HttpListenerRequest.ContentType 属性

定义

命名空间:

System.Net

程序集:

System.Net.HttpListener.dll

Source:

HttpListenerRequest.cs

获取包含在请求中的正文数据的 MIME 类型。

public:
 property System::String ^ ContentType { System::String ^ get(); };

public string? ContentType { get; }

member this.ContentType : string

Public ReadOnly Property ContentType As String

属性值

String

String，包含请求的 Content-Type 标头的文本。

示例

下面的代码示例演示如何使用此属性。

public static void ShowRequestData (HttpListenerRequest request)
{
    if (!request.HasEntityBody)
    {
        Console.WriteLine("No client data was sent with the request.");
        return;
    }
    System.IO.Stream body = request.InputStream;
    System.Text.Encoding encoding = request.ContentEncoding;
    System.IO.StreamReader reader = new System.IO.StreamReader(body, encoding);
    if (request.ContentType != null)
    {
        Console.WriteLine("Client data content type {0}", request.ContentType);
    }
    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.
    string s = reader.ReadToEnd();
    Console.WriteLine(s);
    Console.WriteLine("End of client data:");
    body.Close();
    reader.Close();
    // If you are finished with the request, it should be closed also.
}

Public Shared Sub ShowRequestData(ByVal request As HttpListenerRequest)
    If Not request.HasEntityBody Then
        Console.WriteLine("No client data was sent with the request.")
        Return
    End If

    Dim body As System.IO.Stream = request.InputStream
    Dim encoding As System.Text.Encoding = request.ContentEncoding
    Dim reader As System.IO.StreamReader = 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(s)
    Console.WriteLine("End of client data:")
    body.Close()
    reader.Close()
    ' If you are finished with the request, it should be closed also.
End Sub

注解

如果客户端在请求中包含正文数据，则会在标头中 Content-Type 声明多用途 Internet 邮件扩展 (MIME) 类型。 例如，使用 POST 方法从 Web 窗体返回的数据的默认 MIME 类型为 application/x-www-form-urlencoded。

有关请求标头的完整列表，请参阅 HttpRequestHeader 枚举和 RFC 2616，请参阅 https://www.rfc-editor.org。

ContentType如果请求中没有Content-Type标头，则 为 null。

另请参阅

• HttpListener
• HttpListenerContext
• HttpListenerResponse