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POWPF Data Binding and IValueConverter
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copied!<p>Why is it that when I use a converter in my binding expression in WPF, the value is not updated when the data is updated.</p> <p>I have a simple Person data model:</p> <pre><code>class Person : INotifyPropertyChanged { public string FirstName { get; set; } public string LastName { get; set; } } </code></pre> <p>My binding expression looks like this:</p> <pre><code><TextBlock Text="{Binding Converter={StaticResource personNameConverter}" /> </code></pre> <p>My converter looks like this:</p> <pre><code>class PersonNameConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { Person p = value as Person; return p.FirstName + " " + p.LastName; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } </code></pre> <p>If I bind the data without a converter it works great:</p> <pre><code><TextBlock Text="{Binding Path=FirstName}" /> <TextBlock Text="{Binding Path=LastName}" /> </code></pre> <p>What am I missing?</p> <p>EDIT: Just to clarify a few things, both Joel and Alan are correct regarding the INotifyPropertyChanged interface that needs to be implemented. In reality I do actually implement it but it still doesn't work.</p> <p>I can't use multiple TextBlock elements because I'm trying to bind the Window Title to the full name, and the Window Title does not take a template.</p> <p>Finally, it is an option to add a compound property "FullName" and bind to it, but I'm still wondering why updating does not happen when the binding uses a converter. Even when I put a break point in the converter code, the debugger just doesn't get there when an update is done to the underlying data :-(</p> <p>Thanks, Uri</p>

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