用.net中的socket實現(xiàn)文件傳輸
2024-07-10 12:59:36
供稿：網(wǎng)友
本文來源于網(wǎng)頁設(shè)計愛好者web開發(fā)社區(qū)http://www.html.org.cn收集整理，歡迎訪問。socket是網(wǎng)絡(luò)套接字，使用它我們可以很方便的實現(xiàn)網(wǎng)絡(luò)的數(shù)據(jù)傳輸。在.net中提供了socket類來幫助開
發(fā)者調(diào)用socket的使用，從而避免了調(diào)用socket的動態(tài)庫來實現(xiàn)socket的麻煩。下面我們就來看一個簡單的例子，從這個簡單的例子來看看.net中的socket類實現(xiàn)socket是多么的方便。
編程思路：在這個簡單的例子中我們將通過socket來實現(xiàn)文件的網(wǎng)絡(luò)傳輸和接收功能。要實現(xiàn)這兩個功能我們需要通過vs.net建立兩個實例來完成。一個發(fā)送端，一個接收端。由于文中已經(jīng)給出了詳細的注釋這里就不羅嗦了。
發(fā)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)
'實例化socket
dim ipendpiont as new net.ipendpoint
(net.ipaddress.parse("192.168.0.1"), 8888)'建立終結(jié)點
'openfiledialog1.showdialog()
dim fs as new io.filestream("c:/p.doc",
io.filemode.openorcreate, io.fileaccess.read)'要傳輸?shù)奈募?br> dim fssize(fs.length - 1) as byte
dim strread as new io.binaryreader(fs)'流處理要傳輸?shù)奈募?br> 'fs.read(fssize, 0, fssize.length - 1)
strread.read(fssize, 0, fssize.length - 1)
sendsocket.connect(ipendpiont)'連接遠程計算機
sendsocket.send(fssize)'發(fā)送文件
label1.text = fs.length()
fs.close()
sendsocket.shutdown(net.sockets.socketshutdown.send)
'關(guān)閉發(fā)送連接
sendsocket.close()'關(guān)閉本機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)
'建立遠程計算機的的socket
receivesocket.listen(2)'監(jiān)聽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)
'接收數(shù)據(jù)并將其保存到一個新的文件中
dim recbyte(229888) as byte
dim hostsocket as net.sockets.socket =
receivesocket.accept()
'同意和發(fā)送端計算機建立連接
dim newfilestr as new io.binarywriter(recfs)'流寫
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
通過上面的簡單語句我們就完成網(wǎng)絡(luò)文件的發(fā)送和接收，但是這里有一點要注意，此代碼只可以接受文本文件和圖片文件，對于其他文件的發(fā)送和接收將導(dǎo)致編碼錯誤，如果你不相信你可以傳輸一個mp3文件，再在播放器中打開接收到的mp3文件，你會聽到只有開頭不到2秒的音樂可以播放。如果想解決這個問題你需要使用，net中的tcp/ip類或udp類來實現(xiàn)，當(dāng)然調(diào)用底層的socket動態(tài)庫也可以解決這個問題。
