How to use short URL to redirect to correct web page?

Using short URL method of ww.mydomainname/H/5555 which creates error so in Global.asax added code
which takes shorten URL and redirects to correct page with original parameter

 string cUrl = HttpContext.Current.Request.Url.PathAndQuery;

            if(cUrl.Contains("/H/"))
            {
                string cBeginDelim = "/H/";
                int nbpos = cUrl.IndexOf(cBeginDelim) + 1;
                string cParameter = cUrl.Substring(nbpos + cBeginDelim.Length - 1);
                string cPage = "~/downloadarea/correctpagerequired.aspx?Idparameter=" + cParameter;
                Server.ClearError();
                Response.Clear();
                Response.Redirect(cPage, true);

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the problem is when it redirects to new page it retains the prefix of "/H/"

so intead of going to;
downloadarea/correctpagerequired.aspx?Idparameter=5555
it redirects to page;
/H/downloadarea/correctpagerequired.aspx?Idparameter=" + cParameter

the /H/ at beginning of the URL creates another error so it never redirects to the correct page?
stephenwildeAsked:
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stephenwildeAuthor Commented:
Solved

Last line of code change false to true

Response.Redirect(cPage, false);

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then it redirects

 if anybody has other better ways to redirect using / (forward slash) in URL please post.
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stephenwildeAuthor Commented:
Baffling it works on Development machine changing URL manually to ;

http://localhost:49562/H/5555 

it redirect correctly using code in Application_Error in global.asax.cs

but on live web server;

www.mydomainname.com/H/5555 

comes up with Error 404 page!


Any help please would be gratefully appreciated.
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stephenwildeAuthor Commented:
Looking into via Google searches - it may be something do with only asking for a no existent folder and no file name
so for that reason it may not enter Application_Error in global.asax.cs?
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Manoj PatilSr. Software EngineerCommented:
Hey try this

void Application_BeginRequest(object sender, EventArgs e)
{
 // Get the current path
 string CurrentURL_Path = Request.Path.ToLower();

 if (CurrentURL_Path.StartsWith("/H/"))
 {
   CurrentURL_Path = CurrentURL_Path.Trim("/");
   string NewsID = CurrentPath.Substring(CurrentPath.IndexOf("/"));
   HttpContext MyContext = HttpContext.Current;
   MyContext.RewritePath("/downloadarea/correctpagerequired.aspx?Idparameter=" +  ID);
 }
}

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Manoj PatilSr. Software EngineerCommented:
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stephenwildeAuthor Commented:
Thank you for your posted code and link provided
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stephenwildeAuthor Commented:
Although it redirects to the page in the code
 MyContext.RewritePath("/downloadarea/correctpagerequired.aspx?Idparameter=" +  ID);

the URL is still showing in the browser
/H/234

and the page referred to fails to load images it uses as the paths are all wrong

it there a way to change the path to the root and browser displayed url to;
/downloadarea/correctpagerequired.aspx?Idparameter=" +  ID
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Manoj PatilSr. Software EngineerCommented:
Actually while loading the images you need to initiate it from the root by just putting "/" before path starts

Eg.

if your imagepath is images/logo.png then you need to make it like /images/logo.png
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