/// <summary>
/// BLL_GetName()方法，登录判断
/// </summary>
/// <param name="name">登录用户名</param>
/// <param name="pwd">登录密码</param>
/// <returns>是否登录成功</returns>
public LoginState GetName(string name, string pwd)
{
DAL.Login login = new DAL.Login();
Model.Student model = login.GetName(name);
//把用户输入的pwd进行MD5转换，再与数据库得到的pwd(MD5加密后的)对比
//1）添加引用；2）添加namespace:using System.Web.Security;
pwd = FormsAuthentication.HashPasswordForStoringInConfigFile(pwd, "md5").ToLower();
//微软提供的FormsAuthentication类的，HashPasswordForStoringInConfigFile()方法，会把加密后的MD5字符串自动
//转成大写，故：要ToLower()
if (model == null)
{
return LoginState.NoName;
}
else
{
if (model.Password == pwd)
{
return LoginState.OK;
}
else
{
return LoginState.IncorrectPwd;
}
}
}
