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trun_gup
280
TemplateField two way binding for combobox selected item
posted

I am using a combobox inside a template field, but when an item is selected, entity linked is not reflected about that. In the below snippet - SelectedFieldName is not set when ever we change anything in combobox

<dataPresenter:TemplateField Name="FieldName" AlternateBinding="{Binding SelectedFieldName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" AlternateBindingRetentionMode="Retain"  Label="FieldName"  >
                                <dataPresenter:TemplateField.DisplayTemplate>
                                    <DataTemplate>
                                        <!--SelectedItem="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type dataPresenter:CellValuePresenter}}, Path=Record.DataItem.SelectedFieldName, Mode=TwoWay,  UpdateSourceTrigger=PropertyChanged}"-->
                                        <ComboBox
                                            SelectedItem = "{editors:TemplateEditorValueBinding Mode=TwoWay}"
                                            ItemsSource="{Binding Source={StaticResource FieldValues}}"
                                          
                                    </DataTemplate>
                                </dataPresenter:TemplateField.DisplayTemplate>
                                <dataPresenter:TemplateField.EditTemplate>
                                    <DataTemplate>
                                        <ComboBox ItemsSource="{Binding Source={StaticResource FieldValues}}"
                                                  SelectedItem ="{editors:TemplateEditorValueBinding Mode=TwoWay}" />
                                    </DataTemplate>
                                </dataPresenter:TemplateField.EditTemplate>
                            </dataPresenter:TemplateField>

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  • 280
    Verified Answer
    posted

    I got it working myself. Changed

    <dataPresenter:TemplateField Name="FieldName" BindingType="Unbound"  Label="FieldName"  >
                                    <dataPresenter:TemplateField.DisplayTemplate>
                                        <DataTemplate>
                                           
                                            <ComboBox 
                                                SelectedItem="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type dataPresenter:CellValuePresenter}}, Path=Record.DataItem.SelectedFieldName, Mode=TwoWay,  UpdateSourceTrigger=PropertyChanged}"
                                                ItemsSource="{Binding Source={StaticResource FieldValues}}" />
                                              
                                        </DataTemplate>
                                    </dataPresenter:TemplateField.DisplayTemplate>
                                    <dataPresenter:TemplateField.EditTemplate>
                                        <DataTemplate>
                                            <ComboBox ItemsSource="{Binding Source={StaticResource FieldValues}}"
                                                      SelectedItem ="{editors:TemplateEditorValueBinding Mode=TwoWay}" />
                                        </DataTemplate>
                                    </dataPresenter:TemplateField.EditTemplate>
                                </dataPresenter:TemplateField>

                                          

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