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HttpListenerRequest.ContentType Property

Gets the MIME type of the body data included in the request.

Namespace:  System.Net
Assembly:  System (in System.dll)

Public ReadOnly Property ContentType As String

Property Value

Type: System.String
A String that contains the text of the request's Content-Type header.

If a client includes body data in a request, it declares the Multipurpose Internet Mail Extensions (MIME) type of the body data in the Content-Type header. For example, the default MIME type of data returned from a Web form using the POST method is application/x-www-form-urlencoded.

For a complete list of request headers, see the HttpRequestHeader enumeration and RFC 2616, available at

The ContentType is null when there is no Content-Type header in the request.

The following code example demonstrates how to use this property.

Public Shared Sub ShowRequestData(ByVal request As HttpListenerRequest)
    If Not request.HasEntityBody Then
        Console.WriteLine("No client data was sent with the request.")
    End If
    Dim body As System.IO.Stream = request.InputStream
    Dim encoding As System.Text.Encoding = request.ContentEncoding
    Dim reader As New System.IO.StreamReader(body, encoding)
    If request.ContentType IsNot Nothing Then
        Console.WriteLine("Client data content type {0}", request.ContentType)
    End If
    Console.WriteLine("Client data content length {0}", request.ContentLength64)

    Console.WriteLine("Start of client data:")
    ' Convert the data to a string and display it on the console.
    Dim s As String = reader.ReadToEnd()
    Console.WriteLine("End of client data:")
    ' If you are finished with the request, it should be closed also.
End Sub

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.