How to move a Winform dialog

My main form launches another as a modal dialog, using .ShowDialog. I want to position this based on the mouse-position, but my attempts to call SetDesktopLocation are having no effect. Is this the right me开发者_如何学Cthod?

Thanks

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In order to set the position of a form programatically before it's visible, you need to set the StartPosition property to Manual, then set the Location property to the desired location.

using(Form toShow = new YourForm())
{
    toShow.StartPosition = FormStartPosition.Manual;
    toShow.Location = MousePosition;

    toShow.ShowDialog();
}

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Also, don't forget that modal dialogues halt execution on other forms until they are closed - so you'll need to do the positioning with the dialogue form itself, not on subsequent lines in the opener - as they won't be called until after the dialogue closes.

Also, check that the StartPosition of the form is set to Manual

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You can try this in the onLoad() method of your new form:

this.Location = new Point(paramX, paramY);

where paramX and paramY are representing the mouse-position.