HttpListenerRequest.Headers Property


Gets the collection of header name/value pairs sent in the request.

 property System::Collections::Specialized::NameValueCollection ^ Headers { System::Collections::Specialized::NameValueCollection ^ get(); };
public System.Collections.Specialized.NameValueCollection Headers { get; }
member this.Headers : System.Collections.Specialized.NameValueCollection
Public ReadOnly Property Headers As NameValueCollection

Property Value


A WebHeaderCollection that contains the HTTP headers included in the request.


The following code example displays all the information in a given WebHeaderCollection object.

    // Displays the header information that accompanied a request.
public static void DisplayWebHeaderCollection(HttpListenerRequest request)
    System.Collections.Specialized.NameValueCollection headers = request.Headers;
    // Get each header and display each value.
    foreach (string key in headers.AllKeys)
        string[] values = headers.GetValues(key);
        if(values.Length > 0)
            Console.WriteLine("The values of the {0} header are: ", key);
            foreach (string value in values)
                Console.WriteLine("   {0}", value);
            Console.WriteLine("There is no value associated with the header.");
Public Shared Sub DisplayWebHeaderCollection(ByVal request As HttpListenerRequest)
    Dim headers As System.Collections.Specialized.NameValueCollection = request.Headers

    ' Get each header and display each value.
    For Each key As String In headers.AllKeys
        Dim values As String() = headers.GetValues(key)

        If values.Length > 0 Then
            Console.WriteLine("The values of the {0} header are: ", key)

            For Each value As String In values
                Console.WriteLine("   {0}", value)
            Console.WriteLine("There is no value associated with the header.")
        End If
End Sub


Request headers contain metadata information. For example, headers can contain the Uniform Resource Identifier (URI) of the resource that referred the client to the server, the identity of the user agent employed by the client, and the acceptable MIME types for data in the response body.

For a complete list of request headers, see the HttpRequestHeader enumeration.

Applies to

See also