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#?
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6 Answers
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");
}
2 Comments
mattalxndr
That last line can be refactored to
return request["X-Requested-With"] == "XMLHttpRequest" || request.Headers["X-Requested-With"] == "XMLHttpRequest";
Imran Qadir Baksh - Baloch
added is callback support
Try to check if the ScriptManager IsInAsyncPostBack :
ScriptManager.GetCurrent(Page).IsInAsyncPostBack
2 Comments
DotnetDude
Does this work for ajax requests that are triggered both from jquery ajax as well as from controls such as Update panels?
Tim Schmelter
I'm not sure, therefore i wrote
try;-)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";
Comments
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
/whatever.aspx?x-requested-with=XMLHttpRequest
2 Comments
DotnetDude
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.
devrooms
Ah, I see - i thought you meant it was always false. What version of ASP.net are you using, and could we all see some code to reproduce your issue?
I created an extension that I use:
internal static bool IsAjaxRequest(this HttpRequestMessage request)
{
return request != null && request.Headers.Any(h => h.Key.Equals("X-Requested-With", StringComparison.CurrentCultureIgnoreCase) &&
h.Value.Any(v => v.Equals("XMLHttpRequest", StringComparison.CurrentCultureIgnoreCase)));
}
Comments
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, ...)
{
//code
}
in Ajax URL be like URL :'/Codebehind.aspx/getData'
