#WPF COLORCONVERTER XAML HOW TO#

XAML enables a workflow where separate parties can work on the UI and the logic of an app, using potentially different tools. This is unlike most other markup languages, which are typically an interpreted language without such a direct tie to a backing type system. XAML directly represents the instantiation of objects in a specific set of backing types defined in assemblies. You can create visible UI elements in the declarative XAML markup, and then separate the UI definition from the run-time logic by using code-behind files that are joined to the markup through partial class definitions. NET Core programming model, XAML simplifies creating a UI for a. Return Color.FromArgb(systemColor.A, systemColor.R, systemColor.G, systemColor.The Desktop Guide documentation for. Public static Color ColorFromName(string colorName) If (double.TryParse(parameters, NumberStyles.AllowDecimalPoint,, out dblTemp))Ĭolor = new SolidColorBrush(colorIfTrue) Ĭolor = new SolidColorBrush(colorIfFalse) If (count > 2 & !string.IsNullOrEmpty(parameters)) If (count > 1 & !string.IsNullOrEmpty(parameters))ĬolorIfFalse = ColorFromName(parameters) If (count > 0 & !string.IsNullOrEmpty(parameters))ĬolorIfTrue = ColorFromName(parameters) Var parameters = parameterstring.Split(' ') If (!string.IsNullOrEmpty(parameterstring)) Var parameterstring = parameter.ToString() / A SolidColorBrush in the supplied or default colors depending on the state of value. / A CSV string on the format may be provided for customization, default is.

/ Bolean value controlling wether to apply color change #region Implementation of IValueConverter using System Ĭlass BoolToColorBrushConverter : IValueConverter In my case I want the output to be 'Transparent' when value is false. I specify 'LimeGreen' as a fallback color if the interpertation of ConverterParameter fails. Therfore I made a helper method called ColorFromName(string name). This type does not have a Color.FromName() method, like the class. Since the SolidColorBrush() method mentioned by is part of the library, it uses the Color type from that same library. I here provide the Converter I taking the parameter. To make this converter general you may use a ConverterParameter for specifying the colors which is to be inserted when value is true or false. This is demonstrated in the second TextBlock which uses a property Trigger to check its own IsEnabled property against the value of true (since its IsEnabled property will be the same as its parent's). That is, if you set IsEnabled to false on your Button, then your TextBlock will have its IsEnabled property updated to false automatically. However, this is overkill - the IsEnabled property is propagated down to children automatically by WPF. In the example above, the first TextBlock binds to its parent's IsEnabled property using a DataTrigger, and sets the Foreground to some colour if it is true. However, do you really need to use a converter? This can be done in XAML only using Triggers:

#WPF COLORCONVERTER XAML HOW TO#

The answer above shows you how to correctly you use a converter.

Public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)īutton's enable,isable property changes from viewmodel(e.g using RaiseCanExecuteChanged)()) Public object Convert(object value, Type targetType, object parameter, CultureInfo culture) public class BrushColorConverter : IValueConverter I have declared following class in my 'Models' folder. I want to set foreground of my textblock to black color when its associated button's isEnabled is true. I am working on WPF application.I have bound my textblock to my button.

Wpf colorconverter xaml