get host address of the page

Dim strURL As String= _
                "https://www.experts-exchange.com/Programming/Programming_Languages/Dot_Net/ASP_DOT_NET/askQuestion.jsp"
Dim strURL2 As String=Left(str, (Len(str)-15))

lblstr.Text=strURL2

or to do it dynamicaly use "LastIndexOf()" function which is available in both C# and VB.NET


Dim strURL As String= _
                "https://www.experts-exchange.com/Programming/Programming_Languages/Dot_Net/ASP_DOT_NET/askQuestion.jsp"
Dim int As Integer=str.LastIndexOf("/")
Dim strURL2 As String=Left(str, (int+1))

lblstr.Text=strURL2