c# change Label (Control) location at runtime

Question

The default tooltip isn't working well for me, so I made a custom tooltip using a Label Control and its 'Visible' property as an error Popup when a key is pressed. So now I'm trying to set the position of the label dynamically, in my case to the location of a textBox, but it always shows up in the upper left corner of the form.

Here's the method:

    void ShowCustomToolTip(string text, Control targetControl, int duration = 1000, int x = 0, int y = 0)
    {
        customToolTip.Text = text;
        customToolTip.Visible = true;

        // the crucial line that needs to be changed, I guess
        customToolTip.Location = new Point(targetControl.Location.X + x, targetControl.Location.Y + y);

        Set.Timer(duration);
        customToolTip.Hide();
    }

How can I accomplish this? Thanks!

Answer 1

The problem is that Control.Location gives your position within the current container. You just need to get the absolute location of the control with respect to the form like this:

void ShowCustomToolTip(string text, Control targetControl, int duration = 1000, int x = 0, int y = 0)
{
    customToolTip.Text = text;
    customToolTip.Visible = true;

    Point absoluteLocation = targetControl.FindForm().PointToClient(
        targetcontrol.Parent.PointToScreen(control.Location));

    // the crucial line that needs to be changed, I guess
    customToolTip.Location = new Point(absoluteLocation.X + x, absoluteLocation.Y + y);

    Set.Timer(duration);
    customToolTip.Hide();
}