C# 错误 - 非静态字段需要对象引用

Question

I am very new to c# but I am stuck. I have explained my scenario below.

Now I have a list of enums like this,

public enum Colors
{
   Black,
   Blue,
   Red
}

I have 2 classes with switch statements(I have shown just 1 class since both the classes are similar). Now I am getting an error like this An object reference is requesred for the non-static field, method, or property 'RandomColor.GetColors' . Also I could have used the answer version in all my class that uses this switch statement but since I want to do like changing value in one file and it changes that value in all class for me.

public class RandomColorService
{
   public readonly string _url;

   public RandomColorService()
   {
      switch (RandomColor.GetColors)
      {
        case Colors.Black:
            _url = "Use url for black color";
            break;
        case Colors.Blue:
            _url = "Use url for blue color";
            break;
        case Colors.Red:
            _url = "Use url for red color";
            break;
      }
   }
}

Therefore to achieve that I tried to create this class but now If I put static in the below class everything works perfectly, but I am trying to make it more dynamic so that I can change the value of GetColors from different class to a different color. So that it uses the appropriate url in the above class.

public class RandomColor //put static here
{
   public Colors GetColors { get; set; } = Colors.Black; //put static here
}

Can you guys help me with this error?

Answer 1

The most straight forward way to change the value of a property is with a set statement:

var myTestDays = new TestDays();
myTestDays.DayTesting = Days.Sunday;