Question

我正在尝试获取当前登录用户的用户ID。这是我的代码：

public int GetUserID(string _UserName)
    {
        using (var context = new TourBlogEntities1())
        {
            var UserID = from s in context.UserInfoes
                         where s.UserName == _UserName
                         select s.UserID;
            return  Int32.Parse(UserID.ToString()); //error is showing here

        }
    }

我正在使用此控制器从我的控制器调用该方法：

public ActionResult NewPost(NewPost model)
   {
       var Business = new Business();
       var entity = new Post();
       entity.PostTitle = model.PostTitle;
       entity.PostStory = model.PostStory;
       entity.UserID = Business.GetUserID(User.Identity.Name);



       Business.NewPost(entity);
       Business.ViewPost(entity);
       return View("ViewPost", model);

   }

错误显示为“输入字符串格式不正确”。请帮忙。感谢。

Answer 1

您的查询返回IEnumerable。您只需要获得单个记录：

using (var context = new TourBlogEntities1())
{
    var userIds = from s in context.UserInfoes
                 where s.UserName == _UserName
                 select s.UserID;
    return userIds.Single();
}

顺便说一下，如果有超过1条符合条件的记录，.Single()方法将抛出异常。希望您对数据库中的用户名字段有唯一约束。

Answer 2

 CreatedBy = this.HttpContext.User.Identity.Name,

如何获取登录用户的userID？

2 个答案: