How to add style to a ListViewItem through code?

Question

ListViewItem newItem = new ListViewItem();

After creating an instance of ListViewItem, how do I add to the Style component?

I have my own local resource and I want to assign it to the "newItem". I assume it would be along the lines of 

newItem.Style = // something here

What needs to be added on the RHS to do so?

Answer 1

Grab the resources property of where the style is defined. For instance if it's defined in app.xaml it would be:

newItem.Style = App.Resources["localResourceKey"] as Style;

However I would recommend against using ListViewItem and the ListView.Items property, and instead work with data collections on the ListView.ItemsSource property, and define an ItemTemplate on your listview. It's a much cleaner approach when dealing with dynamic data.

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/Morten
twitter: http://www.twitter.com/dotMorten
blog: http://www.sharpgis.net

Answer 2

Thanks very much.

How would I go about implementing the method you suggested?

Answer 3

Something along the lines of this:

 

<ListView x:Name="myListView">
   <ListView.ItemTemplate>
       <DataTemplate>
             <TextBlock Text="{Binding}" /> <!--put whatever content you need here for each item -->
       </DataTemplate>
   </ListView.ItemTemplate>
</ListView>

and in code you define an observable collection of your data. Example of a simple data model that just contains strings:
var data = new ObservableCollection<string>();
data.Add("First item");
data.Add("Second item");
data.Add("Third item");
myListView.ItemsSource = data;

then if you need to add or remove an item, you just call add or remove on 'data'. No reason to mess with ListViewItem, Styles etc at all. You code-behind should just deal with the data, and you xaml view with how that data should be rendered. Basically try and avoid putting UI in your code.

---

/Morten
twitter: http://www.twitter.com/dotMorten
blog: http://www.sharpgis.net