HttpWebRequest.SendChunked Proprietà

Definizione

Spazio dei nomi:

System.Net

Assembly:

System.Net.Requests.dll

Origine:

HttpWebRequest.cs

Ottiene o imposta un valore che indica se inviare dati in segmenti alla risorsa Internet.

public:
 property bool SendChunked { bool get(); void set(bool value); };

public bool SendChunked { get; set; }

member this.SendChunked : bool with get, set

Public Property SendChunked As Boolean

Valore della proprietà

Boolean

true inviare dati alla risorsa Internet nei segmenti; in caso contrario, false. Il valore predefinito è false.

Eccezioni

InvalidOperationException

La richiesta è stata avviata chiamando il metodo GetRequestStream(), BeginGetRequestStream(AsyncCallback, Object), GetResponse()o BeginGetResponse(AsyncCallback, Object).

Esempio

Nell'esempio di codice seguente la proprietà SendChunked viene impostata su true in modo che i dati possano essere inviati in segmenti alla risorsa Internet.

// A new 'HttpWebRequest' object is created.
HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)( WebRequest::Create( myUri ) );
myHttpWebRequest->SendChunked = true;
// 'TransferEncoding' property is set to 'gzip'.
myHttpWebRequest->TransferEncoding = "gzip";
Console::WriteLine( "\nPlease Enter the data to be posted to the (http://<machine name>/CodeSnippetTest::asp) uri:" );
String^ inputData = Console::ReadLine();
String^ postData = String::Concat( "testdata= ", inputData );
// 'Method' property of 'HttpWebRequest' class is set to POST.
myHttpWebRequest->Method = "POST";
ASCIIEncoding^ encodedData = gcnew ASCIIEncoding;
array<Byte>^ byteArray = encodedData->GetBytes( postData );
// 'ContentType' property of the 'HttpWebRequest' class is set to S"application/x-www-form-urlencoded".
myHttpWebRequest->ContentType = "application/x-www-form-urlencoded";
// 'ContentLength' property is set to Length of the data to be posted.
myHttpWebRequest->ContentLength = byteArray->Length;
Stream^ newStream = myHttpWebRequest->GetRequestStream();
newStream->Write( byteArray, 0, byteArray->Length );
newStream->Close();
Console::WriteLine( "\nData has been posted to the Uri\n\nPlease wait for the response.........." );
// The response object of 'HttpWebRequest' is assigned to a 'HttpWebResponse' variable.
HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)( myHttpWebRequest->GetResponse() );
// Displaying the contents of the page to the console
Stream^ streamResponse = myHttpWebResponse->GetResponseStream();
StreamReader^ streamRead = gcnew StreamReader( streamResponse );
array<Char>^ readBuff = gcnew array<Char>(256);
int count = streamRead->Read( readBuff, 0, 256 );
Console::WriteLine( "\nThe contents of the HTML page are :  " );
while ( count > 0 )
{
   String^ outputData = gcnew String( readBuff,0,count );
   Console::WriteLine( outputData );
   count = streamRead->Read( readBuff, 0, 256 );
}
streamRead->Close();
streamResponse->Close();
myHttpWebResponse->Close();

// A new 'HttpWebRequest' object is created.
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(myUri);
myHttpWebRequest.SendChunked = true;
// 'TransferEncoding' property is set to 'gzip'.
myHttpWebRequest.TransferEncoding = "gzip";
Console.WriteLine("\nPlease Enter the data to be posted to the (http://<machine name>/CodeSnippetTest.asp) uri:");

string inputData = Console.ReadLine();
string postData = "testdata=" + inputData;
// 'Method' property of 'HttpWebRequest' class is set to POST.
myHttpWebRequest.Method = "POST";
ASCIIEncoding encodedData = new ASCIIEncoding();
byte[]  byteArray = encodedData.GetBytes(postData);
// 'ContentType' property of the 'HttpWebRequest' class is set to "application/x-www-form-urlencoded".
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
// 'ContentLength' property is set to Length of the data to be posted.
myHttpWebRequest.ContentLength = byteArray.Length;
Stream newStream = myHttpWebRequest.GetRequestStream();
newStream.Write(byteArray, 0, byteArray.Length);
newStream.Close();
Console.WriteLine("\nData has been posted to the Uri\n\nPlease wait for the response..........");

// The response object of 'HttpWebRequest' is assigned to a 'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
// Displaying the contents of the page to the console
Stream streamResponse = myHttpWebResponse.GetResponseStream();
StreamReader streamRead = new StreamReader(streamResponse);
Char[] readBuff = new Char[256];
int count = streamRead.Read(readBuff, 0, 256);
Console.WriteLine("\nThe contents of the HTML page are :  ");

while (count > 0)
{
   String outputData = new String(readBuff, 0, count);
   Console.WriteLine(outputData);
   count = streamRead.Read(readBuff, 0, 256);
}
// Release the response object resources.
streamRead.Close();
streamResponse.Close();
myHttpWebResponse.Close();

' A new 'HttpWebRequest' object is created.
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(myUri), HttpWebRequest)
myHttpWebRequest.SendChunked = True
' 'TransferEncoding' property is set to 'gzip'.
myHttpWebRequest.TransferEncoding = "gzip"
Console.WriteLine(ControlChars.Cr + "Please Enter the data to be posted to the (http://" + ChrW(60) + "machine name" + ChrW(62) + "/CodeSnippetTest.asp) uri:")
Dim inputData As String = Console.ReadLine()
Dim postData As String = "testdata" + ChrW(61) + inputData
' 'Method' property of 'HttpWebRequest' class is set to POST.
myHttpWebRequest.Method = "POST"
Dim encodedData As New ASCIIEncoding()
Dim byteArray As Byte() = encodedData.GetBytes(postData)
' 'ContentType' property of the 'HttpWebRequest' class is set to "application/x-www-form-urlencoded".
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded"
' 'ContentLength' property is set to Length of the data to be posted.
myHttpWebRequest.ContentLength = byteArray.Length
Dim newStream As Stream = myHttpWebRequest.GetRequestStream()
newStream.Write(byteArray, 0, byteArray.Length)
newStream.Close()
Console.WriteLine(ControlChars.Cr + "Data has been posted to the Uri" + ControlChars.Cr + ControlChars.Cr + "Please wait for the response..........")
' The response object of 'HttpWebRequest' is assigned to a 'HttpWebResponse' variable.
Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
' Displaying the contents of the page to the console
Dim streamResponse As Stream = myHttpWebResponse.GetResponseStream()
Dim streamRead As New StreamReader(streamResponse)
Dim readBuff(256) As [Char]
Dim count As Integer = streamRead.Read(readBuff, 0, 256)
Console.WriteLine(ControlChars.Cr + "The contents of the HTML page are :  ")
While count > 0
    Dim outputData As New [String](readBuff, 0, count)
    Console.WriteLine(outputData)
    count = streamRead.Read(readBuff, 0, 256)
End While
' Release the response object resources.  
streamRead.Close()
streamResponse.Close()
myHttpWebResponse.Close()

Commenti

Cautela

WebRequest, HttpWebRequest, ServicePointe WebClient sono obsoleti e non è consigliabile usarli per nuovi sviluppi. Usare invece HttpClient.

Quando SendChunked è true, la richiesta invia i dati alla risorsa Internet in segmenti. La risorsa Internet deve supportare la ricezione di dati in blocchi.

La modifica della proprietà SendChunked dopo l'avvio della richiesta chiamando il metodo GetRequestStream, BeginGetRequestStream, GetResponseo BeginGetResponse genera un InvalidOperationException.