I'm not getting control under hub section

Question

Hi,

How to get controls of combobox item whether checked or not in C#.
here is an XAML code for which i have created for combobox.

<Hub>
            <HubSection>
                <DataTemplate>
                    <StackPanel>
                        <ComboBox x:Name="myComboBox">
                            <ComboBoxItem Content="Male"/>
                            <ComboBoxItem Content="Female"/>
                            <ComboBoxItem Content="other"/>
                        </ComboBox>
                        <Button x:Name="nextButton" Content="Next"/>
                    </StackPanel>
                </DataTemplate>
            </HubSection>
        </Hub>

and code behind it

private void nextButton_Click(object sender, RoutedEventArgs e)
        {
            if(myComboBox.isSelected = male)		
		{			
		\\TODOD
        	}
	    else if(myComboBox.isSelected = female)		
		{			
		\\TODOD
        	}
	    else if(myComboBox.isSelected = other)		
		{			
		\\TODOD
        	}

But Im Getting error. Please help me

Answer 1

Hi Ashiq,

you cannot access elements via x:Name in the codebehind-file if they are part of a DataTemplate.

What you can do:

Option 1 => Create a UserControl containing your ComboBox and Button and do all the logic in that UserControl. There you don't have a DataTemplate. After you've finished your UserControl, you can use it in a HubSection.

Option 2 => Create a Loaded-EventHandler for the ComboBox and store the ComboBox in a field of your page:

<ComboBox x:Name="myComboBox" Loaded="myComboBox_Loaded">

ComboBox myComboBox;
        private void myComboBox_Loaded(object sender, RoutedEventArgs e)
        {
            myComboBox = (ComboBox)sender;
        }

Option 3 => Add an EventHandler for the SelectionChanged-Event of the ComboBox. Store the selected item in a field and access it in your next button click handler.

Option 4 => Use MVVM and set a DataContext for your HubSection. Then you can do everything via data binding.

Here a thread with a similar issue and its solution:

http://social.msdn.microsoft.com/Forums/en-US/a963577d-c567-45c3-b684-7325cc2c8c69/access-frame-control-contained-within-datatemplate-of-hubsection?forum=w81prevwCsharp

---

Thomas Claudius Huber

"If you can't make your app run faster, make it at least look & feel extremly fast"

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twitter: @thomasclaudiush
homepage: www.thomasclaudiushuber.com
author of: ultimate Windows Store Apps handbook | ultimate WPF handbook | ultimate Silverlight handbook

Answer 2

Thanks a lot