How do I force showing a tooltip in WPF
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)开发者_运维知识库
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?
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;
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>
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