Using Ajax method call in Asp.net application

Question

i have this aspx view :

 jQuery('#addjob').click(function () {
            if ($('#metier').val().length > 0) {
                $('.taglist').append('<li style="line-height: 20px"><a href="" style="width:250px" >' + $('#metier').val() + '<span class="icon-remove"></span></a></li>');
                $.ajax({
                    type: "POST",
                    url: "JobsEdition.aspx/AjouterMetier",
                    data: "{'job': '" + $('#metier').val() + "'}",
                    success: function (msg) {
                        AjaxSucceeded(msg);
                    },
                    error: AjaxFailed
                });
                                              }
            $('#metier').val('');
        });

This is the result i got:

im2

In the code behin i put this method :

 public partial class JobsEdition : System.Web.UI.Page
    {
      List<string> jobs = new List<string>();
        [WebMethod()]
        public void AjouterMetier(string job)
        {
            if (job != "")
            {
                jobs.Add(job);
                Session["jobs"] = jobs;
            }

        }
}

I'm beginner in the use of ajax in Asp.net, so i had always the session variables Session["jobs"] null and the method AjouterMetier was never reached .

What is the error that I commited?
How can i fix it?

if you just type the url <myserver>/JobsEdition.aspx/AjouterMetier (where <myserver> is the url to the server your page is on) into your browser's address bar, do you get any ASPX or HTTP error? — Traveling Tech Guy
– Traveling Tech Guy, Commented May 4, 2014 at 18:27
A WebMethod need to be static. public static void AjouterMetier(string job) — Samuel
– Samuel, Commented May 4, 2014 at 18:30
@Samuel when i change it to static ==> i have to change the Jobs list also to static and i got this error session is unknown type — Lamloumi Afif
– Lamloumi Afif, Commented May 4, 2014 at 18:42

Samuel · Accepted Answer · 2014-05-04 19:31:49Z

To Webmethod work with a session you need anotate this way [WebMethod(enableSession: true)], Who your Webmethod is static you will need to change List to Static too, To acess a session in in a static method you need to refer a session how HttpContext.Current.Session.

I thik this will solve your problem

Try this

cs

static List<string> jobs = new List<string>();
[WebMethod(enableSession: true)]
public static void AjouterMetier(string job)
{

    if (job != "")
    {
        jobs.Add(job);
        HttpContext.Current.Session["jobs"] = jobs;
    }

}

js

jQuery('#addjob').click(function () {
            if ($('#metier').val().length > 0) {
                $('.taglist').append('<li style="line-height: 20px"><a href="" style="width:250px" >' + $('#metier').val() + '<span class="icon-remove"></span></a></li>');
                $.ajax({
                    type: "POST",
                    url: "Default.aspx/AjouterMetier",
                    data: "{'job': '" + $('#metier').val() + "'}",
                    contentType: 'application/json; charset=utf-8',
                    dataType: 'json',
                    success: function (msg) {
                    AjaxSucceeded(msg);
                },
                error: AjaxFailed
                });
            }
            $('#metier').val('');
        });

Domin8urMind · Accepted Answer · 2014-05-04 18:31:07Z

1

Since your adding items to the session:

Session["jobs"] = jobs;

You might want to initialize the variable by grabbing it from session prior. For instance:

public void AjouterMetier(string job)
{
  if (job != "")
  {
    jobs = (List<string>)Session["jobs"] ;
    if( jobs == null )
      jobs = new List<string>();

    jobs.Add(job);
    Session["jobs"] = jobs;
  }
}

answered May 4, 2014 at 18:31

Domin8urMind

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