ginBtn_Click(object sender,ImageClickEventArgs e)
 {  
  if (UserName.Text == null || UserName.Text == "" || UserName.Text.Length <= 0)
  {
   ShowMessage("用户名称为空，请输入用户名称！");
   return;
  }
  if (Password.Text == null || Password.Text == "" || Password.Text.Length <= 0)
  {
   ShowMessage("用户密码为空，请输入用户密码！");
   return;
  }
  String userId = "";
  String roleId = "";
  ///定义类并获取用户的登陆信息           
  BookShop.User user = new User();
  SqlDataReader recu = user.GetUserLogin(UserName.Text.Trim(),
   BookShop.User.Encrypt(Password.Text.Trim()));
  ///判断用户是否合法
  if (recu.Read())
  {
   userId = recu["UserID"].ToString();
   roleId = recu["RoleID"].ToString();
  }
  recu.Close();
  ///验证用户合法性，并跳转到系统平台
  if ((userId != null) && (userId != ""))
  {
   Session["UserID"] = userId;
   Session["UserName"] = UserName.Text;
   if (roleId != "")
   {
    Session["RoleID"] = roleId;
   }
   //跳转到登录后的第一个页面
   Response.Redirect("~/UserControls/UserLoginPage.aspx");
  }
  else
  {
   ///显示错误信息
   ShowMessage("你输入的用户名称/密码有误，请重新输入！");
  }
 }

书籍信息：

主要功能实现代码：
public int AddBook(string sName,int nCategoryID,string sDesn,string sAuthor,
   string sPublish,DateTime dPublishDate,string sISBN,string sForeword,string sList,
   string sOutLine,DateTime dBuyInDate,decimal dPrice,int nTotalNum,
   string sAttribute1,string sAttribute2,string sAttribute3,
   string sAttribute4,string sAttribute5,stri