Aspx比较简单的登录

 1  客户端
 2 <form id="form1" runat="server">
 3     <div>
 4     用户名:<input type="text" name="txtName"  value="<%=UserName %>"/><br />
 5         密码:<input type="password" name="txtPwd" /><br />
 6         <input type="submit" value="登录" />
 7     </div>
 8     </form>
 9 
10 服务器端
11 public partial class Login : System.Web.UI.Page
12     {
13         public string UserName;
14         protected void Page_Load(object sender, EventArgs e)
15         {
16             if (Request.Cookies["userName"] != null)
17             {
18                 string name = Request.Cookies["userName"].Value;
19                 UserName = name;
20                 Response.Cookies["userName"].Value = name;
21                 Response.Cookies["userName"].Expires = DateTime.Now.AddDays(3);
22             }
23             else
24             {
25                 if (IsPostBack)
26                 {
27                    string name= Request.Form["txtName"];
28                    Response.Cookies["userName"].Value = name;
29                    Response.Cookies["userName"].Expires = DateTime.Now.AddDays(3);
30                 }
31             }
32         }
33     }