NetworkStream.Writeable 属性
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
获取一个值,该值指示 NetworkStream 是否可写入数据。
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
属性值
如果数据可写入该流,则为 true
;否则,为 false
。 默认值是 true
。
示例
在下面的代码示例中,该 CanCommunicate
属性检查 Writeable 属性以确定该属性是否 NetworkStream 可写。
#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
注解
必须派生自 NetworkStream 类才能使用该 Writeable 属性。 如果是Writeable,NetworkStream则允许调用Write该方法。true
还可以通过检查可公开访问CanWrite的属性来确定某个NetworkStream项是否可写。
初始化 Writeable 时 NetworkStream 设置该属性。