這里我給大家提供一個很實用的例子,就是在線發送ICQ信息。想一想我們在網頁上直接給朋友發送ICQ信息,那是多么美妙的事情啊。呵呵,在吹牛啊,其實ICQ本來就有在線發送的代碼,不過,這些都是AOL給你寫好的代碼,多沒有意思啊。還是自已寫的比較好,呵呵,廢話少說,大家來看代碼吧 
<% @ Page Langua 
ge="C#" %> 
<% @ Assembly Name="System.Net" %> 
<% @ Import Namespace="System.Net" %> 
<% @ Import Namespace="System.Net.Sockets" %> 
<% @ Import Namespace="System.IO" %> 
<% @ Import Namespace="System.Text" %> 
<Script Language="C#" Runat="Server"> 
public void Page_Load(Object src,EventArgs e) 
{ 
ICQ_Show.Text="如果提交后,在這里顯示信息";  
} 
public void Send_Click(Object sender,EventArgs e) 
{ 
string sendmsg; 
string commandmsg; 
//首先取得要發送的信息 
commandmsg = "from="+ICQ_Name.Text+"&fromemail="+ICQ_Email.Text+"&subject=";  
commandmsg +=  ICQ_Subject.Text+"&body="+ICQ_Message.Text+"&to="+ICQ_Number.Text  
commandmsg +=  "&Send=Send+Message"; 
//然后就是組裝全部的信息 
sendmsg="POST /scripts/WWPMsg.dll HTTP/1.1/r/n"; 
sendmsg += "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,"; 
sendmsg += " application/vnd.ms-Excel,"; 
sendmsg += " application/msWord, application/vnd.ms-Powerpoint, */*/r/n"; 
sendmsg += "Accept-Language: zh-cn/r/n"; 
sendmsg += "Content-Type: application/x-www-form-urlencoded/r/n"; 
sendmsg += "Accept-Encoding: gzip, deflate/r/n"; 
sendmsg += "User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 95)/r/n"; 
sendmsg += "Host: wwp.icq.com/r/n"; 
sendmsg += "Content-Length: " + commandmsg.Length + "/r/n"; 
sendmsg += "Connection: Keep-Alive/r/n/r/n"; 
sendmsg += commandmsg + "/r/n/r/n"; 
Byte[] arrMsg=Encoding.Default.GetBytes(sendmsg.ToCharArray()); 
//需要發送的信息處理完畢 
//======下面就是發送這些信息===== 
//首先是建立一個TCPClient 對象 
TCPClient tcpc=new TCPClient(); 
if(0==tcpc.Connect("wwp.icq.com",80)) 
{ 
Stream sm = tcpc.GetStream(); 
sm.Write(arrMsg,0,sendmsg.Length); 
StreamReader sr=new StreamReader(tcpc.GetStream(),Encoding.Default); 
string strRev=sr.ReadLine(); 
if(strRev.IndexOf("OK")!=-1) 
{ 
ICQ_Show.Text="ICQ消息發送成功"; 
} 
else 
{ 
ICQ_Show.Text="ICQ消息發送不成功"; 
} 
} 
else 
{ 
ICQ_Show.Text="ICQ消息發送不成功,無法聯結ICQ服務器"; 
} 
//關閉TCP聯結 
tcpc.Close(); 
} 
</script> 
<html> 
<meta http-equiv="Content-Language" content="zh-cn"> 
<head> 
<title></title> 
</head> 
<body> 
<form runat="server" > 
<table> 
<tr><td align=center colspan=2> 
      <asp:Label id="ICQ_Show" runat="server" ForeColor="red" /></td></tr> 
<tr><td> 
</tr> 
<tr><td align=center colspan=2>發送ICQ信息</td></tr> 
<tr><td>您的ICQ號:</td><td><asp:TextBox id="ICQ_Number" runat="server" /></td></tr> 
<tr><td>您的網名:</td><td><asp:TextBox id="ICQ_Name" runat="server" /></td></tr> 
<tr><td>您的Email:</td><td><asp:TextBox id="ICQ_Email" runat="server" /></td></tr> 
<tr><td>發送主題:</td><td><asp:TextBox id="ICQ_Subject" runat="server" /></td></tr> 
<tr><td>發送內容:</td><td><asp:TextBox id="ICQ_Message" runat="server" /></td></tr> 
<tr><td><asp:Button OnClick="Send_Click" Text="發送ICQ信息" RunAt="server" /></td></tr> 
</table> 
</form> 
</body> 
</html> 
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