.NET WebForms app - redirect

Question

Hello,

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
• ....

 

Answer 1

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

Answer 2

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);            
        return;
    }       
}

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

https://stackoverflow.com/a/9332671

Best regards,
Lan Huang

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