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plurals

POUsing ListPicker and DataBinding
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9745279
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2012-03-16T22:26:54.340
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2012-03-16T22:50:48.367
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2012-03-16T22:50:48.367
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Body
Ok. I give up. I want to use ListPicker control in one of my Windows Phone apps. I am getting an Exception SelectedItem must always be set to a valid value. This is my XAML piece of ListPicker: <pre><code><toolkit:ListPicker x:Name="CategoryPicker" FullModeItemTemplate="{StaticResource CategoryPickerFullModeItemTemplate}" Margin="12,0,0,0" ItemsSource="{Binding CategoryList}" SelectedItem="{Binding SelectedCategory, Mode=TwoWay}" ExpansionMode="ExpansionAllowed" FullModeHeader="Pick Categories" CacheMode="BitmapCache" Width="420" HorizontalAlignment="Left" /> </code></pre> <code>CategoryList</code> is an <code>ObservableCollection<Category></code> in my ViewModel. <code>SelectedCategory</code> is a property in my ViewModel of type Category. This is how I am declaring both CategoryList and SelectedCategory: <pre><code>private Category _selectedCategory;// = new Category(); private ObservableCollection<Category> _categoryList = new ObservableCollection<Category>(); public ObservableCollection<Category> CategoryList { get { return _categoryList; } set { _categoryList = value; RaisePropertyChanged("CategoryList"); } } public Category SelectedCategory { get { return _selectedCategory; } set { if (_selectedCategory == value) { return; } _selectedCategory = value; RaisePropertyChanged("SelectedCategory"); } } </code></pre> Appreciate your help!!! Maybe I have not understood the usage of ListPicker very well.
Tags
<windows-phone-7><mvvm-light><listpicker>
Title
Using ListPicker and DataBinding
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USRajeev Nair
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1. USRajeev Nair
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1. PL
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1. This table or related slice is empty.
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1. PO
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1. VO
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 POUsing ListPicker and DataBinding
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 This table or related slice is empty.
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 VTUpMod
2. VO
 singulars
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 POUsing ListPicker and DataBinding
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 This table or related slice is empty.
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CommentsPostId
1. COHi there @RajeevNair, could you share your answer? I also have a problem just like you http://stackoverflow.com/questions/15058162/listbox-navigation-page-mvvm-light-in-windows-phone
 singulars
 PostPostId
 POUsing ListPicker and DataBinding
 UserUserId
 USyudayyy

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.