Sometimes, while troubleshooting I am interested to find out all the details about certain collections in ASP.NET, like Forms, QueryStrings, Headers, ServerVariables, Cookies, Sessions and Params... I created a very simple aspx page which would show you all the details...
Create any text file with .aspx extension in your IIS (I have named it Collection.aspx)
<%@ Page Language="vb"%>
<script runat="server">
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
Session("Test1") = "Testing 1"
Session("Test2") = "Testing 2"
Session("Test3") = "Testing 3"
Session("Test4") = "Testing 4"
Session("Test5") = "Testing 5"
If Not IsPostBack Then
Response.Cookies.Add(New HttpCookie("TC1", "Test Cookie 1"))
Response.Cookies.Add(New HttpCookie("TC2", "Test Cookie 2"))
Response.Cookies.Add(New HttpCookie("TC3", "Test Cookie 3"))
ddList.Items.Add(String.Empty)
ddList.Items.Add("forms")
ddList.Items.Add("querystring")
ddList.Items.Add("headers")
ddList.Items.Add("servervariables")
ddList.Items.Add("cookies")
ddList.Items.Add("session")
ddList.Items.Add("params")
ddList.AutoPostBack = True
Else
Response.Write("<BR><BR><HR>")
End If
End Sub
Private Sub ddList_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
Select Case ddList.SelectedItem.ToString
Case "forms"
EnumerateCollection(Request.Form)
Case "querystring"
EnumerateCollection(Request.QueryString)
Case "headers"
EnumerateCollection(Request.Headers)
Case "servervariables"
EnumerateCollection(Request.ServerVariables)
Case "param"
EnumerateCollection(Request.Params)
Case "cookies"
EnumerateCollection(Request.Cookies)
Case "session"
EnumerateCollection()
End Select
End Sub
Private Sub EnumerateCollection()
Dim x As String
Response.Write("<TABLE border=1>")
For Each x In Session.Keys
Response.Write("<TR>")
Response.Write("<TD>")
Response.Write(x)
Response.Write("</TD>")
Response.Write("<TD> ")
Response.Write(Session.Item(x))
Response.Write("</TD>")
Response.Write("</TR>")
Next
Response.Write("</TABLE>")
End Sub
Private Sub EnumerateCollection(ByVal coll As System.Web.HttpCookieCollection)
Dim x As String
Response.Write("<TABLE border=1>")
For Each x In coll.AllKeys
Response.Write("<TR>")
Response.Write("<TD>")
Response.Write(x)
Response.Write("</TD>")
Response.Write("<TD> ")
Response.Write(coll(x).Value)
Response.Write("</TD>")
Response.Write("</TR>")
Next
Response.Write("</TABLE>")
End Sub
Private Sub EnumerateCollection(ByVal coll As System.Collections.Specialized.NameValueCollection)
Dim x As String
Response.Write("<TABLE border=1>")
For Each x In coll
Response.Write("<TR>")
Response.Write("<TD>")
Response.Write(x)
Response.Write("</TD>")
Response.Write("<TD> ")
Response.Write(coll(x))
Response.Write("</TD>")
Response.Write("</TR>")
Next
Response.Write("</TABLE>")
End Sub
</script>
<HTML>
<HEAD>
<title>Show the different collections</title>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="ddList" runat="server" Width="176px" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 16px" OnSelectedIndexChanged=ddList_SelectedIndexChanged></asp:dropdownlist>
</form>
</body>
</HTML>
Is you browse this page, you will see a drop down as follows... select any option and it will list you all the different values of that collection.
Hope that helps,
Rahul