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Questionhow to show data in combobox from database in silverlight Pin
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QuestionWPF DataGrid ComboBox Column Binding Problem Pin
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QuestionWPF - Understanding Binding Syntax Pin
Kevin Marois20-Aug-13 8:29
professionalKevin Marois20-Aug-13 8:29 
I am working with a datagrid with a combobox, and it took me 3 hours to get it working, and that's only after I stumbled across an example.

So now I have this:

<DataGrid Grid.Row="1"
           Grid.Column="0"
           ItemsSource="{Binding JobPhases}"
           SelectedItem="{Binding SelectedJobPhase}"
           SelectionMode="Single"
           SelectionUnit="Cell"
           CanUserAddRows="False"
           CanUserReorderColumns="False"
           CanUserResizeColumns="True"
           CanUserResizeRows="False"
           CanUserSortColumns="True"
           AutoGenerateColumns="False"
           AlternatingRowBackground="Gainsboro"
           IsSynchronizedWithCurrentItem="True"
           AlternationCount="2"
           FontSize="12"
           IsReadOnly="False"
           FontWeight="Normal"
           FontStyle="Normal">

     <DataGrid.Columns>

         <DataGridComboBoxColumn Header="Phase Type"
                                 SelectedItemBinding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.SelectedJobPhaseType}"
                                 DisplayMemberPath="Caption"
                                 Width="150">

             <DataGridComboBoxColumn.EditingElementStyle>
                 <Style TargetType="{x:Type ComboBox}">
                     <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.JobPhaseTypes}"/>
                     <Setter Property="IsReadOnly" Value="True"/>
                     <Setter Property="StaysOpenOnEdit" Value="True" />
                 </Style>
             </DataGridComboBoxColumn.EditingElementStyle>

             <DataGridComboBoxColumn.ElementStyle>
                 <Style TargetType="{x:Type ComboBox}">
                     <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.JobPhaseTypes}"/>
                 </Style>
             </DataGridComboBoxColumn.ElementStyle>

         </DataGridComboBoxColumn>

     </DataGrid.Columns>

 </DataGrid>


The question I have is - can someone explain the syntax in the binding part?

What does 'RelativeSource' mean, and 'FindAncestor' and 'AncestorType'??

Many thanks!
If it's not broken, fix it until it is

AnswerRe: WPF - Understanding Binding Syntax Pin
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QuestionWPF/MVVM DataGrid Set Focus to Cell in Edit Mode Pin
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QuestionMaximize and Restore Buttons Pin
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QuestionSilverlight and Android Application Interaction Pin
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