WebResponse.GetResponseStream 方法

定義

在子系類別中覆寫時,傳回來自網際網路資源的資料流。When overridden in a descendant class, returns the data stream from the Internet resource.

public:
 abstract System::IO::Stream ^ GetResponseStream();
public:
 virtual System::IO::Stream ^ GetResponseStream();
public abstract System.IO.Stream GetResponseStream ();
public virtual System.IO.Stream GetResponseStream ();
abstract member GetResponseStream : unit -> System.IO.Stream
abstract member GetResponseStream : unit -> System.IO.Stream
override this.GetResponseStream : unit -> System.IO.Stream
Public MustOverride Function GetResponseStream () As Stream
Public Overridable Function GetResponseStream () As Stream

傳回

Stream

Stream 類別的執行個體,從網際網路資源讀取資料。An instance of the Stream class for reading data from the Internet resource.

例外狀況

當方法在子代類別中未覆寫時,會嘗試存取該方法。Any attempt is made to access the method, when the method is not overridden in a descendant class.

範例

下列範例會使用 GetResponseStream 來傳回 StreamReader 實例。The following example uses GetResponseStream to return a StreamReader instance. 使用小型本機緩衝區從讀取資料 StreamReader ,並將其輸出到主控台。A small local buffer is used to read data from the StreamReader and output it to the console.

// 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.
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("");
 // Release the resources of stream object.
 readStream.Close();

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


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

' Send the 'WebRequest' and wait for response.
Dim 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("")

' Release the resources of stream object.
 readStream.Close()

 ' Release the resources of response object.
myWebResponse.Close()

備註

方法會傳回 GetResponseStream 來自網際網路資源的資料流程。The GetResponseStream method returns the data stream from the Internet resource.

注意

必須關閉回應資料流程,以避免系統資源不足。The response stream must be closed to avoid running out of system resources. 您可以藉由呼叫或,關閉回應資料流程。 Stream.CloseCloseThe response stream can be closed by calling Stream.Close or Close

適用於