<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Dim currurl As String = HttpContext.Current.Request.RawUrl
Dim querystring As String = Nothing
' Check to make sure some query string variables
' exist and if not add some and redirect.
Dim iqs As Int32 = currurl.IndexOf("?".ToCharArray())
If (iqs = -1) Then
Dim redirecturl As String = currurl & "?var1=1&var2=2+2%2f3&var1=3"
Response.Redirect(redirecturl, True)
' If query string variables exist, put them in
' a string.
ElseIf (iqs >= 0) Then
If (iqs < currurl.Length - 1) Then
querystring = currurl.Substring(iqs + 1)
End If
End If
' Parse the query string variables into a NameValueCollection.
Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(querystring)
' Iterate through the collection.
Dim sb As New StringBuilder()
For Each s As String In qscoll.AllKeys
sb.Append(s & " - " & qscoll(s) & "<br>")
Next s
' Write the results to the appropriate labels.
ParseOutput.Text = sb.ToString()
UrlRawOutput.Text = currurl
UrlEncodedOutput.Text = HttpUtility.UrlEncode(currurl)
UrlDecodedOutput.Text = HttpUtility.UrlDecode(currurl)
End Sub
</script>
<html>
<head id="Head1" runat="server">
<title>HttpUtility ParseQueryString Example</title>
</head>
<body>
<form id="Form1" runat="server">
The raw url is: <br />
<asp:Label id="UrlRawOutput"
runat="server" />
<br /><br />
The url encoded is: <br />
<asp:Label id="UrlEncodedOutput"
runat="server" />
<br /><br />
The url decoded is: <br />
<asp:Label id="UrlDecodedOutput"
runat="server" />
<br /><br />
The query string NameValueCollection is: <br />
<asp:Label id="ParseOutput"
runat="server" />
</form>
</body>
</html>