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POINotifyPropertyChanged does not update Value Converter
 

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  1. POINotifyPropertyChanged does not update Value Converter
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    <p>I have some properties which implement the <strong>INotifyPropertyChanged</strong> interface. It works fine. But in my code I also use some value converters (if value &lt; 3 - make grid red, if value >3 and value &lt; 10 - make grid blue, etc.).</p> <p>The problem is how to refresh value converter after <strong>PropertyChanged</strong> was raised? Is there simple code behind solution? Thanks all and sorry for my bad English!</p> <p>Here some code:</p> <pre><code>public class NotifyColors : INotifyPropertyChanged { private Color _TodayColor; public Color TodayColor { get { return _TodayColor; } set { if (_TodayColor != value) { _TodayColor = value; OnPropertyChanged("TodayColor"); } } } public event PropertyChangedEventHandler PropertyChanged; private void OnPropertyChanged(String info) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(info)); // it raised correctly when I change color with color picker control } } } // here is value converter [ValueConversion(typeof(object), typeof(Brush))] public class PositionToBackgroundConverter : IValueConverter { ModulePreferences ModulePrefs; public PositionToBackgroundConverter(ModulePreferences ModulePrefs) { this.ModulePrefs = ModulePrefs; } #region IValueConverter Member public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (ModulePrefs.UseColoringByPosition) { try { if (value != null) { short value_short = (short)value; if (value_short &lt;= 3) return (Brush)new SolidColorBrush(ModulePrefs.NotifyColorsObj._TodayColor); // here is changing property else return (Brush)new SolidColorBrush(ModulePrefs.NotifyColorsObj.T100PlusColor); } else return Brushes.Transparent; } catch { return Brushes.Transparent; } } else return Brushes.Transparent; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { return null; } #endregion } </code></pre> <p>And here I apply my value converter to the grid:</p> <pre><code>// assign backgroundconverter var grid = new FrameworkElementFactory(typeof(Grid)); bin = new Binding(); bin.Path = new PropertyPath(string.Format("DataItem.{0}", LastPositionColumnName)); bin.Converter = new PositionToBackgroundConverter(ProjectViewObj.ModulePrefs); grid.SetValue(Grid.BackgroundProperty, bin); </code></pre>
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    1. USstakx
    1. USDmitriy
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    1. COIt might be helpful to post some code, showing your value converter, showing the XAML binding, and the code where you raise the property.
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      1. POINotifyPropertyChanged does not update Value Converter
      1. USmfanto
    2. COProperty change event is raised correctly (I can see it with breakpoint).
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      1. POINotifyPropertyChanged does not update Value Converter
      1. USDmitriy
    3. COI would bet folding money that there are binding errors showing up in the Output window when you run this program in the debugger. If you look at those errors and read them carefully, they will tell you what the binding is trying to do, which almost certainly is not the same as what you think it's doing.
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      1. POINotifyPropertyChanged does not update Value Converter
      1. USRobert Rossney
 

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