/// <summary>
/// 用户单击“登录”按钮事件方法
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void ButtonLogin_Click(object sender, System.EventArgs e)
{
//获取用户在页面上的输入
string userLoginName = TextBoxLoginName.Text; //用户登录名
string password = TextBoxPassword.Text; //密码
User user = new User(); //实例化User类
user.LoadData(userLoginName); //利用User类的LoadData方法，获取用户信息
Session.Add("user_id", user.UserID); //使用Session来保存用户ID信息
if (user.Exist) //如果用户存在
{
if (user.Password == password) //如果密码，转入留言列表页面
{
if (Request.QueryString["in"] == null) //不是从系统内部跳转而来
{
Response.Redirect("BookList.aspx");
}
else//是从系统内部跳转而来
{
Response.Write("<Script Language=JavaScript>history.go(-2);</Script>");
}
}
else //如果密码错误，给出提示，光标停留在密码框中
{
Response.Write("<Script Language=JavaScript>alert(\"密码错误，请重新输入密码！\")</Script>");
}
}
else //如果用户不存在
{
Response.Write("<Script Language=JavaScript>alert(\"对不起，用户不存在！\")</Script>");
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (Session["user_id"] != null)
{
User user = new User();
user.LoadData(Convert.ToInt32(Session["user_id"]));
LabelHello.Text = "您好,<font color=red><b>" + user.LoginName + "</font></b>";
LinkButtonLogin.Text = "离开";
}
else {
LinkButtonLogin.Text = "登录";
}
}
/// <summary>
/// “提交”按钮单击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void ButtonOK_Click(object sender, System.EventArgs e)
{
Hashtable ht = new Hashtable();
ht.Add("LoginName", SqlStringConstructor.GetQuotedString(TextBoxLoginName.Text));
ht.Add("UserName", SqlStringConstructor.GetQuotedString(TextBoxUserName.Text));
ht.Add("Password", SqlStringConstructor.GetQuotedString(TextBoxPassword.Text));
ht.Add("Address", SqlStringConstructor.GetQuotedString(TextBoxAddress.Text));
ht.Add("Zip", SqlStringConstructor.GetQuotedString(TextBoxZip.Text));
User user = new User();
user.Add(ht);
user.LoadData(TextBoxLoginName.Text);
Session.Add("user_id", user.UserID);
Response.Redirect("BookList.aspx");
}