NetworkStream.Writeable Propriedade
Definição
Obtém um valor que indica se o NetworkStream é gravável.Gets a value that indicates whether the NetworkStream is writable.
protected:
property bool Writeable { bool get(); void set(bool value); };
protected bool Writeable { get; set; }
member this.Writeable : bool with get, set
Protected Property Writeable As Boolean
Valor da propriedade
true se os dados puderem ser gravados no fluxo; caso contrário, false.true if data can be written to the stream; otherwise, false. O valor padrão é true.The default value is true.
Exemplos
No exemplo de código a seguir, a CanCommunicate propriedade verifica a Writeable propriedade para determinar se o NetworkStream é gravável.In the following code example, the CanCommunicate property checks the Writeable property to determine if the NetworkStream is writable.
#using <System.dll>
using namespace System;
using namespace System::Net;
using namespace System::Net::Sockets;
ref class MyNetworkStream_Sub_Class: public NetworkStream
{
public:
MyNetworkStream_Sub_Class( System::Net::Sockets::Socket^ socket, bool ownsSocket )
: NetworkStream( socket, ownsSocket )
{
}
property bool IsConnected
{
// You can use the Socket method to examine the underlying Socket.
bool get()
{
return this->Socket->Connected;
}
}
property bool CanCommunicate
{
bool get()
{
if ( !this->Readable | !this->Writeable )
{
return false;
}
else
{
return true;
}
}
}
using System;
using System.Net;
using System.Net.Sockets;
public class MyNetworkStream_Sub_Class : NetworkStream
{
public MyNetworkStream_Sub_Class(Socket socket, bool ownsSocket) :
base(socket, ownsSocket)
{
}
// You can use the Socket method to examine the underlying Socket.
public bool IsConnected
{
get
{
return this.Socket.Connected;
}
}
public bool CanCommunicate
{
get
{
if (!this.Readable | !this.Writeable)
{
return false;
}
else
{
return true;
}
}
}
Public Class MyNetworkStream_Sub_Class
Inherits NetworkStream
Public Sub New(socket As Socket, ownsSocket As Boolean)
MyBase.New(socket, ownsSocket)
End Sub
' Suppose you wanted a property for determining if Socket is connected. You can use
' the protected method 'Socket' to return underlying Socket.
Public ReadOnly Property IsConnected() As Boolean
Get
Return Me.Socket.Connected
End Get
End Property
' You could also use public NetworkStream methods 'CanRead' and 'CanWrite'.
Public ReadOnly Property CanCommunicate() As Boolean
Get
If Not Me.Readable Or Not Me.Writeable Then
Return False
Else
Return True
End If
End Get
End Property
Public Shared Sub DoSomethingSignificant()
End Sub
' Do something significant in here
Comentários
Você deve derivar da NetworkStream classe para usar a Writeable propriedade.You must derive from the NetworkStream class to use the Writeable property. Se Writeable é true , NetworkStream permite chamadas para o Write método.If Writeable is true, NetworkStream allows calls to the Write method. Você também pode determinar se um NetworkStream é gravável verificando a propriedade publicamente acessível CanWrite .You can also determine whether a NetworkStream is writable by checking the publicly accessible CanWrite property.
A Writeable propriedade é definida quando o NetworkStream é inicializado.The Writeable property is set when the NetworkStream is initialized.