[Solved] Problem bind ComboBox in Cell Template

[Nelson]

Hi,

I want a comboBox in my GridView. I saw some example and I did that:

<telerik:RadGridView
                    Name="GrdConvocados"
                    Background="Transparent"
                    ItemsSource="{Binding OCGrupoParticipantesReuniao}"
                    BorderThickness="0"
                    HorizontalAlignment="Left" Width="Auto" MaxHeight="350" RowHeight="20" Height="300" Grid.Row="1" Grid.Column="0"
                    AutoGenerateColumns="False"
                    SelectionMode="Single"
                    IsReadOnly="True"
                    Cursor="Hand"
                    RowIndicatorVisibility="Collapsed"
                    IsFilteringAllowed="True"
                    ShowGroupPanel="False"
                    ShowColumnFooters="False" ShowInsertRow="False"
                    telerik:RadDragAndDropManager.AllowDrop="True">
                <telerik:RadGridView.Columns>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding EntidadesProp.TitulosProp.DesignacaoProp}" Header="Título" Width="0.15*"/>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding EntidadesProp.TiposentidadeProp.DesignacaoProp }" Header="Tipo Entidade" Width="0.15*"/>
                    <telerik:GridViewDataColumn DataMemberBinding="{Binding EntidadesProp.NomeTratamentoProp}" Header="Nome" Width="0.6*"/>
                <telerik:GridViewDataColumn  Header="Função" Width="0.25*">
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <Grid>
                                <Grid.RowDefinitions>
                                    <RowDefinition/>
                                </Grid.RowDefinitions>
                                <telerik:RadComboBox IsEnabled="True" ItemsSource="{Binding OCGrupoParticipantesReuniao}" DisplayMemberPath="EntidadesProp.NomeTratamentoProp"
                                    SelectedItem="{Binding Path=DataContext.ParticipanteSeleccionado.FuncoesreuniaoProp,ElementName=LayoutRoot,Mode=TwoWay}"/>
                            </Grid>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                </telerik:GridViewDataColumn>

The problem is that I can´t bind and populate the comboBox that is inside of Cell Template.
I have a different collection for ComboBox.

Any idea?

[Dimitrina]

Hi Nelson,

 When rows are created , the DataContext is dynamically set to the row item ( your business object) . This means that at a cell level your binding will not work as the context will not be your ViewModel , but the row item instead.

As a solution I may suggest to expose your view model as a static resource and then use it for the binding. This is explained in this help article. 

Let me know in case you need additional help.

Best wishes,
Didie
the Telerik team

[Nelson]

Hi Didie,

Thanks for the reply.

I did like you said, using a static view model.

<UserControl.Resources>
        <vm:GrupoConvocadosVM x:Key="ConvocadosVM"/>
</UserControl.Resources>

with this I can bind my RadComboBox, but now I have other problem! Now I can´t use this:

                 

<swi:Interaction.Triggers>
                      <swi:EventTrigger EventName="Click">
                          <esi:CallDataMethod Method="LimpaFiltros_Click" />
                      </swi:EventTrigger>
                  </swi:Interaction.Triggers>
              </telerik:RadButton>

Do  you know why?

Thanks