转换类型(Conversion type)

 我有以下问题。 
 我有一门课“Instellingen”，这是另外三门课的一门课 
 
    public class Instellingen
    {
        private int _ID;
    }
    public class Class1: Button
    {
        private Instellingen _Instellingen;
    }
    public class Class2 : Label
    {
        private Instellingen _Instellingen;
    }
    public class Class3 : TextBox
    {
        private Instellingen _Instellingen;
    }
 
 如果我有另一个班级，那就使用其他班级（但它可以是这三个班级中的任何班级）我是否必须使用一个开关？ 还是有更简单的方法？ 
 
    public class AnotherClass
    {
        public AnotherClass ()
        {
            GetInstellingenFromClass(new Class1());
            GetInstellingenFromClass(new Class2());
            GetInstellingenFromClass(new Class3());
        }
        private void GetInstellingenFromClass(Control c)
        {
            switch (c.GetType.ToString())
            {
                case "Class1":
                    Class1 klasse = (Class1) c;
                    //Do something with the _Instellingen of this class
                    break;
                case "Class2":
                    Class2 klasse2 = (Class2) c;
                    //Do something with the _Instellingen of this class
                    break;
                case "Class3":
                    Class3 klasse3 = (Class3)c;
                    //Do something with the _Instellingen of this class
                    break;

            }
        }
    }
 
 （是否存在某些东西，所以我可以像c._Instellingen那样做 - >而不是先将它转换为正确的类型，这与c的类型无关？） 
 
 我希望你能理解我的问题。 
 
 谢谢 

I've got the following question.
 I've got one class "Instellingen" that's a field in 3 other classes
 
    public class Instellingen
    {
        private int _ID;
    }
    public class Class1: Button
    {
        private Instellingen _Instellingen;
    }
    public class Class2 : Label
    {
        private Instellingen _Instellingen;
    }
    public class Class3 : TextBox
    {
        private Instellingen _Instellingen;
    }
 
If I've got another class, that uses the other classes (but it can be anyone of this 3 classes) Do i have to use a switch? or is there an easier way?
 
    public class AnotherClass
    {
        public AnotherClass ()
        {
            GetInstellingenFromClass(new Class1());
            GetInstellingenFromClass(new Class2());
            GetInstellingenFromClass(new Class3());
        }
        private void GetInstellingenFromClass(Control c)
        {
            switch (c.GetType.ToString())
            {
                case "Class1":
                    Class1 klasse = (Class1) c;
                    //Do something with the _Instellingen of this class
                    break;
                case "Class2":
                    Class2 klasse2 = (Class2) c;
                    //Do something with the _Instellingen of this class
                    break;
                case "Class3":
                    Class3 klasse3 = (Class3)c;
                    //Do something with the _Instellingen of this class
                    break;

            }
        }
    }
 
(does there exists something so i can just do something like c._Instellingen --> without converting it first to the right type, where it doesn't matter what type c is?)
 
I hope you understand my question.
 
Thanks

原文：https://stackoverflow.com/questions/2507989