This documentation is archived and is not being maintained.

HttpRequest.Headers Property

Gets a collection of HTTP headers.

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

'Declaration
Public ReadOnly Property Headers As NameValueCollection
'Usage
Dim instance As HttpRequest
Dim value As NameValueCollection

value = instance.Headers

/** @property */
public NameValueCollection get_Headers ()

public function get Headers () : NameValueCollection

Not applicable.

Property Value

A NameValueCollection of headers.

For a listing of all possible headers, see Request Header Fields on the W3C Web site.

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
   

int loop1, loop2;
NameValueCollection coll;

// Load Header collection into NameValueCollection object.
coll = get_Request().get_Headers();

// Put the names of all keys into a string array.
String arr1[] = coll.get_AllKeys();
for (loop1 = 0; loop1 < arr1.length; loop1++) {
    get_Response().Write(("Key: " + arr1[loop1] + "<br>"));
    // Get all values under this key.
    String arr2[] = coll.GetValues(arr1[loop1]);
    for (loop2 = 0; loop2 < arr2.length; loop2++) {
        get_Response().Write(("Value " + loop2 + ": "
            + get_Server().HtmlEncode(arr2[loop2]) + "<br>"));
    }
}

var arr1, arr2 : String[]
var coll : NameValueCollection

coll=Request.Headers  // Load Header collection into NameValueCollection object.
arr1 = coll.AllKeys   // Put names of all keys into a string array.
for(var i=0; i < arr1.Length; i++){
  Response.Write("Key: " + arr1[i] + "<br>")
  arr2 = coll.GetValues(i) // Get all values under this key.
  for(var j=0; j < arr2.Length; j++){
      Response.Write("Value " + j + ": " + Server.HtmlEncode(arr2[j]) + "<br>")
  }
}


Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0
Show: