这里我给大家提供一个很实用的例子，就是在线发送ICQ信息。想一想我们在网页上直接给朋友发送ICQ信息，那是多么美妙的事情啊。呵呵，在吹牛啊，其实ICQ本来就有在线发送的代码，不过，这些都是AOL给你写好的代码，多没有意思啊。还是自已写的比较好，呵呵,废话少说，大家来看代码吧

＜% @ Page Language="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，在这里显示信息";
}

public void Send_Click(Object sender,EventArgs e)
{
string sendmsg;
string commandmsg;
file://首先取得要发送的信息
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";
file://然后就是组装全部的信息
sendmsg="POST /scripts/WWPMsg.dll HTTP/1.1 ";
sendmsg += "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,";
sendmsg += " application/vnd.ms-excel,";
sendmsg += " application/msword, application/vnd.ms-powerpoint, */* ";
sendmsg += "Accept-Language: zh-cn ";
sendmsg += "Content-Type: application/x-www-form-urlencoded ";
sendmsg += "Accept-Encoding: gzip, deflate ";
sendmsg += "User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 95) ";
sendmsg += "Host: wwp.icq.com ";
sendmsg += "Content-Length: " + commandmsg.Length + " ";
sendmsg += "Connection: Keep-Alive ";
sendmsg += commandmsg + " ";

Byte[] arrMsg=Encoding.Default.GetBytes(sendmsg.ToCharArray());
file://需要发送的信息处理完毕

file://======下面就是发送这些信息=====
file://首先是建立一个TCPClient 对象
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消息发送成功";
}
else
{
ICQ_Show.Text="ICQ消息发送不成功";
}

}
else
{
ICQ_Show.Text="ICQ消息发送不成功，无法联结ICQ服务器";
}
file://关闭TCP联结
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＞＜br＞＜/tr＞
＜tr＞＜td align=center colspan=2＞发送ICQ信息＜/td＞＜/tr＞
＜tr＞＜td＞您的ICQ号:＜/td＞＜td＞＜asp:TextBox id="ICQ_Number" runat="server" /＞＜/td＞＜/tr＞
＜tr＞＜td＞您的网名:＜/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＞发送主题:＜/td＞＜td＞＜asp:TextBox id="ICQ_Subject" runat="server" /＞＜/td＞＜/tr＞
＜tr＞＜td＞发送内容:＜/td＞＜td＞＜asp:TextBox id="ICQ_Message" runat="server" /＞＜/td＞＜/tr＞
＜tr＞＜td＞＜asp:Button OnClick="Send_Click" Text="发送ICQ信息" RunAt="server" /＞＜/td＞＜/tr＞
＜/table＞
＜/form＞

＜/body＞
＜/html＞