如何让用户在页面加载时引用URL？ （VB）

Question

What can i used to get a visiting users referal URL?

I know about retrieving IP address etc but need to log a referal URL (eg google) on load.

Answer 1

    Dim sUrlReferrer As String = String.Empty

    If Not IsPostBack Then

        If IsNothing(Request.UrlReferrer) Then
            sUrlReferrer = "NOWHERE"
        ElseIf (Request.UrlReferrer.ToString.Length = 0) Then
            sUrlReferrer = "NOWHERE"
        Else
            sUrlReferrer = Request.UrlReferrer.ToString
    End If

Answer 2

您正在寻找Reqyest.UrlReferrer ，它可能为null。

Answer 3

Safer method, because Request.UrlReferrer can be null.

Dim sUrlReferrer As String
If Not IsPostBack Then
    If (Request.UrlReferrer.ToString.Length = 0) Then
        sUrlReferrer = "NOWHERE"
    Else
        sUrlReferrer = Request.UrlReferrer.ToString
End If