FileWebRequest.GetRequestStream Metoda

Definicja

Przestrzeń nazw:

System.Net

Zestaw:

System.Net.Requests.dll

Źródło:

FileWebRequest.cs

Zwraca obiekt do zapisywania Stream danych w zasobie systemu plików.

public:
 override System::IO::Stream ^ GetRequestStream();

public override System.IO.Stream GetRequestStream ();

override this.GetRequestStream : unit -> System.IO.Stream

Public Overrides Function GetRequestStream () As Stream

Zwraca

Stream

Element do Stream zapisywania danych w zasobie systemu plików.

Wyjątki

WebException

Limit czasu żądania.

Przykłady

Poniższy przykład kodu używa GetRequestStream metody do uzyskania wystąpienia strumienia używanego do zapisu w pliku. Zapoznaj się z kompletnym FileWebRequest przykładem w klasie.

// Enter the string to write into the file.
Console::WriteLine( "Enter the string you want to write:" );
String^ userInput = Console::ReadLine();

// Convert the string to Byte array.
ASCIIEncoding^ encoder = gcnew ASCIIEncoding;
array<Byte>^byteArray = encoder->GetBytes( userInput );

// Set the ContentLength property.
myFileWebRequest->ContentLength = byteArray->Length;
String^ contentLength = myFileWebRequest->ContentLength.ToString();
Console::WriteLine( "\nThe content length is {0}.", contentLength );

// Get the file stream handler to write into the file.
Stream^ readStream = myFileWebRequest->GetRequestStream();

// Write to the file stream.
// Note. In order for this to work the file must be accessible
// on the network. This can be accomplished by setting the property
// sharing of the folder containg the file. The permissions
// can be set so everyone can modify the file.
// FileWebRequest::Credentials property cannot be used for this purpose.
readStream->Write( byteArray, 0, userInput->Length );
Console::WriteLine( "\nThe String you entered was successfully written into the file." );

// Enter the string to write to the file.
Console.WriteLine ("Enter the string you want to write:");

string userInput = Console.ReadLine ();

// Convert the string to a byte array.
ASCIIEncoding encoder = new ASCIIEncoding ();
byte[] byteArray = encoder.GetBytes (userInput);

// Set the ContentLength property.
myFileWebRequest.ContentLength = byteArray.Length;

string contentLength = myFileWebRequest.ContentLength.ToString ();

Console.WriteLine ("\nThe content length is {0}.", contentLength);

// Get the file stream handler to write to the file.
Stream readStream = myFileWebRequest.GetRequestStream ();

// Write to the file stream.
// Note.  For this to work, the file must be accessible
// on the network. This can be accomplished by setting the property
// sharing of the folder containg the file.
// FileWebRequest.Credentials property cannot be used for this purpose.
readStream.Write (byteArray, 0, userInput.Length);
Console.WriteLine ("\nThe String you entered was successfully written to the file.");

' Enter the string to write to the file.
Console.WriteLine("Enter the string you want to write:")
Dim userInput As String = Console.ReadLine()

' Convert the string to a byte array.
Dim encoder As New ASCIIEncoding
Dim byteArray As Byte() = encoder.GetBytes(userInput)

' Set the ContentLength property.
myFileWebRequest.ContentLength = byteArray.Length

Dim contentLength As String = myFileWebRequest.ContentLength.ToString()

Console.WriteLine(ControlChars.Lf + "The content length is {0}.", contentLength)


' Get the file stream handler to write to the file.
Dim readStream As Stream = myFileWebRequest.GetRequestStream()

' Write to the stream. 
' Note. For this to work the file must be accessible
' on the network. This can be accomplished by setting the property
' sharing of the folder containg the file.  
' FileWebRequest.Credentials property cannot be used for this purpose.
readStream.Write(byteArray, 0, userInput.Length)


Console.WriteLine(ControlChars.Lf + "The String you entered was successfully written to the file.")

Uwagi

Metoda GetRequestStream zapewnia synchroniczny dostęp do elementu Stream. W przypadku dostępu asynchronicznego użyj BeginGetRequestStream metod i EndGetRequestStream .

Zobacz też

• BeginGetRequestStream(AsyncCallback, Object)