Comments on: Using jQuery to directly call ASP.NET AJAX page methods

By: ASP.NET and Ajax. All about update panels, web methods, page methods and jQuery » Coding Still

Sun, 26 Feb 2012 15:40:31 +0000

[...] Using jQuery to directly call ASP.NET AJAX page methods [...]

By: Natasha

Natasha — Thu, 10 Nov 2011 09:07:27 +0000

Thanks Dave! Worked great :)

By: Joseph

Joseph — Thu, 03 Nov 2011 09:49:41 +0000

Great article, I was wondering if the Page method has to be static , this article answered my question.

By: How run jQuery Use HttpHandler | Data Milk

How run jQuery Use HttpHandler | Data Milk — Tue, 01 Nov 2011 12:59:17 +0000

[...] the original url syntax that you had used is typically used for invoking page methods – see this article if that’s what you want to achieve. Article source: [...]

By: Tim

Tim — Thu, 27 Oct 2011 08:02:54 +0000

Hi,
I have the following problem.
I have given an object as return value in the function, this does not work under Mono.
Now I’ve done it with a string, an this is the result (not works)

{“d”:”{\”TEST\”:\”0\”,\”TEST2\”:\”0\”,\”TEST3\”:false,\”TEST4\”:\”-\”,\”TEST5\”:\”-\”,\”Msg\”:\”yyy.\”,\”TEST6\”:\”zzz\”}”}

This works under windows (debug) with return a object but not under mono.
{“d”:{“__type”:”clsMyType”,”TEST”:”0″,”TEST2″:”0″,”TEST3″:false,”TEST4″:”-”,”TEST5″:”-”,”Msg”:”yyy.”,”TEST6″:”zzz”}}

Greetings

By: Asp.Net MVC compared to Asp.Net Web Forms - does it really matters?

Asp.Net MVC compared to Asp.Net Web Forms - does it really matters? — Tue, 11 Oct 2011 19:26:03 +0000

[...] support Ajax calls and actually that is all we need. If you stick with ASP.NET Web Forms then use web methods with the ScriptMethodAttribute. In case of ASP.NET MVC it is even simpler. Just define a controller [...]

By: Dave Ward

Dave Ward — Mon, 10 Oct 2011 16:02:34 +0000

You can change the TextBox’s value on the client-side to do that. If your TextBox’s ID were Result, like the div in the example, you could update its value like this:

      success: function(msg) {
        // Notice the change from .text() to .val()
        $("#Result").val(msg.d);
      }

By: David

David — Mon, 10 Oct 2011 15:51:57 +0000

I have implmeneted the test example and its updating the div fine however i want when i click on the link to update a textbox im using it for image selection in a cms i am building I am using tiny mce but as we delcare a web method i cant access the textbox control then is their any way round this as mcirosoft ajax simple is to bloted

By: Pshah

Pshah — Fri, 23 Sep 2011 12:03:21 +0000

Ok. As I mentioned, I do need to read session values, so instead of setting

<%@ Page EnableSessionState="False" %>

I set it to

<%@ Page EnableSessionState="Readonly" %>

which gives me the asynchronous behaviour. Although not satisfied but happy.

By: Pshah

Pshah — Fri, 23 Sep 2011 09:17:15 +0000

Thanks for the reply. Yes, the behaviour was fine after setting the Enablesessionstate to false in the Page directive. But then whats the alternative to this. For security, currently I am checking whether session is alive or not in all my webmethods.

By: Dave Ward

Dave Ward — Thu, 22 Sep 2011 17:01:45 +0000

That’s probably due to the ASP.NET Session. When a request has read/write access to the Session, ASP.NET processes those requests sequentially for a given session ID. That’s usually not noticeable for full postbacks, but can cause trouble when you’re making lots of smaller AJAX requests.

If you aren’t using the Session on this page, you can fix the problem by disabling it in the Page directive:

<%@ Page EnableSessionState="False" %>

By: Pshah

Pshah — Thu, 22 Sep 2011 16:35:32 +0000

I am using jquery ajax method to call a [WebMethod] which in an .aspx page.
But some how , the ajax call is behaving synchronously. I used fiddler to trace each request. here is my code:

JS ajax call to a web method

$(document).ready(function () {
 
 
            var param = "{'cp':'" + "1" + "', 'chartType' : " + 2 + "}";
            $.ajax({
                type: "POST",
                url: "ajaxhelp.aspx/GetChar",
                data: param,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
 
                success: function (msg) {
 
                    $("#contet").html("done");
 
                },
                error: function (XMLHttpRequest, textStatus, errorThrown) {
 
 
                }
            });
 
 
        });

And the code for the web method

 [WebMethod]
    public static string GetChar(string cp, int type)
    {
        string c = string.Empty; ;
        System.Threading.Thread.Sleep(10000);
        return "now";
 
    }

The behaviour from above code seems synchronous. The way I interpreted is , while the page is wating for the ajaxresponse, i am clicking on the other link on the same page ….which doesnt get redirected untill the ajaxresponse is done.

Any idea for this kind of wierd behaviour

By: Jorge

Jorge — Thu, 22 Sep 2011 16:30:19 +0000

Thank you, this worked very nice on my end!

By: Dave Ward

Dave Ward — Tue, 02 Aug 2011 21:30:49 +0000

You can relax IIS7′s default request filtering on *.ascx by also adding this in the web.config:

    >
      >
        >
           fileExtension=".ascx" />
           fileExtension=".ascx" allowed="true" />
        >
      >
    >

That doesn’t quite get it working right, but it might be a step in the right direction.

By: Ethan

Ethan — Tue, 02 Aug 2011 19:55:52 +0000

It still had problems there. After some research, it turns out that the ability to do this in IIS 6 wasn’t really meant to be there. So I guess that got nixed in IIS 7+.