Question

I got a “normal” ascx-Page which contains HTML-Parts as well as code behind. These elements should all be shown in normal conditions (works).

Now I want to be able to set a request-parameter which causes the page zu render differently. Then it sends the information on that page not human-readable but for a machine:

 string jsonProperty = Request["JSonProperty"];
                if (!string.IsNullOrEmpty(jsonProperty))
                {                    
                    Response.Clear();
                    Response.Write(RenderJSon());
                  //  Response.Close();
                    return;

This code is inside the Page_PreRender.
Now my problem is:The string is correctly sent to the browser but the “standard” html-content is still rendered after that.

When I remove the “Response.Close();” Comment I receive an “ERR_INVALID_RESPONSE”

Any clue how to solve this without creating an additional Page?

Answer 1

Try adding Response.End()

Sends all currently buffered output to the client, stops execution of the page, and raises the EndRequest event.

Also, as @Richard said, add

context.Response.ContentType = "application/json";