如何在C＃中停靠窗体？

Question

I just would like to know if it is possible to dock a windows form on top of the user screen? I have been trying to do this by manually setting the position of my form to the coordinates I want. But using this method, however, allows the user to change the position of the form just by dragging it. I want to make the form docked to the upper portion of the screen since this window form will server as a menu for the project I am making.

Thanks a lot. :)

Answer 1

I would consider using the Control.Dock property along with one of the DockStyle enumeration values.

You might need to play with the Layout too, so that you may layout your form's controls differently depending on the DockStyle selected.

You will need, in my point of view, to consider the Control.Location property so that you get to know which DockStyle value to dock your form with.

EDIT #1

Your Windows Form has a Dock property as it inherits from Control .

Let's consider the following :

1. Each time your form comes closer to your right-side of the screen, for example, or of the MDI container, you want to dock right, right ? (Little word play here... =P) So, you have to subscribe to the Control.LocationChanged event.

    private void myForm_LocationChanged(object sender, EventArgs e) { if (this.Location.X > 900) then this.Dock = DockStyle.Right; else if (this.Location.X < 150) then this.Dock = DockStyle.Left; else if (this.Location.Y > 600) then this.Dock = DockStyle.Bottom; else if (this.Location.Y < 150) then this.Dock = DockStyle.Top; else this.Dock = DockStyle.None; } 

Indeed, instead of constant values, you should use the current desktop resolution and calculate a ratio from it where you want your docking to occur.

***Disclaimer:****This code is provided as-is and has not been tested. This algorithm is hopefully enough to guide you through the docking process as you need it. Further assistance may be brought upon request.* =)

It seems the Form.DesktopLocation property is the righter tool for the job as for your main window, meaning your MDI container, for instance. As for the other windows, I would go along with something that looks like the code sample provided.

Does this help?

EDIT #2

If you want to prevent Form's overlapping, perhaps the Control.BringToFront() method could do it before or after your call to the Control.Show() method, depending on what works best for you.

Answer 2

So after some tweaks I finally was able to get this code working.

this.DesktopLocation = new Point((Screen.PrimaryScreen.Bounds.Width / 2 - 420), 0);

I placed that line below the InitializeComponent() and it docks my form to the center of the screen with whatever resolution values.

Answer 3

By setting the FormBorderStyle of your form to None , you take the drag handle away from the user so they cannot move it via the mouse.

Then you just need to place it where you want.

If you really want to take away the users options you can also set the ShowInTaskbar property to false