jquery - How can I keep all html in session with webservice? -

I want to put that full html in my page in experiment with the webservice but the set up session throws this exception .

The object reference is not set for an example of an object.

My Functions

  [WebMethod (Description = "Gsetsession")] [ScriptMethod (UseHttpGet = false)] Public Zero Set Session (string HTML) {HttpContext.Current.Session ["html"] = html; } [WebMethod (Description = "GetSession")] [ScriptMethod (UseHttpGet = false)] Public string GetSession () {If (HttpContext.Current.Session ["html"]! = Null) {return HttpContext.Current.Session [" HTML "] ToString () .; } Other {return ""; }}  

In your web methods, make sure you enable session

[WebMethod (description = "get session", EnableSession = true)]