![]() You can download the full source for this blog post: UniversalValueConverter. I am guessing that type conversion within Silverlight is 'baked-in' to the XAML parser, which means that it is not possible to re-use this logic :-( Binding color to bool using converter does not get updated. WPF Databinding DataTrigger to change color of shape based on boolean value. Style object based on binding bool attribute in wpf. Unfortunately Silverlight lacks the TypeDescriptor class which is used to obtain TypeConveters. Boolean to Color converter in wpf application. FillProperty, new SolidColorBrush ( Colors. Which provides a more flexible mechanism for setting property values: rect1. The above converter really is swiss army knife for bindings, but what about code-behind? You are still constrained by the type requirements of the property being set: rect1. In the example below, we specify each of the R, G and B values as a 2 hex-digit number (00-FF), representing the range 0-255. You can specify RGB color values in XAML in one of several ways. You can also use this converter to convert from string to their corresponding enum values, for example binding the string "Collapsed" to the Visbility property. The type converter that converters names of colors to a SolidColorBrush of the specified color will also create a brush of a specified RGB color. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. For example, you can set the fill of a rectangle by simply specifying the named color: įor the first conversion, string to brush, you can use named colors, and the hex notation in its range of abbreviated forms (#AF7, #AAFF77, #FFAAFF77. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. One of the great features of the XAML language is that it is flexible, concise and expressive (yes, I know that XML can be a little verbose, but if you try to create a complex UI purely in code-behind I think you will agree with my observations!). This converter can be used both within bindings and in code-behind to give more concise property setters. Your converter does not check for this case but instead just converts whatever is passed to string.This post provides a simple IValueConverter implementation that makes use of the framework type converters in order to convert between a large range of source / target types. I can display the Hex value from this variable using ToString() however that also gives me the alpha value. ![]() For example, if binding fails, WPF will pass DependencyProperty.UnsetValue to your converter. I can display the Hex value from this variable using ToString() however that also gives me the alpha value. Viewed 4k times 2 I have created a variable using . new SolidColorBrush (Color.FromArgb (0x44, 0xFF, 0xFF, 0)) ( Documentation) Note: Dont use Color.FromRgb () (without the A) if your code will be shared in both Silverlight and WPF, as the FromRgb method doesnt exist in Silverlight. You need to add more checks to your MaddoColorConverter. Ask Question Asked 12 years, 5 months ago. Public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)Īnd here are some relevant snippets from the form xaml: Var convertedColor = ColorConverter.ConvertFromString(c) In cases where the color value is bound to another property, one would typically calculate the darker shade as a mathematical percentage of the base color. For example, we may want a button border to be a darker shade of the button background. If (value != null & !string.IsNullOrWhiteSpace(value.ToString())) WPF sometimes requires us to convert one shade of a color to another. Public object Convert(object value, Type targetType, object parameter, CultureInfo culture) Here's the converter code: public class MaddoColorConverter : IValueConverter I made the converter for the ColorPicker from extended WPF toolkit. I made a converter from string to color and back and it works fine when run but on the editor it just throws a "Token is not valid." error and prevents the editor from showing up, really annoying because it prevents me from using the visual editor.
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