Pobieranie wartosci komorki z ListView

 
        <ListView x:Name="ordersList" Margin="0,100,0,0" BorderThickness="2" ItemsSource="{Binding Orders}">
            <ListView.View>
                <GridView AllowsColumnReorder="False" x:Name="_dataGrid">
                    <GridViewColumn Header="ID" Width="100" DisplayMemberBinding="{Binding orderId}"/>
                    <GridViewColumn Header="ext" Width="50" DisplayMemberBinding="{Binding xOrderId}" />
                    <GridViewColumn Header="Status" Width="70" DisplayMemberBinding="{Binding status}" />
                    <GridViewColumn Header="Queue" Width="100" DisplayMemberBinding="{Binding queue}" />
                    <GridViewColumn Header="Notes" Width="600"  >
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBox Text="{Binding notes}" Foreground="Blue" Width="570" />
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                    <GridViewColumn x:Name="_partsNeeded" Header="Parts Needed" Width="600" >
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBox Text="{Binding partsNeeded}" Width="570" LostFocus="TextBox_LostFocus" AcceptsReturn="True"/>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>

Order o = listview.Item[1] as Order;

public SelectedOrder {get;set;}

<ListView SelectedItem="{Binding SelectedOrder}" ...

Order selectedOrder = listview.SelectedItem as Order

 
                            <DataTemplate>
                                <TextBox Text="{Binding partsNeeded}" Width="570" LostFocus="TextBox_LostFocus" AcceptsReturn="True"/>
                            </DataTemplate>