NetworkStream.Readable 屬性
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得或設定值，指出是否可以讀取 NetworkStream。
protected:
property bool Readable { bool get(); void set(bool value); };C#
protected bool Readable { get; set; }member this.Readable : bool with get, setProtected Property Readable As Boolean若要指示可以讀取 NetworkStream，則為 true，否則為 false。 預設值是 true。
在下列程式代碼範例中，屬性會 CanCommunicate 檢查 屬性， Readable 以判斷 是否 NetworkStream 可讀取 。
#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;
}
}
}
C#
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
您必須衍生自 類別， NetworkStream 才能使用 Readable 屬性。 如果 Readable 為 true， NetworkStream 則允許呼叫 Read 方法。 您也可以藉由檢查可公開存取CanRead的屬性來判斷 NetworkStream 是否可讀取 。
初始化 時NetworkStream會Readable設定 屬性。
| 產品 | 版本 |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
