Tausif Khan Tausif Khan - 1 month ago 6
C# Question

C# - Show Dialog box at center of its parent

It's been a mess to show a DialogBox at the center of its parent form. Here is a method to show a dialog. I am positioning its parent to center but not able to center the DialogBox

private void OpenForm(Object point, Object height, Object width)
{
FormLoading frm = new FormLoading();
Point temp = (Point)point;
Point location = new Point(temp.X + (int)((int)width) / 2,
temp.Y + (int)((int)height) / 2);
frm.Location = location;
frm.ShowDialog();
}

private void btnView_Click(object sender, EventArgs e)
{
try
{
ThreadStart starter= delegate { OpenForm(currentScreenLocation,
this.Height, this.Width); };
Thread t = new Thread(starter);
t.Start();
////// Some functionality here...
t.Abort();
}
catch (Exception)
{
}
}

Answer

You might want to check the Form.StartPosition property.

http://msdn.microsoft.com/en-us/library/system.windows.forms.form.startposition.aspx

something along the lines of:

private void OpenForm(Form parent)
{
    FormLoading frm = new FormLoading();
    frm.Parent = parent;
    frm.StartPosition = FormStartPosition.CenterParent;
    frm.ShowDialog();
}

This of course requires setting the form's parent.