This post is mainly a reply on this StackOverflow Question: how to change listbox item’s color individually programmatically in silverlight?
We want to modify the Listbox item template so we get the following layout:
The implementation is fairly simple. We use a converter on our Listbox Item binding and return a Style Property.
The Message Model implementation:
public class Message
{
public string Name { get; set; }
public bool IsInError { get { return String.IsNullOrEmpty(ErrorMessage); } }
public string ErrorMessage { get; set; }
}
In the listbox, we will bind these message properties for each item. We can have a different style based on these properties by using the listbox ItemTemplate.
The Listbox Item Template implementation:
For each listbox item, we will assign a style for our TextBlock element.
The Converter implementation:
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if ((bool)value)
{
return Application.Current.Resources["ListBoxTextNormalItem"];
}
return Application.Current.Resources["ListBoxTextErrorItem"];
}
The Style implementation:
You can download the sample source here: ListBoxItemColorSample
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