控件的边界与设置控件的X，Y，Width，Height有什么区别？

Question

So, lets say I have a panel on a winform and I want it displayed at particular point and should have a specific width and height on the winform. Plus, I want to do it during run-time.

So, what is the difference and the right way to move and set panel's dimensions?

This way:

Panel1.bounds.X:=10;
Panel1.bounds.Y:=10;
Panel1.bounds.width:=100;
Panel1.bounds.height:=103;

Or This way:

Panel1.Left := 10;
Panel1.Top := 10;
Panel1.width:=100;
Panel1.height:=103;

Or Both ways should have the same effect on the panel1.

I am trying to figure out what really is wrong with my program...Although I have asked a question specific to my problem, no one even attempted to answer or even able to leave comment. So, I am asking bits and piece of question to understand my problem.

Answer 1

If you want to set the Bounds , you need to do it with a rectangle. (Please forgive any syntax mistakes in my examples; my Delphi is a little rusty.)

BoundsRect: Rectangle;
BoundsRect.X = 10;
BoundsRect.Y = 10;
BoundsRect.Width := 100;
BoundsRect.Height := 103;
Panel1.Bounds := BoundsRect;

Typically, you'd use that if you want to set or change multiple properties. If you just want to set one or two properties, you can use Width , Top , etc.

One other difference is that every time you set one of those properties (either Bounds , or one of the individual properties), it causes a lot of work behind the scenes (moving and redrawing the window, etc.). Setting the Bounds property from the rectangle will be less work.