RadAutoCompleBox Value is not present in Itemsource

[ali]

Hello,

I have a question regarding autocompletebox component. I would like to display an icon right at the cell textbox in GridView if the entered value is not present in the itemsource. Can one solve this over binding? Which is the best way to do that?

                    <telerik:GridViewDataColumn.CellEditTemplate>
                        <DataTemplate >
                            <telerik:RadAutoCompleteBox DisplayMemberPath="Name"
                                                        TextSearchMode="Contains"
                                                        SearchText="{Binding Path=Name, Mode=TwoWay}"
                                                        AutoCompleteMode="Suggest"
                                                        SelectionMode="Single"        
                                                        VerticalAlignment="Center"
                                                        BoxesItemStyle="{StaticResource RadAutoCompleteBoxStyle}"
NoResultsContentTemplate="{StaticResource
RadAutoCompleteBoxNoResultsContentTemplate}"
                                                        NoResultsContent="{x:Static resources:Translations.lbl_NoMatches}"
ItemsSource="{Binding Path=DataContext.Project.Names,
RelativeSource={RelativeSource AncestorType=telerik:RadGridView}}">

                                <i:Interaction.Triggers>
                                    <i:EventTrigger EventName="LostFocus">
<i:InvokeCommandAction 
Command="{Binding RelativeSource={RelativeSource FindAncestor,
AncestorType=UserControl},
Path=DataContext.NewNameEnteredCommand}"
                                                                CommandParameter="{Binding Path=.}"/>
                                    </i:EventTrigger>
                                </i:Interaction.Triggers>
                            </telerik:RadAutoCompleteBox>
                        </DataTemplate>

                    </telerik:GridViewDataColumn.CellEditTemplate>

[Dinko | Tech Support Engineer]

Hi ali,

Thank you for the provided code snippet.

You could achieve this behavior by implementing custom filtering behavior and create a bool property. Then you can bind this property to a visibility of the icon on the right side of the cell. Setting this property to Visible or Collapse will depends on the result returned inside the overridden FindMatchingItems method. I have prepared a sample project which demonstrates this. I need to point that this is a custom solution and may not work in all cases. But I think this will be a good starting point for achieving your final behavior.

Regards,
Dinko
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