IsSelected property of ComboBoxItem not saving

Question

When I make a ComboBox with a ComboBoxItem beneath it (indented) in the Objects and Timeline panel, the IsSelected property is somehow erased when I save.

I can select the ComboBox, then select the ComboBoxItem, then check IsSelected in the Common Properties - but this setting simply will not persist after I have Published to SharePoint.

Why is this happening and how can I make the IsSelected property persist?

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"We're all in it together, kid." - Harry Tuttle, Heating Engineer

Answer 1

Could you post the xaml that is generated? I tried this and it seems to work correctly for me. 

You might also try "SelectedIndex" on the ComboBox, I think that is the proper way to set the selected item.

Answer 2

<StackPanel Orientation="Horizontal">
					<TextBlock Style="{StaticResource BasicTextBlock-Sketch}" TextWrapping="Wrap" Text="State:" Margin="60,0,0,0"/>
					<ComboBox Style="{StaticResource ComboBox-Sketch}" Margin="5,0,15,0">
						<ComboBoxItem Content="Please select" Style="{StaticResource ComboBoxItem-Sketch}" IsSelected="True"/>
					</ComboBox>
				</StackPanel>

Looks fine in XAML - just not displaying properly in the UI. All I see is the ComboBox down arrow.

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"We're all in it together, kid." - Harry Tuttle, Heating Engineer

Answer 3

After looking at the msdn docs, I don't think setting IsSelected does what you want. Reading the value can tell you if it is selected, but I think the proper way to do this is to set SelectedIndex on the ComboBox.

http://msdn.microsoft.com/en-us/library/system.windows.controls.listboxitem.isselected(v=vs.95).aspx

http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.selector.selectedindex(v=vs.95).aspx

In your case, the xaml would look like this:

<StackPanel Orientation="Horizontal">
					<TextBlock Style="{StaticResource BasicTextBlock-Sketch}" TextWrapping="Wrap" Text="State:" Margin="60,0,0,0"/>
					<ComboBox Style="{StaticResource ComboBox-Sketch}" Margin="5,0,15,0" SelectedIndex="0">
						<ComboBoxItem Content="Please select" Style="{StaticResource ComboBoxItem-Sketch}"/>
					</ComboBox>
				</StackPanel>

Answer 4

Thanks. Makes more sense than what I was trying to do. :)

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"We're all in it together, kid." - Harry Tuttle, Heating Engineer