.NET WebForms app - redirect

Jaak Ivask 1 Reputation point


I have an old WebForms e-commerce app.

  • We do not use the front-end part anymore, but in reality, the front-end part is available using the address office.company.com/.* We want to redirect this part to the new front-end URL www.company.com.
  • From the old app, we are using the office.company.com/administrator/ and  office.company.com/someASPX.aspx  file. These url's should not be redirected.

How to write redirects according to these conditions? From my searches, there are several possibilities:

  • app web.config file
  • IIS server configuration
  • ....


A set of technologies in the .NET Framework for building web applications and XML web services.
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  1. AgaveJoe 26,191 Reputation points

    Use the Application_BeginRequest handler in the Global.asax file.

    void Application_BeginRequest(Object source, EventArgs e)
        Uri url =  HttpContext.Current.Request.Url;
        if(url.AbsolutePath != "The page I'm looking for " | url.AbsolutePath != "The other page I'm looking for ")
            Response.Redirect("to the URL I want to redirect to");

    I used url.AbsolutePath but there are other properties that might be better for your situation. See the docs. https://learn.microsoft.com/en-us/dotnet/api/system.uri?view=net-8.0

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  2. Lan Huang-MSFT 25,471 Reputation points Microsoft Vendor

    Hi @Jaak Ivask,

    One general idea is to capture on BeginRequest the url in the Global.asax file, and redirect if necessary, here is an example:

    protected void Application_BeginRequest(Object sender, EventArgs e)
        HttpApplication app = (HttpApplication)sender;
        if (Request.RawUrl.StartsWith("http://b.com"))
            app.Response.Redirect(Request.RawUrl.Replace("http://b.com", "http://a.com"), true);            

    If you want to choose IIS rewriting, you can refer to the following solutions.


    Best regards,
    Lan Huang

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