Where do I place busyindicator to wrap the whole page, so no control is enabled until activity is completed - silverlight-4.0

Question

I am creating an app in Silverlight 4 with MVVM Light.
At present I have a page with many controls ie. StackPanels, Listbox, TexBlocks and Buttons. I have a busyindicator on the page that is bound to a viewmodel. When a button is clicked to say retrieve data from the database the busyindicator displays and vanishes when the call is completed.
This all works as it should.
What I want to happen is that the whole page is wrapped in the busyindicator so that the page dims and nothing works until the event is completed. I have read that you just wrap the control inside the Busyindicator.
No matter where I place the opening of the indicator I get blue lines showing 'The property Content is set more than once.'
I have posted the code below, could anyone explain where to put the indicator code.
<Grid.RowDefinitions>
<RowDefinition Height ="0" />
<RowDefinition Height ="30" />
<RowDefinition Height ="60" />
<RowDefinition Height ="Auto" />
<RowDefinition Height ="40" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="1" Grid.Column="0" Text="Header" Width="353" Margin="0 0 0 0" Height="30" />
<StackPanel Grid.Row="2" VerticalAlignment="Center" Orientation="Horizontal" >
<Button Grid.Row="2" Grid.Column="0" Content="GetData" Height="35" Width="130" HorizontalAlignment="Left" Margin="0,0,0,0" Command="{Binding GetData}"></Button>
<!-- <toolkit:BusyIndicator Width="150" Height="50" IsBusy="{Binding IsBusy}" BusyContent="Searching ..." /> -->
</StackPanel>
<ListBox x:Name="MyListBox" Grid.Row="3">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="400"></ColumnDefinition>
<ColumnDefinition Width="70"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="70"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" Text="{Binding Name}"></TextBlock>
<Button Grid.Row="0" Grid.RowSpan="2" Grid.Column="3" Content="Delete" VerticalAlignment="Center"
Command="{Binding Delete}"></Button>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<TextBlock Grid.Row="4" Margin="5,10,0,0" Text="{BindingMessage}"></TextBlock>
</Grid>

Answer 1

You need to put all the content inside the user control as shown below:
<toolkit:BusyIndicator Width="150" Height="50" IsBusy="{Binding IsBusy}" BusyContent="Searching ...">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height ="0" />
<RowDefinition Height ="30" />
<RowDefinition Height ="60" />
<RowDefinition Height ="Auto" />
<RowDefinition Height ="40" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="1" Grid.Column="0" Text="Header" Width="353" Margin="0 0 0 0" Height="30" />
<StackPanel Grid.Row="2" VerticalAlignment="Center" Orientation="Horizontal" >
<Button Grid.Row="2" Grid.Column="0" Content="GetData" Height="35" Width="130" HorizontalAlignment="Left" Margin="0,0,0,0" Command="{Binding GetData}"></Button>
</StackPanel>
<ListBox x:Name="MyListBox" Grid.Row="3">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="400"></ColumnDefinition>
<ColumnDefinition Width="70"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="70"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" Text="{Binding Name}"></TextBlock>
<Button Grid.Row="0" Grid.RowSpan="2" Grid.Column="3" Content="Delete" VerticalAlignment="Center" Command="{Binding Delete}"></Button>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<TextBlock Grid.Row="4" Margin="5,10,0,0" Text="{BindingMessage}"></TextBlock>
</Grid>
</toolkit:BusyIndicator>