RE: Templated Combobox Tooltips from Items

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Hi Wts,

You can use a converter in the template as well. For example:

[XAML code]

<Window x:Class="WpfApplication4.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation";
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml";
xmlns:local="clr-namespace:WpfApplication4"
Title="Window1" Height="300" Width="300">

<Window.Resources>
<local:MyToolTipConverter x:Key="myTooltipConverter"/>

<Style TargetType="ComboBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBox}">
<Border BorderBrush="Red" BorderThickness="3">
<Grid>
<ToggleButton Name="ToggleButton" />
<ContentPresenter Content="{TemplateBinding
SelectionBoxItem}">
<ContentPresenter.ToolTip>
<TextBlock Margin="0,0,100,50"
x:Name="textBlock"
Text="{TemplateBinding
SelectedItem, Converter={StaticResource myTooltipConverter}}"/>
</ContentPresenter.ToolTip>
</ContentPresenter>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

</Window.Resources>

<DockPanel>

<ComboBox x:Name="combo2" SelectedIndex="0" DockPanel.Dock="Top"
Height="23" Width="251">
<ComboBoxItem ToolTip="FirstItem">one</ComboBoxItem>
<ComboBoxItem ToolTip="SecondItem">two</ComboBoxItem>
<ComboBoxItem ToolTip="ThirdItem">three</ComboBoxItem>
</ComboBox>

</DockPanel>

</Window>

===================================

[C# code]

namespace WpfApplication4
{
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
}

[ValueConversion(typeof(object), typeof(String))]
public class MyToolTipConverter : IValueConverter
{
public object Convert(object value, Type targetType, object
parameter, CultureInfo culture)
{
ComboBoxItem selectedItem = (ComboBoxItem)value;
return selectedItem.ToolTip;
}

public object ConvertBack(object value, Type targetType, object
parameter, CultureInfo culture)
{
return value;
}
}
}

Should you have any question, please don't hesitate to let me know.

Sincerely,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

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