How to check if request is ajax or not in codebehind - ASP.NET Webforms

Question

I tried the Request.IsAjaxRequest but this does not exist in WebForms. I am making a JQuery ajax call. How do I check if this is a ajax request or not in C#?

Answer 1

You could create your own extension method much like the one in the MVC code

E.g.

public static bool IsAjaxRequest(this HttpRequest request) {     if (request == null)     {         throw new ArgumentNullException("request");     }      return (request["X-Requested-With"] == "XMLHttpRequest") || ((request.Headers != null) && (request.Headers["X-Requested-With"] == "XMLHttpRequest")); } 

HTHs,
Charles

Edit: Actually Callback requests are also ajax requests,

    public static bool IsAjaxRequest(this HttpRequest request)     {         if (request == null)         {             throw new ArgumentNullException("request");         }         var context = HttpContext.Current;         var isCallbackRequest = false;// callback requests are ajax requests         if (context != null && context.CurrentHandler != null && context.CurrentHandler is System.Web.UI.Page)         {             isCallbackRequest = ((System.Web.UI.Page)context.CurrentHandler).IsCallback;         }         return isCallbackRequest || (request["X-Requested-With"] == "XMLHttpRequest") || (request.Headers["X-Requested-With"] == "XMLHttpRequest");     } 

Answer 2

Try to check if the ScriptManager IsInAsyncPostBack :

ScriptManager.GetCurrent(Page).IsInAsyncPostBack