Set fix location for windows form using C#

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Consider there is a windows form.I need to give specific location(always) to this windows form(Ex: right top corner on desktop). If form will dragged by the user,after release the mouse, form must go to the same place. Please somebody help me.

Posted 30-Nov-13 2:32am

NISHAN SANDEEPA

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2 solutions

Solution 2

In this case I think you are not choosing the right design option for the task at hand.

If you want a Form to never be moved, then why allow it to be moved: why not get rid of the TitleBar through using various Form properties like FormBorderStyle, setting 'Text of the Form to an empty string, set the MinimizeBox, MaximizeBox, ControlBox, etc., to the appropriate values.

If the Form has a TitleBar, and you leave the ControlBox, MinimizeBox, and MinimizeBox, decorations in place, there is no way you are going to be able to cancel the user's ability to move the Form around: yes, you can "snap it" back in place by over-riding the Move, or LocationChanged EventHandlers, but the user is still going to be able to drag-around an empty Rectangle. This is not a good thing.

fyi: when a Form is moved, the 'Move Event is raised before the LocationChanged Event.

You could use the Windows API/pInvoke to prevent Form movement: less than 5 seconds using Google turned up this: "Creating a immovable windows’ form in c#" [^]. Note: I haven't tried this code.

Other issues you raise can be addressed by simply setting the Form's MinimumSize and MaximumSize Properties to be identical to the desired Size parameters of the Form.

But, as (I think) my esteemed mentor, and colleague, OriginalGriff, says, you are really going against the grain of Windows UI conventions here.

Posted 30-Nov-13 16:11pm

BillWoodruff

Updated 30-Nov-13 16:15pm

v3

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Behzad Sedighzadeh 20-Sep-18 5:25am

Very nice and elegant solution!

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OriginalGriff · Accepted Answer · 2013-11-30T02:45:00

Solution 1

First thing to do: change the Form property StartPostion to Manual.
Then, handle the LocationChanged event:

C#

private void frmMain_LocationChanged(object sender, EventArgs e)
    {
    Location = new Point(0, 0);
    }

You will get quick "flashes" when they try to move it, but the form will always be in the TLHC of the screen. For TRHC it's a little more complex:

C#

private void frmMain_LocationChanged(object sender, EventArgs e)
    {
    Location = new Point(Screen.PrimaryScreen.Bounds.Width - Width, 0);
    }

And you will want to handle the Resize event as well.

Posted 30-Nov-13 2:45am

OriginalGriff

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NISHAN SANDEEPA 30-Nov-13 9:39am

Thanks OriginalGriff...I need to get another thing.I need to give maximum width to the form(Ex:300px). When user try to maximize the form form height must be equal to the desktop height and form width must be equal to 300px.Please give me some advice or some chunk of code.

OriginalGriff 30-Nov-13 9:52am

Handle the Resize event, and set the Width and Height properties!

(But be aware - you are going to annoy a lot of users like me, who like things where I put them, and the size I select...)