Prevent empty tooltips at a wpf datagrid
- by TheCalendarProgrammer
I am working on a calendar program, which consists mainly of a WPF DataGrid. As there is not always enough space to display all the entries of a day (which is a DataGridCell), a tooltip with all the entries of the day shell appear at mouse over. This works so far with the code snippet shown below. And now the (little) problem: If there are no entries for a day, no tooltip shell pop up. With the code below an empty tooltip pops up.
<DataGridTemplateColumn x:Name="Entry"
IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Grid>
<TextBlock Text="{Binding EntryText}"
Foreground="{Binding EntryForeground}"
FontWeight="{Binding EntryFontWeight}">
</TextBlock>
<TextBlock Text="{Binding RightAlignedText}"
Foreground="Gray"
Background="Transparent">
<TextBlock.ToolTip>
<TextBlock Text="{Binding AllEntriesText}"/>
</TextBlock.ToolTip>
</TextBlock>
</Grid>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
The Databinding is made via
myCalDataGrid.Itemssource = _listOfDays;
in code behind, where a 'Day' is the view model for a single calendar row.
