AjaxOptions.OnBegin Property
Visual Studio 2010
Gets or sets the name of the JavaScript function to call immediately before the page is updated.
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)
Property Value
Type: System.StringThe name of the JavaScript function to call before the page is updated.
The JavaScript function is called by MVC after the HttpRequest object is instantiated but before it is invoked.
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