C#如何从列表中读取变量

Question

我有一个样本列表。

            List<Reminders> remind2 = new List<Reminders>() {
               new Reminders() { Checked = true, Name_re = "Impreza" },
               new Reminders() { Checked = true, Name_re = "Impreza1" },
               new Reminders() { Checked = false, Name_re = "Impreza2" },
               new Reminders() { Checked = true, Name_re = "Impreza3" },
               new Reminders() { Checked = true, Name_re = "Impreza4" },
               new Reminders() { Checked = false, Name_re = "Impreza5" },
               new Reminders() { Checked = true, Name_re = "Impreza6" },
               new Reminders() { Checked = false, Name_re = "Impreza7" }
        };

我只有一个变量，例如"Impreza1“。

如何读取这个变量Checked = true？

Answer 1

如果您只想要一个布尔结果，请使用linq .Any()，即

var text = "Impreza1";
bool isChecked = remind2.Any(x=>x.Name_re==text && x.Checked);

如果您想在变量为true的情况下获取该变量，请尝试以下操作：

var reminder = remind2.FirstOrDefault(x=>x.Name_re==text && x.Checked);
if(reminder!=null)
{
   //its checked..do stuff
}

Answer 2

我认为LINQ让这件事变得非常简单：

    List<Reminders> remind2 = new List<Reminders>() {
           new Reminders() { Checked = true, Name_re = "Impreza" },
           new Reminders() { Checked = true, Name_re = "Impreza1" },
           new Reminders() { Checked = false, Name_re = "Impreza2" },
           new Reminders() { Checked = true, Name_re = "Impreza3" },
           new Reminders() { Checked = true, Name_re = "Impreza4" },
           new Reminders() { Checked = false, Name_re = "Impreza5" },
           new Reminders() { Checked = true, Name_re = "Impreza6" },
           new Reminders() { Checked = false, Name_re = "Impreza7" }
    };
    var name = "Impresa";
    var checkedWithName = from rem in remind2 where rem.Name_re == name && rem.Checked select rem/*.ToList()*/;

如果您需要单个Reminders，您可以在结果上调用Single() (http://msdn.microsoft.com/en-us/library/bb155325(v=vs.110).aspx。

Answer 3

var result = remind2.FirstorDefault(p=> p.Name_re.ToLower().Equals("Impreza1".ToLower());



bool checked = result.Checked;