How to get the URL (Host Name) of redirected page using C# and VB.Net in ASP.Net

Hi Amit,

Here is the sample i have checked and is working as per your explanation.

HTML Wa website

<asp:Button Text="Sending from Wa" runat="server" OnClick="Send" />

C# Wa website

protected void Send(object sender, EventArgs e)
{
    Response.Redirect("http://localhost:5621/205933_1/Wb.aspx");
}

C# Wb website

protected void Page_Load(object sender, EventArgs e)
{
    // To check UrlReferrer mostly if coming from any other page or from other website which is last visited
    if (Request.UrlReferrer != null)
    {
        Uri fullPath = new Uri(Request.UrlReferrer.AbsoluteUri);
        string hostName = fullPath.Host;
        string[] domains = hostName.Split(new char[] { '.' });
        string domain = domains[0]; //You will get the hostname i.e. wa
        if (domain.ToLower() == "localhost")
        {
            ClientScript.RegisterClientScriptBlock(this.GetType(), "message", "alert('Redirected from wa')", true);
        }
        else
        {
            ClientScript.RegisterClientScriptBlock(this.GetType(), "message", "alert('Redirected from other')", true);
        }
    }
}

Here i am checking with localhost. You need to check as per the webside url.