WebResponse.GetResponseStream 方法

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

WebResponse.cs

当在子类中重写时，从 Internet 资源返回数据流。

public:
 virtual System::IO::Stream ^ GetResponseStream();

public virtual System.IO.Stream GetResponseStream ();

abstract member GetResponseStream : unit -> System.IO.Stream
override this.GetResponseStream : unit -> System.IO.Stream

Public Overridable Function GetResponseStream () As Stream

返回

Stream

用于从 Internet 资源中读取数据的 Stream 类的实例。

例外

NotSupportedException

当未在子类中重写该方法时，试图访问该方法。

示例

以下示例使用 GetResponseStream 返回实例 StreamReader 。 小型本地缓冲区用于从 StreamReader 读取数据并将其输出到控制台。

// Create a 'WebRequest' object with the specified url.
WebRequest^ myWebRequest = WebRequest::Create( "http://www.contoso.com" );

// Send the 'WebRequest' and wait for response.
WebResponse^ myWebResponse = myWebRequest->GetResponse();

// Obtain a 'Stream' object associated with the response object.
Stream^ ReceiveStream = myWebResponse->GetResponseStream();

Encoding^ encode = System::Text::Encoding::GetEncoding( "utf-8" );

// Pipe the stream to a higher level stream reader with the required encoding format.
StreamReader^ readStream = gcnew StreamReader( ReceiveStream,encode );
Console::WriteLine( "\nResponse stream received" );
array<Char>^ read = gcnew array<Char>(256);

// Read 256 charcters at a time.
int count = readStream->Read( read, 0, 256 );
Console::WriteLine( "HTML...\r\n" );

while ( count > 0 )
{
   // Dump the 256 characters on a string and display the string onto the console.
   String^ str = gcnew String( read,0,count );
   Console::Write( str );
   count = readStream->Read( read, 0, 256 );
}

Console::WriteLine( "" );
// Release the resources of stream object.
readStream->Close();

// Release the resources of response object.
myWebResponse->Close();

// Create a 'WebRequest' object with the specified url. 
WebRequest myWebRequest = WebRequest.Create("http://www.contoso.com");

// Send the 'WebRequest' and wait for response.
using WebResponse myWebResponse = myWebRequest.GetResponse();

// Obtain a 'Stream' object associated with the response object.
Stream ReceiveStream = myWebResponse.GetResponseStream();

Encoding encode = System.Text.Encoding.GetEncoding("utf-8");

// Pipe the stream to a higher level stream reader with the required encoding format. 
StreamReader readStream = new StreamReader(ReceiveStream, encode);
Console.WriteLine("\nResponse stream received");
Char[] read = new Char[256];

// Read 256 charcters at a time.    
int count = readStream.Read(read, 0, 256);
Console.WriteLine("HTML...\r\n");

while (count > 0)
{
    // Dump the 256 characters on a string and display the string onto the console.
    String str = new String(read, 0, count);
    Console.Write(str);
    count = readStream.Read(read, 0, 256);
}
Console.WriteLine();

' Create a 'WebRequest' object with the specified url 
Dim myWebRequest As WebRequest = WebRequest.Create("www.contoso.com")

' Send the 'WebRequest' and wait for response.
Using myWebResponse As WebResponse = myWebRequest.GetResponse()

    ' Call method 'GetResponseStream' to obtain stream associated with the response object
    Dim ReceiveStream As Stream = myWebResponse.GetResponseStream()
    
    Dim encode As Encoding = System.Text.Encoding.GetEncoding("utf-8")

    ' Pipe the stream to a higher level stream reader with the required encoding format.
    Dim readStream As New StreamReader(ReceiveStream, encode)
    Console.WriteLine(ControlChars.Cr + "Response stream received")
    Dim read(256) As [Char]

    ' Read 256 charcters at a time    .
    Dim count As Integer = readStream.Read(read, 0, 256)
    Console.WriteLine("HTML..." + ControlChars.Lf + ControlChars.Cr)
    While count > 0

        ' Dump the 256 characters on a string and display the string onto the console.
        Dim str As New [String](read, 0, count)
        Console.Write(str)
        count = readStream.Read(read, 0, 256)

    End While
    Console.WriteLine("")
End Using

注解

方法 GetResponseStream 从 Internet 资源返回数据流。

注意

必须关闭响应流，以避免系统资源耗尽。 可以通过调用 Stream.Close 或 关闭响应流 Close

另请参阅

• 在网络上使用流