Use the session solution in the ashx file

If you want to secure your data, you can use session validation in ashx.
For example, if you use jquery in index.aspx to call back ashx data, then session["checked"]="true" in index.aspx page_load, then verify the existence of session in ashx.

However, the following steps are required to obtain the content of session in ashx:

(1) import the namespace

using System; 
using System.Web; 
using System.Web.SessionState;// The first 1 Step: import this namespace 

Implementation interface

publicclassMyWeb:IHttpHandler change this to read:

publicclassMyWeb:IHttpHandler,IRequiresSessionState// step 2: implement the interface and you can use Session as usual

Call method

HttpContext.Current.Session ["Session variable name "]