HttpRequestMessageProperty.Headers 属性

定义

命名空间:

System.ServiceModel.Channels

程序集:

System.ServiceModel.Http.dll

程序集:

System.ServiceModel.dll

从 HTTP 请求获取 HTTP 标头。

public:
 property System::Net::WebHeaderCollection ^ Headers { System::Net::WebHeaderCollection ^ get(); };

public System.Net.WebHeaderCollection Headers { get; }

member this.Headers : System.Net.WebHeaderCollection

Public ReadOnly Property Headers As WebHeaderCollection

属性值

WebHeaderCollection

返回一个 WebHeaderCollection，其中包含 HTTP 请求中的 HTTP 标头。

示例

下面的代码演示如何使用此属性将自定义标头添加到消息中。

static Message BuildMessage()
{
    Message messageToSend = null;
    HttpRequestMessageProperty reqProps = new HttpRequestMessageProperty();
    reqProps.SuppressEntityBody = false;
    reqProps.Headers.Add("CustomHeader", "Test Value");
    reqProps.Headers.Add(HttpRequestHeader.UserAgent, "my user agent");

    try
    {
        messageToSend = Message.CreateMessage(MessageVersion.Soap11, "http://tempuri.org/IUntypedService/ProcessMessage", "Hello WCF");
    }
    catch (Exception e)
    {
        Console.WriteLine("got exception when sending message: " + e.ToString());
    }

    messageToSend.Properties[HttpRequestMessageProperty.Name] = reqProps;
    return messageToSend;
}

Private Shared Function BuildMessage() As Message
    Dim messageToSend As Message = Nothing
    Dim reqProps As New HttpRequestMessageProperty()
    reqProps.SuppressEntityBody = False
    reqProps.Headers.Add("CustomHeader", "Test Value")
    reqProps.Headers.Add(HttpRequestHeader.UserAgent, "my user agent")

    Try
        messageToSend = Message.CreateMessage(MessageVersion.Soap11, "http://tempuri.org/IUntypedService/ProcessMessage", "Hello WCF")
    Catch e As Exception
        Console.WriteLine("got exception when sending message: " & e.ToString())
    End Try

    messageToSend.Properties(HttpRequestMessageProperty.Name) = reqProps
    Return messageToSend
End Function

注解

有时此属性不可用，并且尝试访问此属性可能会引发异常。 当 WCF 托管在 IIS 中时（HTTP 请求完成后），尤其是在消息可用之前发送回复的单向方案中。