… <asp:TextBox ID="txtUser_Id" runat="server" MaxLength="4" Width="120px" BorderColor="LightSlateGray" BorderWidth="1px"></asp:TextBox> … <asp:ImageButton ID="btnInsert" runat="server" ImageUrl="~/Images/Login.GIF" OnClick="btnInsert_Click" /> … <asp:CheckBox ID="cbxRemeberUser" runat="server" Text="记住用户名" Font-Size="Small" ForeColor="gray"/> …

    protected void Page_Load(object sender, EventArgs e)     {         if (!IsPostBack)         {             this.txtUser_Id.Focus();             if (!Object.Equals(Request.Cookies["UserID"], null))             {                 //创建一个Cookie对象，实现记住用户名                 HttpCookie readcookie = Request.Cookies["UserID"];                 this.txtUser_Id.Text = readcookie.Value;             }         }     }     private void CreateCookie()     {         //创建一个Cookie对象         HttpCookie cookie = new HttpCookie("UserID");         //判断Checkbox控件是否被选中         if (this.cbxRemeberUser.Checked)         {             //将用户编号存储到创建的Cookie对象中             cookie.Value = this.txtUser_Id.Text;         }         //获取创建的Cookie对象的过期时间         cookie.Expires = DateTime.MaxValue;         //将创建的Cookie对象添加到内部Cookie集合中         Response.AppendCookie(cookie); }     protected void btnInsert_Click(object sender, ImageClickEventArgs e)     { …         if (object.Equals(Request.Cookies["UserID"], null))         {           //调用自定义方法 CreateCookie()存储用户名           CreateCookie();         }         else         {            CreateCookie();         } … }