How to make a property with known and fixed values for a user-defined button?

I have a user-defined button, and it may have a Style property which I choose in properties window a value for it and depending on that value its Image and style will change.

How can I make this property to have some predefined and fixed values in a drop down list in properties window? and selecting a value causes running a method

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-details:

this button may ge开发者_JAVA百科ts specified appearance such pause and play styles. so I made a class for styles:

// style of the button; pause, play, reset, etc
public abstract class ButtonStyle
{
    public abstract Image GetImage();
}
// inherited classes of class ButtonStyle
public class PauseButtonStyle : ButtonStyle
{
    public override Image GetImage()
    {
        return CustomButtonLibrary.Properties.Resources.PauseButton;
    }
}
public class PlayButtonStyle : ButtonStyle
{
    public override Image GetImage()
    {
        return CustomButtonLibrary.Properties.Resources.PlayButton;
    }
}

And there is a method in the button for setting the specified style (pause,play,...):

public void SetStyle(ButtonStyle style)
{
    button1.Image = style.GetImage();                       
}

Now how can I have a property for this custom button in properties window that this property has some default values like pause, play,etc and selecting it causes changing the button's style (with running SetStyle method)

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I would make an enum and expose that as the Style property. Then, have a internal dictionary that keys off the enum value to choose the appropriate ButtonStyle object to pass to your SetStyle method.

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I think all you need to do is inherit the Button class and add your Enum:

public class ButtonEx : Button
{
  public enum ButtonStateStyles
  {
    None,
    Pause,
    Play,
  }

  private ButtonStateStyles _ButtonStateStyle = ButtonStateStyles.None;

  public ButtonStateStyles ButtonStateStyle
  {
    get { return _ButtonStateStyle; }
    set
    {
      _ButtonStateStyle = value;

      switch (_ButtonStateStyle)
      {
        case ButtonStateStyles.Pause:
          {
            base.Image = new PauseButtonStyle().GetImage();
            break;
          }
        case ButtonStateStyles.Play:
          {
            base.Image = new PlayButtonStyle().GetImage();
            break;
          }
        default:
          {
            base.Image = null;
            break;
          }
      }
    }
  }
}