HTTP长连接的例子

来源:互联网 发布:易语言编程学习 编辑:程序博客网 时间:2024/05/16 11:00
 
<html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title>    </head><body>    <form id="form1" runat="server">    <asp:TextBox ID="txt" runat="server">    </asp:TextBox>    <asp:Button ID="btn" runat="server" Text="提交" OnClientClick="document.getElementById('ifr').src='Handler.ashx';return false;" />    <iframe id="ifr"></iframe>    <script type="text/javascript">        var callBack = function (val) {            document.getElementById('<%=txt.ClientID %>').value += val;        }    </script>    </form></body></html>

 

Handler.ashx.cs

public void ProcessRequest(HttpContext context){    context.Response.ContentType = "text/plain";    for (int i = 0; i < 20; i++)    {        context.Response.Write("<script type='text/javascript'>parent.callBack(" + i.ToString() + ");</script>");        context.Response.Flush();        System.Threading.Thread.Sleep(1000);    }}

原创粉丝点击