社区：
在这个简单的例子中我们将通过socket来实现文件的网络传输和接收功能。要实现这两个功能我们需要通过vs.net建立两个实例来完成。一个发送端，一个接收端。
发送端
Public Class Form1
Inherits System.Windows.Forms.Form
Private Sub Button1_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles Button1.Click
Dim sendsocket As New Net.Sockets.Socket
(Net.Sockets.AddressFamily.InterNetwork,
Net.Sockets.SocketType.Stream, Net.Sockets.ProtocolType.Tcp)
'实例化socket
Dim ipendpiont As New Net.IPEndPoint
(Net.IPAddress.Parse("192.168.0.1"), 8888)'建立终结点
'OpenFileDialog1.ShowDialog()
Dim fs As New IO.FileStream("c:\p.doc",
IO.FileMode.OpenOrCreate, IO.FileAccess.Read)'要传输的文件
Dim fssize(fs.Length - 1) As Byte
Dim strread As New IO.BinaryReader(fs)'流处理要传输的文件
'fs.Read(fssize, 0, fssize.Length - 1)
strread.Read(fssize, 0, fssize.Length - 1)
sendsocket.Connect(ipendpiont)'连接远程计算机
sendsocket.Send(fssize)'发送文件
Label1.Text = fs.Length()
fs.Close()
sendsocket.Shutdown(Net.Sockets.SocketShutdown.Send)
'关闭发送连接
sendsocket.Close()'关闭本机socket
End Sub
End Class
接收端
Public Class Form1
Inherits System.Windows.Forms.Form
Dim receivesocket As New Net.Sockets.Socket
(Net.Sockets.AddressFamily.InterNetwork,
Net.Sockets.SocketType.Stream,
Net.Sockets.ProtocolType.Tcp)
Private Sub Form1_Load(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Load
Dim hostipendpiont As New Net.IPEndPoint
(Net.IPAddress.Parse("192.168.0.1"), 8888)
receivesocket.Bind(hostipendpiont)
'建立远程计算机的的socket
receivesocket.Listen(2)'监听socket
End Sub
Private Sub Button1_Click(ByVal sender As Object,
ByVal e As System.EventArgs) Handles Button1.Click
Dim recfs As New IO.FileStream("p.doc",
IO.FileMode.OpenOrCreate)
'接收数据并将其保存到一个新的文件中
Dim recbyte(229888) As Byte
Dim hostsocket As Net.Sockets.Socket =
receivesocket.Accept()
'同意和发送端计算机建立连接
Dim newfilestr As New IO.BinaryWriter(recfs)'流写
hostsocket.Receive(recbyte)
'recfs.Write(recbyte, 0, recbyte.Length - 1)
newfilestr.Write(recbyte, 0, recbyte.Length - 1)
recfs.Close()
hostsocket.Shutdown(Net.Sockets.SocketShutdown.Receive)
hostsocket.Close()
End Sub
End Class
通过上面的简单语句我们就完成网络文件的发送和接收，但是这里有一点要注意，此代码只可以接受文本文件和图片文件，对于其他文件的发送和接收将导致编码错误，如果你不相信你可以传输一个mp3文件，再在播放器中打开接收到的mp3文件，你会听到只有开头不到2秒的音乐可以播放。如果想解决这个问题你需要使用，net中的tcp/ip类或udp类来实现，当然调用底层的socket动态库也可以解决这个问题。
