WebRequest.RequestUri 属性
定义
重要
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当在子类中被重写时,获取与请求关联的 Internet 资源的 URI。
public:
abstract property Uri ^ RequestUri { Uri ^ get(); };
public:
virtual property Uri ^ RequestUri { Uri ^ get(); };
public abstract Uri RequestUri { get; }
public virtual Uri RequestUri { get; }
member this.RequestUri : Uri
Public MustOverride ReadOnly Property RequestUri As Uri
Public Overridable ReadOnly Property RequestUri As Uri
属性值
一个 Uri ,表示与请求关联的资源。
例外
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
适用于
另请参阅
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