我做到了，form1将缓慢向左移动。 如何使它从屏幕中心开始？

Question

At the top of Form1 i did:

private IntPtr ID;
private int counter = 0;

In the constructor i did:

ID = this.Handle;
timer2.Enabled = true;

Then in timer2 tick event i did:

private void timer2_Tick(object sender, EventArgs e)
        {
            if (counter <= Screen.PrimaryScreen.Bounds.Right)
                MoveWindow(ID, counter++, 0, this.Width, this.Height, true);
            else
                counter = 0;
        }

But the form start to move from the top left corner at 0,0 to the right. I want the form will start to move from the center of the screen to the left untill it hit the left border/bound and stop and stay there.

How can i do it ?

I found now how to make it to move to the left and stop on the left border/bound:

private void timer2_Tick(object sender, EventArgs e)
        {
            if (counter >= Screen.PrimaryScreen.Bounds.Left)
                MoveWindow(ID, counter--, 0, this.Width, this.Height, true);
            else
                counter = 0;
        }

But how do i make that it will start to move from the middle/center of the screen ? I did in the designer change the property: StartPosition to CenterScreen But the form start to move from the top left corner 0,0

Answer 1

有一个更好的解决方案，只需使用如下protected方法CenterToScreen() ：

this.CenterToScreen();

Answer 2

This is the answer.

x = Screen.PrimaryScreen.Bounds.Bottom - this.Width * 2;
y = Screen.PrimaryScreen.Bounds.Bottom - this.Height * 2;
counter = x;

Then in the timer tick event:

private void timer2_Tick(object sender, EventArgs e)
        {
            if (counter >= Screen.PrimaryScreen.Bounds.Left)
                MoveWindow(ID, counter--, y, this.Width, this.Height, true);
            else
                counter = 0;
        }

Before it the counter-- was set to 0. And instead y it was 0 too. So it's 0,0 this is the location. Now counter and y start location is the middle of the screen.

Thanks.

Answer 3

You could set the StartPosition property of your main WinForm to CenterScreen :

 Form1.StartPosition = FormStartPosition.CenterScreen;

Then if you want it to appear somehow on a different position relative to this screen center, you can play with the Top and Left properties to add or subtract the required number of pixels.

if you need to know the screen bounds:

System.Windows.Forms.Screen.PrimaryScreen.Bounds

or, taking into account the task bar:

System.Windows.Forms.Screen.PrimaryScreen.WorkingArea

...or some variant