Returning a string from a http GET using asp.net web forms project

Answer 1

You could write a generic handler:

public class CustomJsHandler : System.Web.IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/javascript";
        context.Response.Write("alert('Hello world');");
    }

    public bool IsReusable
    {
        get
        {
            return true;
        }
    }
}

and then specify the address of this handler:

<script type="text/javascript" src="/customjshandler.ashx"></script>