CODEWITHSUNDEEP
c#wpfxaml
cptJack44
cptJack44

Reputation: 17

How to binding combobox to tooltip wpf

I have a problem when trying binding from combobox to tooltip. I want to bind SelectedValue to tooltip and add a string before SelectedValue on tooltip. EX: SelectedValue: ID_001. Tooltip = Your ID: ID_001. My xaml:

<ComboBox ToolTip="{Binding ElementName=cbb_ma_kh, Path=SelectedValue}"  
          Height="32" 
          Margin="115,39,24,0" 
          Name="cbb_ma_kh" 
          VerticalAlignment="Top" 
          Grid.ColumnSpan="2" />

Thanks so much

Upvotes: 1

Views: 1375

Answers (1)

Funk
Funk

Reputation: 11221

As suggested in the comments, the simplest solution would be a Converter to prepend the text.

<ComboBox 
    ItemsSource="{Binding Ids}"
    ToolTip="{Binding SelectedValue, 
                      RelativeSource={RelativeSource Self}, 
                      Converter={StaticResource StringConverter}}"         
    ...
    >

Building the string in XAML is a bit trickier. ElementName and RelativeSource no longer work once you get inside the <ComboBox.ToolTip> ... </ComboBox.ToolTip>. So you would have to bind the SelectedValue to your DataContext to access it later on.

<ComboBox 
    ItemsSource="{Binding Ids}"
    SelectedValue="{Binding SelectedIdValue}"
    ...
    >
    <ComboBox.ToolTip>
        <ToolTip 
            Content="{Binding SelectedIdValue}"
            ContentStringFormat="Your ID: {0}"
            />
    </ComboBox.ToolTip>
</ComboBox>

Upvotes: 1

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