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

request isajaxrequest always false mvc 5
how to check if the request is from ajax in c#
httpcontext request isajaxrequest
filtercontext httpcontext request isajaxrequest in .net core
ajax httpcontext
helperpage.isajax in mvc

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#?

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


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");

[Resolved] How to identify requesting coming form ajax or not , How server is know that request is cumming form an ajax? /4392836/how-to- check-if-request-is-ajax-or-not-in-codebehind-asp-net-webforms. ASP.NET Core. This post is about detecting Ajax Requests in ASP.NET Core. In earlier versions of ASP.NET MVC, developers could easily determine whether the request is made via AJAX or not with IsAjaxRequest() method which is part of Request method. In this post I am implementing the similar functionlity in ASP.NET Core.

Try to check if the ScriptManager IsInAsyncPostBack :


Detecting AJAX Requests In ASP.NET MVC 6, Previously, ASP.NET MVC applications could easily check if a request was being made via AJAX, through the aptly named IsAjaxRequest() method which was an available method on the Request object, as shown below: public ActionResult YourActionName() { // Check if the request is an AJAX call. It is possible to implement ajax with PHP or with JSP or with ASP.NET or with many other technologies. Since we are learning .NET, in this article we will explain ajax in the context of C# .NET. The experienced developer will say that there are two possible ways to implement ajax in an ASP.NET web application.

Generally, you will need to test for the X-Requested-With header, ensuring that its value is 'XMLHttpRequest'. I'm not a C# developer (yet), but a quick google search says that in C# it goes something like this:

Request.Headers["X-Requested-With"] == "XMLHttpRequest";

Understand jQuery Ajax Function: Call Code-behind C# Method, There is no need to explain that ajax is one of the strong pillars of the future of web development. Using the jQuery ajax method we can call nearly any function (code behind) Step 1: Create an ajax function in an .aspx page. after a successful ajax request the success function will execute and after� To explain the jQuery Ajax in ASP.Net, we are going to use a simple webform – screenshot pasted below. You would enter any year in first text box; Click the ‘Call method using Ajax’ button. This will call ASP.Net code behind using Ajax ‘Leap Year’ or ‘Not a Leap Year’ will be populated in result text box based on your input

Yes, Request.IsAjaxRequest looks at the headers and the querystring for X-Requested-With, but it seems your jquery isn't sending the X-Requested-With header.

You can try and see what headers it is sending by using Fiddler, or alternatively just send it in the querystring by setting the POST url to


Ajax requests to ASP.NET WebForms WebMethods are not captured , NET WebForm page with a single server-side WebMethod, and the following WebForms v1.0.1 The entirety of the code-behind is: using System; us _Default" %> <html> <head> <title>WebForm Ajax Test</title> <script� How to check if request is ajax or not in codebehind - ASP.NET Webforms. Ask Question Asked 9 years, How do I check if this is a ajax request or not in C#?

Decorate your class with [WebMethod(EnableSession = true)]syntax like if you write the following function in code behind and call the same function from ajax call you will be sure.

[WebMethod(EnableSession = true)]
    public static void   getData(string JSONFirstData,string JSONSecondData, string JSONThirdData, string JSONForthData, ...)

in Ajax URL be like URL :'/Codebehind.aspx/getData'

Calling ASP.Net Code Behind using jQuery AJAX, Consider a scenario where you have many Fields in your Web Form and you want to Net code behind method using jQuery Ajax, you need to do the following This line is not needed if we are using input type=”button” html element. In success callback function, we are checking the returned value from � First, check if the input field is empty (str.length == 0). If it is, clear the content of the txtHint placeholder and exit the function. However, if the input field is not empty, do the following: Create an XMLHttpRequest object; Create the function to be executed when the server response is ready

Ajax call not hitting code behind c# method, NET/Web Forms/Ajax call not hitting code behind c# method Upon success the ajax call returns the html and JavaScript markup for the page i am on textStatus , errorThrown) { console.log("Request: " + XMLHttpRequest As far as i know, Console.Write will not work in ASP.NET. You can refer to this link� I have an ASP.NET 4.5 MVC application.It is a Single Page Application and Ajax calls are made on all click events .Glimpse Tab content gets refreshed only when PostBack happens.Is there any way that I can force the Glimpse Tabs data to get refreshed for each Ajax calls or on any click event rather than going and inspecting each ajax call

Detect ajax request in C#, Easier way to detect whether request is an ajax request. of request you can easily determine whether http request is ajax or not. To make it more reusable you can add this check as an extension method for HttpRequest class. Purpose of the code contained in snippets or available for download in this� ASP.NET and WCF AJAX Web Services and PageMethods natively don't accept urlencoded POST requests and so standard mechanisms for sending form POST data don't work directly with these services. However, with a few adjustments and using jQuery's .serizalizeArray() function it's possible to POST form data to ASP.NET Services and easily consume the form data.

What not to do in ASP.NET, and what to do instead, NET 2.0 to render presentation code that was customized for different devices use any of the following: AJAX, UpdatePanel, MVC action methods, Web API, or SignalR. Do not depend on request validation for securing your application NET classes that determine if the value matches allowed values. Bootstrap Tabs are a set of plain HTML elements and are not part of ASP.Net ViewState hence its Tab selection is lost whenever PostBack happens in ASP.Net. Solution Since the state of Bootstrap Tabs is not automatically maintained, we will need to maintain its state through programming.

  • That last line can be refactored to return request["X-Requested-With"] == "XMLHttpRequest" || request.Headers["X-Requested-With"] == "XMLHttpRequest";
  • added is callback support
  • Does this work for ajax requests that are triggered both from jquery ajax as well as from controls such as Update panels?
  • I'm not sure, therefore i wrote try;-)
  • JQuery is sending the X-Requested-With so if I check the headers per Karim79, it works. But there Request does not have a IsAjaxRequest property in the base page.
  • Ah, I see - i thought you meant it was always false. What version of are you using, and could we all see some code to reproduce your issue?