WebRequest.RequestUri 属性

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

WebRequest.cs

在后代类中重写时，获取与请求关联的 Internet 资源的 URI。

public:
 virtual property Uri ^ RequestUri { Uri ^ get(); };

public virtual Uri RequestUri { get; }

member this.RequestUri : Uri

Public Overridable ReadOnly Property RequestUri As Uri

属性值

Uri

表示与请求关联的资源的 Uri。

例外

NotImplementedException

如果未在子代类中重写属性，则会尝试获取或设置该属性。

示例

以下示例检查 RequestUri 属性以确定最初请求的网站。

// Create a new WebRequest object to the mentioned URL.
WebRequest^ myWebRequest = WebRequest::Create( "http://www.contoso.com" );
Console::WriteLine( "\nThe Uri requested is {0}", myWebRequest->RequestUri);
// Assign the response object of 'WebRequest' to a 'WebResponse' variable.
WebResponse^ myWebResponse = myWebRequest->GetResponse();
      // Get the stream containing content returned by the server.
Stream^ streamResponse = myWebResponse->GetResponseStream();
      Console::WriteLine("\nThe Uri that responded to the request is '{0}'",myWebResponse->ResponseUri);
StreamReader^ reader = gcnew StreamReader(streamResponse);
      // Read the content.
String^ responseFromServer = reader->ReadToEnd();
// Display the content.
Console::WriteLine("\nThe HTML Contents received:");
Console::WriteLine (responseFromServer);
// Cleanup the streams and the response.
reader->Close();
streamResponse->Close();
myWebResponse->Close();

      // Create a new WebRequest Object to the mentioned URL.
      WebRequest myWebRequest=WebRequest.Create("http://www.contoso.com");
      Console.WriteLine("\nThe Uri that was requested is {0}",myWebRequest.RequestUri);
      // Assign the response object of 'WebRequest' to a 'WebResponse' variable.
      WebResponse myWebResponse=myWebRequest.GetResponse();
      // Get the stream containing content returned by the server.
      Stream streamResponse=myWebResponse.GetResponseStream();
      Console.WriteLine("\nThe Uri that responded to the WebRequest is '{0}'",myWebResponse.ResponseUri);
StreamReader reader = new StreamReader (streamResponse);
      // Read the content.
string responseFromServer = reader.ReadToEnd ();
// Display the content.
Console.WriteLine("\nThe HTML Contents received:");
Console.WriteLine (responseFromServer);
// Cleanup the streams and the response.
reader.Close ();
streamResponse.Close ();
myWebResponse.Close ();

' Create a new WebRequest Object to the mentioned URL.
Dim myWebRequest As WebRequest = WebRequest.Create("http://www.contoso.com")
Console.WriteLine(ControlChars.Cr + ControlChars.Lf +"The Uri that was requested is {0}", myWebRequest.RequestUri)
' Assign the response object of 'WebRequest' to a 'WebResponse' variable.
Dim myWebResponse As WebResponse = myWebRequest.GetResponse()
      ' Get the stream containing content returned by the server.
Dim streamResponse As Stream = myWebResponse.GetResponseStream()
Console.WriteLine(ControlChars.Cr + ControlChars.Lf + "The Uri that responded to the request is {0}", myWebResponse.ResponseUri)
' Print the HTML contents of the page to the console. 
Dim reader As New StreamReader(streamResponse)
      ' Read the content.
      Dim responseFRomServer As String = reader.ReadToEnd()
' Display the content.
Console.WriteLine(ControlChars.Cr + ControlChars.Lf +"The HTML Contents received:")
Console.WriteLine (responseFromServer)
' Cleanup the streams and the response.
reader.Close ()
streamResponse.Close ()
myWebResponse.Close ()

注解

谨慎

WebRequest、HttpWebRequest、ServicePoint和 WebClient 已过时，不应将其用于新开发。 请改用 HttpClient。

在子代类中重写时，RequestUri 属性包含 Create 方法用于创建请求的 Uri 实例。

注意

WebRequest 类是 abstract 类。 运行时 WebRequest 实例的实际行为由 WebRequest.Create 方法返回的后代类确定。 有关默认值和异常的详细信息，请参阅子代类的文档，例如 HttpWebRequest 和 FileWebRequest。

实施者说明

RequestUri 必须包含传递给 Create(Uri) 方法的原始 Uri 实例。 如果协议能够将请求重定向到其他 URI 来为请求提供服务，则后代必须提供一个属性来包含实际为请求提供服务的 URI

另请参阅

• RequestUri
• Address