首先新建一个简单的login.htm前端页面，利用nvelocity引擎模板。
<body> <form action="Login.ashx" method ="post"> <table> <tr><td>用户名：</td><td><input type ="text" name="UserName" value="$Model.UserName"</td></tr> <tr><td>密码</td><td><input type="password" name="Password" value="$Model.Password"/></td></tr> <tr><td></td><td><input type="submit" name="Login" value="登录" /></td></tr> </table> </form> </body>
public class CommonHelper { /// <summary> /// 用data填充模板渲染生成html返回 /// </summary> /// <param name="templateName"></param> /// <param name="data"></param> /// <returns></returns> public static string RenderHtml(string templateName, object data) { //模版引擎代码 VelocityEngine vltEngine = new VelocityEngine();//实例化一个velocity模版引擎 vltEngine.SetProperty(RuntimeConstants.RESOURCE_LOADER, "file"); vltEngine.SetProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, System.Web.Hosting.HostingEnvironment.MapPath("~/templates"));//模板文件所在的文件夹 vltEngine.Init(); VelocityContext vltContext = new VelocityContext(); vltContext.Put("Model",data);//设置参数，在模板中可以通过$data来引用 //把person对象作为传入p Template vltTemplate = vltEngine.GetTemplate(templateName); System.IO.StringWriter vltWriter = new System.IO.StringWriter(); vltTemplate.Merge(vltContext, vltWriter); string html = vltWriter.GetStringBuilder().ToString();//得到html这个模板 return html; } }
再建立一个login.ashx的一般处理程序。
public class Login : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/html"; string login=context.Request ["Login"]; //取出这个对象，并且盘算是否为空
if (string .IsNullOrEmpty (login )) { //取出cookie中的值
HttpCookie cookie2=context.Request .Cookies["Password"]; HttpCookie cookie=context.Request .Cookies ["UserName"]; string username; if (cookie ==null ) { username = ""; } else { username = cookie.Value; } string password; if (cookie2==null ) { password = ""; } else { password = cookie2.Value; } var data = new { UserName=username,Password=password }; context.Response.Write(CommonHelper .RenderHtml ("Login.htm",data)); } else { string username=context .Request ["UserName"]; //新建cookie
HttpCookie cookie = new HttpCookie("UserName",username); //设定过期的时限
cookie.Expires = DateTime.Now.AddDays(7); context.Response.SetCookie(cookie); //密码的 string password = context.Request["Password"]; //新建一个cookie实例 HttpCookie cookie2 = new HttpCookie("Password", password); //设定周期 cookie2.Expires = DateTime.Now.AddDays(5); //创建响应cookie context.Response.SetCookie(cookie2); context.Response.Write("登陆成功"); } } public bool IsReusable { get { return false; } } } }