WebRequest.RequestUri 属性

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

WebRequest.cs

当在子类中被重写时，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

一个 Uri ，表示与请求关联的资源。

例外

NotImplementedException

当未在子类中重写该属性时，试图获取或设置该属性。

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

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

注意

类 WebRequest 是类 abstract 。 实例在运行时的实际行为 WebRequest 由 方法返回 WebRequest.Create 的后代类确定。 有关默认值和异常的详细信息，请参阅后代类（如 HttpWebRequest 和 FileWebRequest）的文档。

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 以便为请求提供服务，则后代必须提供属性，以包含实际为请求提供服务的 URI

另请参阅

• RequestUri
• Address