How to check the page is loaded directly or being redirected from another page in asp.net

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I have one page of brand master which i can load directly or i can be redirected through other page.
when the page is redirected it should hide the header which its containing and when it is loaded directly it should show the header part also
but when i am trying to do something like this

C#

protected void Page_Load(object sender, EventArgs e)
   {
       if (!IsPostBack)
       {
           var MasterPage = Master;
           if (!string.IsNullOrEmpty(Request.UrlReferrer.ToString()))
           {
               MasterPage.FindControl("Admin_Header1").Visible = false;
               MasterPage.FindControl("tdLeft").Visible = false;
               MasterPage.FindControl("footertable").Visible = false;
           }
       }
   }

and trying to open the page directly when its throwing an error because request.urlreffer is null..

can anyone please help me out with this...

Posted 31-Aug-15 3:38am

Member 11864926

Updated 31-Aug-15 3:45am

Thanks7872

v2

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arindamrudra · Answer 1 · 2015-08-31T03:59:00

You should not use .ToString() over there. Instead of that you can use:

C#

if (!string.IsNullOrEmpty(Request.UrlReferrer))

Or you could have use

C#

Convert.ToString(Request.UrlReferrer)

It handles null value and that is the main difference between ToString() and Convert.ToString().

Use the below code to resolve your purpose:

C#

if (!IsPostBack)
        {
            var MasterPage = Master;
            var a = Request.UrlReferrer;
            string url = HttpContext.Current.Request.Url.AbsoluteUri;
            if (a != null && url == "your Required url")
            {
                if (MasterPage != null)
                {
                    MasterPage.FindControl("Admin_Header1").Visible = false;
                    MasterPage.FindControl("tdLeft").Visible = false;
                    MasterPage.FindControl("footertable").Visible = false;
                }
            }
        }

F-ES Sitecore · Answer 2 · 2015-09-01T23:29:00

Change

C#

if (!string.IsNullOrEmpty(Request.UrlReferrer.ToString()))

to

C#

if (Request.UrlReferrer != null)

however this is going to work on a page by page basis which might not be what you want. Eg if you come to the site via another site then the header will be hidden. However if I press [enter] in address bar to reload the page then the header will show again. If you want to remember how the site was first loaded and stick to that configuration then add an event in your global.asax.cs file

C#

void Session_Start(object sender, EventArgs e)
{
    if (Request.UrlReferrer == null)
    {
        Session["Direct"] = true;
    }
    else
    {
        Session["Direct"] = false;
    }
}

then in your code

C#

if ((bool)Session["Direct"])
{
    // direct so show header
}
else
{
    // redirected so hide header
}

How to check the page is loaded directly or being redirected from another page in asp.net

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