DateTimeColumn Class
          • DayRenderEventArgs Class
          • DefaultClientTemplateAttribute Class
          • DeleteCommandColumn Class
          • DesignOptions Class
          • Dialog Class
          • Downloader Class
          • DownloadEventArgs Class
          • DynamicDownloadContent Class
          • EditableLabel Class
          • EditCommandColumn Class
          • Editor Class
          • EditorDialogContent Class
          • EditorDialogContentCollection Class
          • EditorDialogTemplate Class
          • EditorDialogTemplateCollection Class
          • EditorStyle Class
          • EditorStyleCollection Class
          • EditorTabButtonStyles Class
          • Effect Class
          • ElementPaddings Class
          • ElementStyle Class
          • Emoticon Class
          • FileExplorer Class
          • FileExplorerEventArgs Class
          • FileExplorerHolder Class
          • Floater Class
          • Flyout Class
          • FontInfo Class
          • Grid Class
          • GridCell Class
          • GridCellCollection Class
          • GridColumn Class
          • GridColumnCollection Class
          • GridColumnEventArgs Class
          • GridCommandEventArgs Class
          • GridItem Class
          • GridItemCollection Class
          • GridItemEventArgs Class
          • GridItemStyleSet Class
          • GridItemStyleSetCollection Class
          • ImageButtonInfo Class
          • ImageInfo Class
          • ImageZoom Class
          • InlineStyle Class
          • ListBox Class
          • ListBoxItem Class
          • ListBoxItemCollection Class
          • ListBoxItemContainer Class
          • ListItemEventArgs Class
          • LookItemCollection Class
          • MaskedEdit Class
          • MaskedEditColumn Class
          • MaskedEditSegment Class
          • MaskedEditSegmentCollection Class
          • MaskedEditValidator Class
          • Menu Class
          • MenuGroup Class
          • MenuItem Class
          • MenuItemCollection Class
          • MenuItemImages Class
          • MenuLookItemCollection Class
          • MsgBox Class
          • MsgBoxButton Class
          • MultiPage Class
          • MultiPageEventArgs Class
          • NavigationItem Class
          • NavigationItemCollection Class
          • NavigationItemEventArgs Class
          • NavigationItemGroup Class
          • NavigationItemImages Class
          • NavigationItemText Class
          • PageContextMenu Class
          • PageView Class
          • PageViewCollection Class
          • PathMapping Class
          • PathMappingCollection Class
          • PopupCalendar Class
          • ProgressBar Class
          • ProgressTaskEventArgs Class
          • RangeSlider Class
          • Rating Class
          • RowNumberColumn Class
          • Runtime Class
          • ScriptEvent Class
          • ScriptManager Class
          • Slide Class
          • SlideItem Class
          • SlideItemCollection Class
          • SlideItemEventArgs Class
          • SlideMenu Class
          • Slider Class
          • SliderBase Class
          • SliderLabel Class
          • SliderLabelCollection Class
          • SpecialLookIDs Class
          • SpellChecker Class
          • SpellCheckerDialog Class
          • SpellCheckerEventArgs Class
          • Splitter Class
          • SplitterPane Class
          • StaticColumn Class
          • TabItem Class
          • TabItemCollection Class
          • TabItemGroup Class
          • TabLookItemCollection Class
          • TabStrip Class
          • TemplatedPopup Class
          • TextBoxColumn Class
          • ToolBar Class
          • ToolBarEventArgs Class
          • ToolBarItem Class
          • ToolBarItemCollection Class
          • ToolTip Class
          • TreeLookNodeCollection Class
          • TreeNode Class
          • TreeNodeCheckStateChangedEventArgs Class
          • TreeNodeCollection Class
          • TreeNodeGroup Class
          • TreeNodeMovedEventArgs Class
          • TreeNodeRenameEventArgs Class
          • TreeView Class
          • TreeViewCheckBoxImages Class
          • TreeViewLineImages Class
          • TreeViewMargin Class
          • WebControl Class
          • WebControlBase Class
        • Structures
        • Enumerations
        • Delegates
      • EO.WebBrowser
      • EO.WebBrowser.DOM
      • EO.WebEngine
      • EO.WinForm
      • EO.Wpf
      • EO.Wpf.Gauge
      • EO.Wpf.Gauge.Shapes
      • EO.Wpf.Primitives
      • EO.Wpf.Themes.Aero
      • EO.Wpf.Themes.Classic
      • EO.Wpf.Themes.Luna
      • EO.Wpf.Themes.Metro
      • EO.Wpf.Themes.Royale
    • JavaScript API Reference
Table of Contents
Callback Class

Callback control delivers capability to perform server side postback through AJAX (Asynchronous JavaScript and XML) call back request without reloading the whole page.

Namespace: EO.Web
Assembly: EO.Web (in EO.Web.dll)

Inheritance Hierarchy

System.Object
   System.Web.UI.Control
      EO.Web.Control
         EO.Web.Callback

Syntax
C#
Copy
 public class Callback : Control
Remarks

The main purpose of Callback is to process request on server-side without reloading the entire page. Any control that posts back to server can use Callback to handle its postback request.

Note   By using Callback control, in callback's event handler, you cannot update the web page. Use CallbackPanel if you intend to update the web page.

To specify a Callback to handle a control's postback request, simply set the Callback's Triggers property. Triggers property maintains a collection of CallbackTrigger controls and each in turn contains information of the control that could trigger this callback. Information includes control's client ID and input parameter. For example, if you want to specify a Callback to handle an ASP.NET button's click event, specify the button's client ID in CallbackTrigger's ControlID property, then add this CallbackTrigger into Callback's Triggers property.

Please see CallbackTrigger for details.

See Also