linq语句出错

Question

我在跟踪LINQ语句时遇到错误

错误

"无法将隐式转换为bool类型转换为字符串

string UserId = Context.Users.Where(x => x.UserName == username).FirstOrDefault(x => x.Id);

这有什么不对？

Answer 1

如果你只想这样的id

string UserId = Context.Users.Where(x => x.UserName == username).Select(g=> g.Id.ToString()).FirstOrDefault();

如果你想要用户这样的对象

   var Usersobj=Context.Users.Where(x => x.UserName == username).FirstOrDefault();