How do I force showing a tooltip in WPF

Question

I'd like to show a tooltip when I move the mouse. Here is my code:

 private void Grid_MouseMove(object sender, MouseEventArgs e)
        {
            Grid grid = (Grid) sender;
            if (e.GetPosition(grid).X < 100)
                grid.ToolTip = e.GetPosition(grid).X.ToString();
            else
                grid.ToolTip = null;
        }

However, the tooltip disappears after I click on the grid.

Is there a way to force showing the tooltip?

score 8 · Answer 1 · answered Sep 03 '13 at 12:45

8

var oldTT = SomeElement.ToolTip as ToolTip;
if (oldTT != null) oldTT.IsOpen = false;
SomeElement.ToolTip = new ToolTip
{
     Content = "Lalalalala",
    IsOpen = true,
};

or

var tt = SomeElement.ToolTip as ToolTip;
if (tt != null) tt.IsOpen = true;

answered Sep 03 '13 at 12:45

tmt

686
2
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`ToolTip` in wpf is only `object`. This code is probably for Winforms ToolTip. – Gerard Mar 20 '14 at 14:41
1

@Gerard , of course .ToolTip-property has type of object like Label.Content. But when you setting a value with a ToolTip-type to it you can easily access to its properties like .IsOpen or Content. Tooltips properties are binded by default. – tmt Sep 25 '14 at 15:35

score 3 · Answer 2 · answered Aug 04 '14 at 19:12

TooltipService.ShowDuration works, but you must set it on the object having the Tooltip, like this:

   <Label ToolTipService.ShowDuration="120000" Name="lblTooltip"  Content="Shows tooltip">
<Label.ToolTip>
    <ToolTip>
        <TextBlock>Hi world!</TextBlock>
    </ToolTip>
</Label.ToolTip>

How do I force showing a tooltip in WPF

2 Answers2