public string Login <T>(T entity, out T t) where T : UserModel
{
t = default(T);
var model = LoginDataAccess.GetUserModel(entity);
if (model == null || String.IsNullOrEmpty(model.UserCode))
{
return("您输入的用户名不存在");
}
if (model.PassWord != entity.PassWord)
{
return("您输入的密码不正确");
}
t = model as T;
return("OK");
}