ASP.NET记住登陆用户名的具体实现

…

<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"/>

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    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();
        }
…
}