以编程方式最大化窗口并防止用户更改窗口状态

Question

How do I maximize a window programmatically so that it cannot be resized once it reaches the maximized state (for example, maximize Internet Explorer and see it)?

I set FormWindowState property as

this.WindowState = FormWindowState.Maximized;
this.MaximizedBounds = (x,y);

but it doesn't work. How do I do this?

The window I want to maximize is a window in my application.

Answer 1

When your form is maximized, set its minimum size = max size, so user cannot resize it.

    this.WindowState = FormWindowState.Maximized;
    this.MinimumSize = this.Size;
    this.MaximumSize = this.Size;

Answer 2

You were close... after your code of

WindowState = FormWindowState.Maximized;

THEN, set the form's min/max size capacity to the value once its sized out.

MinimumSize = this.Size;
MaximumSize = this.Size;

Answer 3

To stop the window being resizeable once you've maximised it you need to change the FormBorderStyle from Sizable to one of the fixed constants:

FixedSingle
Fixed3D
FixedDialog

From the MSDN Page Remarks section:

The border style of the form determines how the outer edge of the form appears. In addition to changing the border display for a form, certain border styles prevent the form from being sized. For example, the FormBorderStyle.FixedDialog border style changes the border of the form to that of a dialog box and prevents the form from being resized. The border style can also affect the size or availability of the caption bar section of a form.

It will change the appearance of the form if you pick Fixed3D for example, and you'll probably have to do some work if you want the form to restore to non-maximised and be resizeable again.

Answer 4

Change the property WindowState to System.Windows.Forms.FormWindowState.Maximized , in some cases if the older answers doesn't works.

So the window will be maximized, and the other parts are in the other answers.

Answer 5

When I do this, I get a very small square screen instead of a maxed screen. Yet, when I only use the FormWindowState.Maximized, it does give me a full screen. Why is that?

        public partial class Testscherm : Form
    {
            public Testscherm()

            {

                    this.WindowState = FormWindowState.Maximized;
                    this.MaximizeBox = false;
                    this.MinimizeBox = false;
                    this.MinimumSize = this.Size;
                    this.MaximumSize = this.Size;
                    this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
                    InitializeComponent();


            }

Answer 6

To programmatically maximize the windowstate you can use:

 this.WindowState = FormWindowState.Maximized;
 this.MaximizeBox = false;