Pass string from Global.asax to Controller

Question

Hi,

 

I am trying to pass string from Global.asax Application_BeginRequest to MVC Controller page.

 

While passing string, checking the form input and validating data in Global.asax

 

Application_BeginRequest method. If any illegal charactors found, I have to redirect to the same page with error message what they entered wrong. I don't want to display the error message in URL.

 

So, I tried through HttpContext.Current.Items["Key"]="test message" and session too.

 

Please help me, whats wrong with code and how to pass a string value to controller from Global.asax?

 

Thanks in Advance.

 

Global.asax Code:

protected void Application_BeginRequest()
{
   if (Request.HttpMethod.Equals("post", StringComparison.InvariantCultureIgnoreCase))
   {
      var keys = Request.Form.AllKeys;
      foreach (var obj2 in keys)
      {
         var a = Request.Form.Get(obj2);
         string illChar = UnSafeChar(a);
         if(!string.IsNullOrEmpty(illChar))
         {
            HttpContextBase currentContext = new HttpContextWrapper(HttpContext.Current);
            UrlHelper urlHelper = new UrlHelper(HttpContext.Current.Request.RequestContext);
            RouteData routeData = urlHelper.RouteCollection.GetRouteData(currentContext);
            string ctlr = routeData.Values["controller"] as string;
            string act = routeData.Values["action"] as string;
            //The below line sending null to controller
            //HttpContext.Current.Items["AppErr"] = "You have entered illegal characters : " + illChar.ToString();
            //The below session also not working
            //HttpContext.Current.Session["AppErrSession"] = "This is test message session";
             var tempUrlHelper = new UrlHelper(HttpContext.Current.Request.RequestContext);
            Response.Redirect(tempUrlHelper.Action(act, ctlr));
            }
         }
    }
}