ListView Problem

In my double-click function, How to i access my grid (Name="Level2" @ line 17) so that I can set it visibility to visible for the selected row?

If there are any possible way to implement the change of visibility on double-clicking the selected row in WPF is also very welcome...

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<StackPanel Margin="8">  

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        <ListView Name="listView" ItemsSource="{Binding}" MouseDoubleClick="listView_MouseDoubleClick">  

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            <ListView.ItemTemplate> 

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                <DataTemplate > 

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                    <Grid Name="GridMain" > 

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                        <Grid.RowDefinitions> 

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                            <RowDefinition>RowDefinition>  

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                            <RowDefinition>RowDefinition>  

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                        Grid.RowDefinitions> 

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                        <Grid Name="Level1" Grid.Row="0" Height="20" > 

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                            <TextBlock Text="{Binding col0}" Name="AA" /> 

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                        Grid> 

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                        <Grid Name="Level2" Grid.Row="1" Visibility ="Collapsed">  

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                            <Grid.ColumnDefinitions> 

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                                <ColumnDefinition>ColumnDefinition>  

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                                <ColumnDefinition>ColumnDefinition>  

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                            Grid.ColumnDefinitions> 

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                            <TextBlock Text="{Binding col1}" Grid.Column="0" Name="BB" /> 

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                            <TextBlock Text="{Binding col2}" Grid.Column="1" Name="CC"/>  

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                        Grid> 

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                    Grid> 

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                DataTemplate> 

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            ListView.ItemTemplate> 

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        ListView> 

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    StackPanel>

1	<StackPanel Margin="8">
2
3	<ListView Name="listView" ItemsSource="{Binding}" MouseDoubleClick="listView_MouseDoubleClick">
4	<ListView.ItemTemplate>
5	<DataTemplate >
6	<Grid Name="GridMain" >
7	<Grid.RowDefinitions>
8	<RowDefinition>RowDefinition>
9	<RowDefinition>RowDefinition>
10	Grid.RowDefinitions>
11
12
13	<Grid Name="Level1" Grid.Row="0" Height="20" >
14	<TextBlock Text="{Binding col0}" Name="AA" />
15	Grid>
16
17
18	<Grid Name="Level2" Grid.Row="1" Visibility ="Collapsed">
19	<Grid.ColumnDefinitions>
20	<ColumnDefinition>ColumnDefinition>
21	<ColumnDefinition>ColumnDefinition>
22	Grid.ColumnDefinitions>
23
24	<TextBlock Text="{Binding col1}" Grid.Column="0" Name="BB" />
25	<TextBlock Text="{Binding col2}" Grid.Column="1" Name="CC"/>
26	Grid>
27
28	Grid>
29
30	DataTemplate>
31	ListView.ItemTemplate>
32	ListView>
33
34	StackPanel>