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How do I databind to children of a child object?

Answer 1

A:

When binding against an XML data source, you should use XPath instead of Path to reach the desired element/attribute.

EDIT: You need to somehow set your object to be the datacontext of the control (or one of its ancestors) and then you can reference any property or nested property of it. For example in your case:

...{Binding Path=DoctorOfficesCollection[0].GroupIdSource.GroupName}...

Aviad P. 2010-01-04 21:29:39

the actual element is not xml. I converted the structure of my object to xml just to help with understanding the layout of my object.

ecathell 2010-01-04 21:35:30

Edited answer..

Aviad P. 2010-01-04 22:29:29

ok well i have the itemsource of the Listbox set to {binding path=selecteddoctor.officecollection}is there someway I have to manipulate the individual listitems to know which instance of the collection object to get? I thought My NPI example was similar, but I remember that that table is actually a 1:1 relationship not a 1:many...

ecathell 2010-01-05 01:19:58

Answer 2

A:

I finally got this to behave after much reading. But in reality symantically nothing has changed in my code unless I am missing something in regards to how wpf controls work. I may slowly unwind these changes since its on a test view anyway and see if I can replicate the problem. Below is the working code for anyone who may be having a similar problem and needs to know how to do this.

<GroupBox 
        x:Name="DoctorOffices" 
        Header="Doctor Offices" 
        DataContext="{Binding Path=SelectedDoctor.DoctorOfficesCollection}"
        Grid.Column="1" 
        Grid.Row="0">
        <ListBox x:Name="DoctorOfficesListBox"  Background="Green"
             ItemsSource="{Binding}"
                 IsSynchronizedWithCurrentItem="true">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Border BorderThickness="2" BorderBrush="Black" CornerRadius="5" Margin="1" >
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition MinHeight="10" />
                                <RowDefinition MinHeight="35" />
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition />
                                <ColumnDefinition />
                            </Grid.ColumnDefinitions>
                            <TextBlock Grid.Row="0" Grid.Column="0" Background="red" >
                            <Label Content="Physician Number: "/>
                            <Label Content="{Binding Path=ForeignId, StringFormat='Physician Number: {0}'}"
                                    FontSize="12" FontWeight="Bold" />
                            </TextBlock>
                            <TextBlock Background="white" Grid.Row="0" Grid.Column="1"
                                       Text="{Binding Path=GroupIdSource.GroupName}" />
                            <StackPanel  Orientation="Horizontal" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" Background="green">
                                <StackPanel Orientation="Vertical" >
                                    <TextBlock Margin="5,0,0,0" Text="{Binding Path=Address1, Converter={StaticResource trimmingConverter}}"/>
                                    <TextBlock Margin="5,0,0,0" Text="{Binding Path=Address2, Converter={StaticResource trimmingConverter}}"/>
                                    <TextBlock Margin="5,0,0,0" Text="{Binding Path=Address3, Converter={StaticResource trimmingConverter}}"/>
                                    <TextBlock Margin="5,0,0,0">
                            <TextBlock.Text>
                                <MultiBinding  StringFormat="{}{0}, {1}  {2}">
                                    <Binding Path="City"/>
                                    <Binding Path="State"/>
                                    <Binding Path="Zip"/>
                                </MultiBinding>
                            </TextBlock.Text>
                                    </TextBlock>
                                </StackPanel>
                                <StackPanel Orientation="Vertical" Margin="5,0,0,0" FlowDirection="RightToLeft">
                                    <TextBlock Text="{Binding Path=PrimaryPhone, StringFormat='Primary Phone: {0}'}"/>
                                    <TextBlock Text="{Binding Path=Fax, StringFormat='Fax: {0}'}" />
                                    <TextBlock Text="{Binding Path=AlternatePhone1, StringFormat='Alternate Phone 1: {0}'}" 
                                       Visibility="{Binding Path=AlternatePhone1, Converter={StaticResource TextToVisibilityConverter}}" />
                                    <TextBlock Text="{Binding Path=AlternatePhone2, StringFormat='Alternate Phone 2: {0}'}"
                                        Visibility="{Binding Path=AlternatePhone2, Converter={StaticResource TextToVisibilityConverter}}" />
                                </StackPanel>
                            </StackPanel>
                        </Grid>
                    </Border>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </GroupBox>

as you can see really the only things I have done differnt is add a group box set to the original Databinding of the listbox by itself and then change itemsource to {bindings}. None of the other changes should have any real effect.

ecathell 2010-01-05 18:21:34

Maybe the issynchronizedwithcurrentitem is the ticket. I dont think i had it at this level on my other view. But i will verify that.

ecathell 2010-01-05 18:26:19

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How do I databind to children of a child object?

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