ASP.NET in a Nutshell

Name

Headers

Synopsis

NameValueCollection = Request.Headers

The Headers collection returns an instance of the NameValueCollection class containing all HTTP headers sent with the current request. This collection provides the same information that is returned by calling the Request.ServerVariables collection with the ALL_HTTP key.

Parameters

NameValueCollection

An Object variable of type NameValueCollection.

Example

The example writes the HTTP headers passed with the request to the browser, first by using the ServerVariables(“ALL_HTTP”) method and then by using the Headers collection:

Sub Page_Load(  )
   Dim AllHttp As String
   ' Get a String with all the HTTP headers
   AllHttp = Request.ServerVariables("ALL_HTTP")
   ' Use Replace to format the String
   AllHttp = Replace(AllHttp, "HTTP", "<br/>HTTP"
   Message.Text &= AllHttp & "<br/><br/>"
  
   Dim Counter1, Counter2 As Integer
   Dim Keys(), subKeys(  ) As String
   Dim HeaderColl As NameValueCollection
  
   ' Load Headers into NameValueCollection
   HeaderColl=Request.Headers
   ' Get keys into an array
   Keys = HeaderColl.AllKeys
   For Counter1 = 0 To Keys.GetUpperBound(0)
      Message.Text &= "Key: " & Keys(Counter1) & "<br/>"
      ' Get all values under this key
      subKeys = HeaderColl.GetValues(Counter1) 
      For Counter2 = 0 To subKeys.GetUpperBound(0)
         Message.Text &= "Value " & CStr(Counter2) & ": " & _
            subKeys(Counter2) & "<br/>"
      Next Counter2
   Next Counter1
End Sub

Notes

The Headers collection returns only the HTTP headers that were sent as a part of the current request, as opposed to ...