Style not taken in account on GridViewColumn ToolTip

So I have the following problem :

In my ListView, I want to add ToolTips to specific GridViewColumns. Sometimes these ToolTips are empty, and I need to hide them.

When I have a ToolTip on a ListView Line, I encounter no problem doing the following in my App.xaml file:

<Style TargetType="ToolTip">
   <Style.Triggers>
      <Trigger Property="Content" Value="{x:Static sys:String.Empty}">
         <Setter Property="Visibility" Value="Collapsed" />
      </Trigger>
      <Trigger Property="Content" Value="{x:Null}">
         <Setter Property="Visibility" Value="Collapsed" />
      </Trigger>
   </Style.Triggers>
</Style>

But in the case a ToolTip is applied to only one column of my ListView, my XAML is the following :

<GridViewColumn Header="{x:Static p:Resources.Name}" Width="100">
   <GridViewColumn.CellTemplate>
      <DataTemplate>
         <Grid>
            <TextBlock Text="{Binding Path=Name}" Tag="{Binding Name}" 
                       MouseMove="mouseOverNameRepere">
               <TextBlock.ToolTip>
                   <StackPanel>
                      <Grid>
                         <TextBlock Grid.Column="0" 
                                    Text="{Binding Path=ToolTipModifications}" 
                                    TextAlignment="Left" HorizontalAlignment="Left"/>
                      </Grid>
                   </StackPanel>
               </TextBlock.ToolTip>
            </TextBlock>
         </Grid>
      </DataTemplate>
   </GridViewColumn.CellTemplate>
</GridViewColumn>

How can I hide the ToolTip when it is empty? The code in my App.xaml is not working. Also tried to do it in code behind :

TextBlock item = (TextBlock)sender;
ToolTip toolTip = (ToolTip)item.ToolTip;

But second line gives me an exception as item.ToolTip is a StackPanel object and cannot be converted? In fact I calculate the ToolTip content only when I enter the TextBox element, so I thought I would then check and apply toolTip.Visibility at this moment, but I couldn't.

Your Style should work if you set the ToolTip property of the TextBlock like this:

<TextBlock Text="{Binding Path=Name}" Tag="{Binding Name}" MouseMove="mouseOverNameRepere" 
           ToolTip="{Binding Path=ToolTipModifications}" />

Style not taken in account on GridViewColumn ToolTip, Style not taken in account on GridViewColumn ToolTip. wpf listview c# listbox gridview wpf gridview dynamic columns binding xaml listview header wpf listbox​  What I'm seeing is that it isn't popping up the Tooltip when the text is blank (good), but when there is text, it pops up a black rectangle. Without the Style setting for the tooltip the text box pops up OK (except it pops up for blank text too). When I remove. Background="Black" on the border styling then I don't see anything popup.

Use Rectangle instead of Tooltip

<GridViewColumn Header="{x:Static p:Resources.Name}" Width="100">
    <GridViewColumn.CellTemplate>
        <DataTemplate>
            <Grid>
                <TextBlock Text="{Binding Path=Name}" Tag="{Binding Name}"/>
                <Rectangle Fill="Transparent" ToolTipService.ToolTip="{Binding Path=ToolTipModifications}" MouseEnter="UIElement_OnMouseEnter"/>
            </Grid>
        </DataTemplate>
    </GridViewColumn.CellTemplate>
</GridViewColumn>

Then check if ToolTipModifications is empty in MouseEnter event

private void UIElement_OnMouseEnter(object sender, MouseEventArgs e)
{
    if (sender is Rectangle rectangle)
    {
        if (string.IsNullOrEmpty(rectangle.ToolTip.ToString()))
        {
            rectangle.Visibility = Visibility.Collapsed;
        }
    }
}

WPF DataGrid | Trimmed Text Tooltips, Learn how to specify whether or not a tooltip should be shown when the text of a property, the following scenarios should be taken into account: If you set the  For example, if a ContentTemplate is set on the GridViewColumnHeader object and the HeaderTemplateSelector is set on the associated GridViewColumn, the ContentTemplate takes precedence. In this scenario, the HeaderTemplateSelector has no effect.

Please try this Code


<DataGridTextColumn Width="200" Binding="{Binding Name}">
    <DataGridTextColumn.ElementStyle>
        <Style TargetType="{x:Type TextBlock}" BasedOn="{StaticResource TextBlockDefaultStyle}">
            <Setter Property="ToolTip" Value="{Binding Name}">
            <Setter Property="ToolTipService.ShowDuration" Value="6000"> 
        </Style> 
    </DataGridTextColumn.ElementStyle> 
</DataGridTextColumn> 

WPF DataGrid | Add ToolTip for Columns and Headers, You can define the DataTemplate as a StaticResource and then directly assign the ToolTipTemplate property of the GridViewColumn. ToolTip for a column's  if mouse hover Student1 then i want to display tooltip as a Student1. Posted 8-Oct-13 19:46pm. amnk.info. Updated 8-Oct-13 19:47pm v4. Add a Solution. 6 solutions.

GridViewRowPresenter Class (System.Windows.Controls , The following example shows how to use a GridViewRowPresenter to style rows in a <GridViewColumn Header="Name" DisplayMemberBinding="{Binding corresponds to hit test results, which take element compositing into account. This property is not relevant if the element was not created through a template. wpf grid tooltip not showing. Tag: wpf,image. I have an image, and I want to show different tool tip when hover over the image section and the image has 4 sections.

GridView Column Header Styles and Templates Overview, GridView Column Header Styles and Templates Overview. 03/30/2017 ToolTip​. Properties, ColumnHeaderToolTip, Not applicable, ToolTip. The ElementName binding does not work when used in column Header or CellTemplate. The problem comes from the fact that binding engine uses FindName method on FrameworkElement to find the target just once. So when element is loaded with LoadContent() – the element is not yet in the visual tree and FindName fails.

ListView with a GridView, By specifying a CellTemplate, we take full control of how the content is rendered within the specific column cell. The GridViewColumn will use the  Resource's height is not scaled along with the entire form if the ResourceHeight property was changed at design time. The day header disappears on scrolling during animation. The incorrect "Forward" icon after upgrading to v20.1. The ShowMoreButtons property value is not taken into account in Day View.

Comments
  • I guess you don't need the StackPanel and the Grid in your tool tip, do you?
  • you can set the tooltip to null, then it won't show.
  • Possible duplicate of XAML for WPF: Hide ToolTip Popup when blank Tooltip text
  • Your Style should work if you set the ToolTip property of the TextBlock like this: <TextBlock Text="{Binding Path=Name}" Tag="{Binding Name}" MouseMove="mouseOverNameRepere" ToolTip="{Binding Path=ToolTipModifications}" />
  • @dymanoid in fact in that example I don't need StackPanel and Grid, just need to put a TextBlock, the StackPanel and Grid are here just because I took the code from another ToolTip. I had two answers so I will try them now
  • perfect thanks, I also took a look at the 2 other answers, and confirm your answer is from far the simpliest. Thanks (just will look at the proposal of icebat that is interesting solution, but more complicated than yours).
  • Solution is also working good thanks, bad I can select only good answer, and (on my point of view) mm8 is better as it is much easier, and I can apply my Style automatically. Thanks anyway for your time
  • You should not only provide some code snippet, but also explain why it is a good solution,
  • @Rakesh Dhamejani in fact your answer looks very similar to mm8 comment higher, but much more longer code, and I don't understand all of the code.