Vista - Binding Problem in ComboBox

Hi

I try to bound the ComboBox (x:Name="Search_fld_FieldName") to the Property
"Name" of my "SelectableFields" Object (see <DataTemplate
x:Key="FieldItemsTemplate">).

The "Value" will be shown in the TextBox.
But the "Name" of my SearchField-Elements ist not show in the ComboBox:
<VitoSearchBox:SearchField Name="Name" Default="True" Value="Morbus"/>

The Elements in the "SelectableFields" Colletion are visible if DropDownOpend.
In Expression Blend I tryed different ways to make the Name visible in the
ComboBox.
But without success.

Can you tell me what I'm doing wrong.



My XAML:

<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:col="clr-namespace:System.Collections;assembly=mscorlib"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:VitoSearchBox="clr-namespace:VitoSearchBox"
x:Class="VitoSearchBox"
x:Name="VitoSearchBox"
Width="195" Height="500" Background="#FFFFFFFF" MinWidth="200">

<UserControl.Resources>

<VitoSearchBox:SearchTables x:Key="mySearchTablesDatas">
<VitoSearchBox:SearchTable Name="Patient">
<VitoSearchBox:SearchField Name="Name" Default="True" Value="Morbus"/>
<VitoSearchBox:SearchField Name="Vorname" Default="True"
Value="Hugo" />
<VitoSearchBox:SearchField Name="Strasse"/>
<VitoSearchBox:SearchField Name="Postleitzahl"/>
<VitoSearchBox:SearchField Name="Ort"/>
</VitoSearchBox:SearchTable>
<VitoSearchBox:SearchTable Name="Lieferant">
<VitoSearchBox:SearchField Name="Sugus" Default="True"/>
<VitoSearchBox:SearchField Name="Otto" Default="True"/>
<VitoSearchBox:SearchField Name="Essig"/>
<VitoSearchBox:SearchField Name="Duhgfgug"/>
</VitoSearchBox:SearchTable>
<VitoSearchBox:SearchTable Name="Artikel">
<VitoSearchBox:SearchField Name="Name" Default="True"/>
<VitoSearchBox:SearchField Name="Nummer" Default="True"/>
<VitoSearchBox:SearchField Name="Menge" Default="True"/>
<VitoSearchBox:SearchField Name="Hersteller"/>
<VitoSearchBox:SearchField Name="Lagermenge"/>
</VitoSearchBox:SearchTable>
</VitoSearchBox:SearchTables>

<DataTemplate x:Key="FieldItemsTemplate">
<Grid HorizontalAlignment="Right" Width="Auto" Height="20">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="113"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ComboBox
SelectedValue="{Binding Path=SelectableFields, Mode=TwoWay,
UpdateSourceTrigger=PropertyChanged}"
ItemsSource="{Binding Source={StaticResource mySearchTablesDatas},
Path=SelectableFields, Mode=Default, UpdateSourceTrigger=PropertyChanged}"
DisplayMemberPath="Name"
x:Name="Search_fld_FieldName"
MinWidth="90" HorizontalContentAlignment="Stretch" Padding="0,0,0,0"
Grid.ColumnSpan="1"
Margin="-2,0,0,0"
Text="{Binding Path=[Name], Mode=OneWay}"
/>
<TextBox HorizontalAlignment="Stretch" Width="75" Grid.Column="1"
Text="{Binding Path=Value, Mode=TwoWay,
UpdateSourceTrigger=PropertyChanged}" />
</Grid>
</DataTemplate>

</UserControl.Resources>

<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="0.936*"/>
<RowDefinition Height="0.064*"/>
<RowDefinition Height="4.8"/>
<RowDefinition Height="71" MinHeight="100"/>
</Grid.RowDefinitions>

<GridSplitter HorizontalAlignment="Stretch" Grid.Row="2" Margin="0,0,0,0"/>

<ListBox x:Name="mySearchTables" VerticalAlignment="Top" Height="131"
ScrollViewer.CanContentScroll="True"
DisplayMemberPath="Name" IsSynchronizedWithCurrentItem="True"
SelectionChanged="SelectedSearchTableChanged"
ItemsSource="{Binding Source={StaticResource mySearchTablesDatas},
Mode=Default}"
/>

<ListBox Margin="0,131,0,25" x:Name="SearchCriterias"
IsSynchronizedWithCurrentItem="True"
ItemTemplate="{DynamicResource FieldItemsTemplate}"
Grid.RowSpan="2"
ItemsSource="{Binding Source={StaticResource mySearchTablesDatas},
Path=SearchFields, Mode=Default}" IsTextSearchEnabled="False"

/>

<ListView x:Name="SearchResult" Grid.Row="3"
IsSynchronizedWithCurrentItem="True">
<ListView.View>
<GridView>
<GridViewColumn Header="GridViewColumn"/>
</GridView>
</ListView.View>
</ListView>

<Button Style="{DynamicResource SimpleButton}" Height="25" Width="50"
Content="Search" BorderThickness="1,1,1,1" RenderTransformOrigin="0.44,0.477"
d:LayoutOverrides="Height" HorizontalAlignment="Right" Margin="0,0,0,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnSearch"
Click="Search"/>
<Button Style="{DynamicResource SimpleButton}" Height="25" Width="25"
Content="/\" BorderThickness="1,1,1,1" RenderTransformOrigin="0.483,0.462"
d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="0,0,0,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnUp"/>
<Button Style="{DynamicResource SimpleButton}" Height="25" Width="25"
Content="\/" BorderThickness="1,1,1,1" RenderTransformOrigin="0.483,0.462"
d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="25,0,0,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnDown"/>
<Button Style="{DynamicResource SimpleButton}" Height="25" Width="25"
Content="CLR" BorderThickness="1,1,1,1" RenderTransformOrigin="0.44,0.477"
d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="54,0,0,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnClear"
Click="ClearSearchFields"/>
<Button Style="{DynamicResource SimpleButton}" Height="25" Width="25"
Content="DEL" BorderThickness="1,1,1,1" RenderTransformOrigin="0.44,0.477"
d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="83,0,88,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnDelete"
Click="DeleteSearchField"/>
<Button Style="{DynamicResource SimpleButton}" Height="25" Width="25"
Content="INS" BorderThickness="1,1,1,1" RenderTransformOrigin="0.44,0.477"
d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="112,0,0,0"
VerticalAlignment="Bottom" Grid.RowSpan="2" x:Name="btnInsert"
Click="InsertSearchField"/>
</Grid>
</UserControl>