request.querystring not found in static method

Question

I have static method in which I want to extract querystring value of the request. But it gives me null value when i am calling it from webmethod. Below is the some code

public static int GetLatestAssetId()
    {
        int itemid=0;
        if (HttpContext.Current.Request.QueryString["itemId"] != null)
        itemid = Convert.ToInt32(HttpContext.Current.Request.QueryString["itemId"]);
        return itemid;
    }

[WebMethod]

        public static string GetContactData()
        {

            GetLatestAssetId();
            return "Success"
        }

I am calling this webmethod from the ajax call.It works fine in page load but not in static method. How do I use this in static method. Please assist.

Solution 1

You do not have HttpContext.Current in your static method, because your static method has no current context.

It should work, when your static method is executed on a thread that is executing a Http request. To get around this limitation you should supply HttpContext.Current.Request.QueryString as a parameter to your static function form PageLoad event or where ever you are in your request life-cycle.

Solution 2

You have to pass the query string along with the call. this can be achieved from your ajax call.

   var qString = "?" + window.location.href.split("?")[1];
      $.ajax({ 
              url: "<aspx pagename>/<ajax method>" + qString,
              data: {},
              dataType: "json",
              contentType: "application/json; charset=utf-8",
              type: "POST",
              success: function(){},
              error: function () { },
              completed: function () { }
             });

Then server side variables can be accessed as normal.

string value = HttpContext.Current.Request.QueryString["itemId"].ToString();

Solution 3

int itemid =Convert.ToInt32(HttpContext.Current.Request.Form["itemid"]);

Solution 4

You only need to pass the query string as a parameter into the method of WebService.

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