NegotiateStream.Write(Byte[], Int32, Int32) 方法

定義

命名空間:

System.Net.Security

組件:

System.Net.Security.dll

來源:

NegotiateStream.cs

使用指定的緩衝區和位移，將指定數目的 Byte 寫入至基礎資料流。

public:
 override void Write(cli::array <System::Byte> ^ buffer, int offset, int count);

public override void Write (byte[] buffer, int offset, int count);

override this.Write : byte[] * int * int -> unit

Public Overrides Sub Write (buffer As Byte(), offset As Integer, count As Integer)

參數

buffer

Byte[]

Byte 陣列，提供寫入至資料流的位元組。

offset

Int32

Int32，包含 buffer 中以零起始的位置，用來開始讀取將要寫入資料流的位元組。

count

Int32

Int32，包含要從 buffer 讀取的位元組數。

例外狀況

ArgumentNullException

buffer 為 null。

ArgumentException

offset is less than 0.

-或-

offset 大於 buffer 的長度。

-或-

offset 加上計數大於 buffer 的長度。

IOException

寫入作業失敗。

-或-

使用了加密，但無法解密資料。

NotSupportedException

已經有寫入作業正在進行中。

ObjectDisposedException

此物件已關閉。

InvalidOperationException

尚未執行驗證。

範例

下列程式代碼範例示範如何寫入 NegotiateStream。

int main()
{
   
   // Establish the remote endpoint for the socket.
   // For this example, use the local machine.
   IPHostEntry^ ipHostInfo = Dns::GetHostEntry( Dns::GetHostName() );
   IPAddress^ ipAddress = ipHostInfo->AddressList[ 0 ];
   
   // Client and server use port 11000. 
   IPEndPoint^ remoteEP = gcnew IPEndPoint( ipAddress,11000 );
   
   // Create a TCP/IP socket.
   TcpClient^ client = gcnew TcpClient;
   
   // Connect the socket to the remote endpoint.
   client->Connect( remoteEP );
   Console::WriteLine( L"Client connected to {0}.", remoteEP );
   
   // Ensure the client does not close when there is 
   // still data to be sent to the server.
   client->LingerState = (gcnew LingerOption( true,0 ));
   
   // Request authentication.
   NetworkStream^ clientStream = client->GetStream();
   NegotiateStream^ authStream = gcnew NegotiateStream( clientStream );
   
   // Request authentication for the client only (no mutual authentication).
   // Authenicate using the client's default credetials.
   // Permit the server to impersonate the client to access resources on the server only.
   // Request that data be transmitted using encryption and data signing.
   authStream->AuthenticateAsClient( dynamic_cast<NetworkCredential^>(CredentialCache::DefaultCredentials), 
          L"", 
          ProtectionLevel::EncryptAndSign, 
          TokenImpersonationLevel::Impersonation );
   
   DisplayAuthenticationProperties( authStream );
   DisplayStreamProperties( authStream );
   if ( authStream->CanWrite )
   {
      
      // Encode the test data into a byte array.
      array<Byte>^message = System::Text::Encoding::UTF8->GetBytes( L"Hello from the client." );
      authStream->Write( message, 0, message->Length );
      authStream->Flush();
      Console::WriteLine( L"Sent {0} bytes.", message->Length );
   }

   
   // Close the client connection.
   authStream->Close();
   Console::WriteLine( L"Client closed." );
}

    public static void Main(String[] args)
    {
        // Establish the remote endpoint for the socket.
        // For this example, use the local machine.
        IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[0];
        // Client and server use port 11000.
        IPEndPoint remoteEP = new IPEndPoint(ipAddress,11000);
        // Create a TCP/IP socket.
       TcpClient client = new TcpClient();
        // Connect the socket to the remote endpoint.
        client.Connect(remoteEP);
        Console.WriteLine("Client connected to {0}.",
            remoteEP.ToString());
        // Ensure the client does not close when there is
        // still data to be sent to the server.
        client.LingerState = (new LingerOption(true,0));
        // Request authentication.
        NetworkStream clientStream = client.GetStream();
        NegotiateStream authStream = new NegotiateStream(clientStream);
        // Request authentication for the client only (no mutual authentication).
        // Authenicate using the client's default credetials.
        // Permit the server to impersonate the client to access resources on the server only.
        // Request that data be transmitted using encryption and data signing.
        authStream.AuthenticateAsClient(
             (NetworkCredential) CredentialCache.DefaultCredentials,
             "",
             ProtectionLevel.EncryptAndSign,
             TokenImpersonationLevel.Impersonation);
        DisplayAuthenticationProperties(authStream);
        DisplayStreamProperties(authStream);
        if (authStream.CanWrite)
        {
             // Encode the test data into a byte array.
            byte[] message = System.Text.Encoding.UTF8.GetBytes("Hello from the client.");
            authStream.Write(message, 0, message.Length);
            authStream.Flush();
            Console.WriteLine("Sent {0} bytes.", message.Length);
        }
        // Close the client connection.
        authStream.Close();
        Console.WriteLine("Client closed.");
}

備註

如果啟用加密、簽署或加密和簽署，此方法會從緩衝區、加密、簽署或加密和簽署數據，並使用基礎數據流傳輸數據。 如果未使用任何安全性服務，例如數據加密或簽署，這個方法會在基礎數據流上叫用 Write 。

這個方法會在寫入作業完成時封鎖。 若要在作業完成時防止封鎖，請使用 WriteAsync 方法。

在成功驗證之前，您無法呼叫這個方法。 若要驗證，請呼叫其中 AuthenticateAsClient一個 、 AuthenticateAsClientAsync、 BeginAuthenticateAsClient、 AuthenticateAsServer、 AuthenticateAsServerAsync、 或 BeginAuthenticateAsServer 方法。

類別 NegotiateStream 不支援多個同時寫入作業。 如果您嘗試在相同的數據流上執行另一個寫入作業時啟動寫入作業， NotSupportedException 則會擲回例外狀況。