Question

I am working on a vb.net 2.0 application and trying to read HTTP headers. I am able to get header values through Request.Headers.Get(“HTTP_VARIABLE_NAME”). I would like to get all header name/value pairs using Headers property and display on a separate page under a button click event from a given page.

How can I loop and write all name/value pairs please?

Answer 1

Taken directly from MSDN, so all credit goes to the poor Microsoft employee who was given the rough task of documenting the system.net namespace. Although I do feel like I could write a better example myself…

The following code example displays the names and values of all headers in the HTTP request

Dim loop1, loop2 As Integer
 Dim arr1(), arr2() As String
 Dim coll As NameValueCollection


' Load Header collection into NameValueCollection object.
coll=Request.Headers

' Put the names of all keys into a string array.
arr1 = coll.AllKeys 
For loop1 = 0 To arr1.GetUpperBound(0)
   Response.Write("Key: " & arr1(loop1) & "<br>")
   arr2 = coll.GetValues(loop1) 
   ' Get all values under this key.
   For loop2 = 0 To arr2.GetUpperBound(0)
      Response.Write("Value " & CStr(loop2) & ": " & Server.HtmlEncode(arr2(loop2)) & "<br>")
    Next loop2
 Next loop1

I don’t know what you mean by “write to a page”, but this should get you started.

Is there a reason that forces you to use .NET 2? .NET 4 is still supported on Windows XP SP3 and up and offers many advantages over previous versions. Just putting it out there.