?using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Windows.Forms;
using localhost;

public partial class AdminLogin : System.Web.UI.Page
{
    private string connString;

    /**
     * 方法 ButtonAdminLogin_Click 處理管理員登錄事件
     *      對管理員信息的驗證,并由驗證結果作出動作
     * 參數: 事件的發送者sender, 事件e
     * 返回值: 無
    */
    protected void ButtonAdminLogin_Click(object sender, EventArgs e)
    {
        // 實例化一個數據庫連接對象
        Service1 db = new Service1();

        // 讀取用戶錄入的用戶名和密碼
        string adminUsername = TextBoxUsername.Text.Trim();
        string adminPassword = TextBoxPassword.Text;
        // 若身份驗證失敗,LabelCheckInfo顯示錯誤信息,這個Label初始時不可見
        LabelCheckInfo.Visible = false;

        // 檢查密碼，若正確則跳轉
        if (db.CheckUserPwd(adminUsername, adminPassword))
        {
            // 將用戶名和密碼存入會話
            Session["adminUsername"] = adminUsername;
            Session["adminPassword"] = adminPassword;

            // 密碼正確，并且用戶選擇了保存Cookie
            if (CheckBox1.Checked)
            {
                // 實例化一個Cookie,保存管理員用戶名及密碼
                HttpCookie adminCookie = new HttpCookie("admin");
                adminCookie.Values["adminUsername"] = adminUsername;
                adminCookie.Values["adminPassword"] = adminPassword;

                // 由用戶選擇的保存時間,設置Cookie的有效期 
                switch (DropDownList1.SelectedValue)
                {
                    case "1d":
                        adminCookie.Expires = DateTime.Today.AddDays(1);
                        break;
                    case "1m":
                        adminCookie.Expires = DateTime.Today.AddMonths(1);
                        break;
                    case "3m":
                        adminCookie.Expires = DateTime.Today.AddMonths(3);
                        break;
                    case "6m":
                        adminCookie.Expires = DateTime.Today.AddMonths(6);
                        break;
                    case "1y":
                        adminCookie.Expires = DateTime.Today.AddYears(1);
                        break;
                    default:
                        break;
                }
                // 保存Cookie
                Response.Cookies.Add(adminCookie);
            }
            // 密碼正確,但未選保存Cookie: 建立一個臨時Cookie用于當前會話,有效期在關閉瀏覽器時止
            else
            {
                HttpCookie tempCookie = new HttpCookie("temp");
                tempCookie.Values["adminUsername"] = adminUsername;
                tempCookie.Values["adminPassword"] = adminPassword;
                Response.Cookies.Add(tempCookie);
            }
            Response.Redirect("AdminDefault.aspx");
        }
        // 身份驗證失敗
        else
        {
            LabelCheckInfo.Visible = true;
        }
        // 關閉數據庫連接
        db.Close();
    }
}