- #PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE HOW TO#
- #PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE CODE#
- #PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE WINDOWS#
It is very common to share data converters among multiple data bindings on the page: It is then referenced with a StaticResource markup extension to set the Converter property in two data bindings. The IntToBoolConverter is instantiated in the page's resource dictionary.
#PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE HOW TO#
The Enable Buttons page in the Data Binding Demos sample demonstrates how to use this value converter in a data binding. If the data binding also includes a StringFormat setting, the value converter is invoked before the result is formatted as a string. ConvertBack performs the opposite conversion: It assumes the value parameter is a bool from the target, and converts it to an int return value for the source. The ConvertBack method is called when data moves from the target to the source in TwoWay or OneWayToSource bindings. The method shown here casts the value parameter to an int and then compares it with 0 for a bool return value.
The method must return a value of the type of the data-binding target. The value parameter is the object or value from the data-binding source. The Convert method is called when data moves from the source to the target in OneWay or TwoWay bindings. This class becomes part of the data binding. You set an instance of this class to the Converter property of the Binding class or to the Converter property of the Binding markup extension. Public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) Public object Convert(object value, Type targetType, object parameter, CultureInfo culture) You can do this with a class that implements the IValueConverter interface: public class IntToBoolConverter : IValueConverter You want this data binding to produce a false value when the integer source is equal to 0, and true otherwise. Suppose you want to define a data binding where the source property is of type int but the target property is a bool.
#PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE WINDOWS#
(The Universal Windows Platform contains a similar class named IValueConverter in the Windows.UI.Xaml.Data namespace, but this IValueConverter is in the Xamarin.Forms namespace.) Classes that implement IValueConverter are called value converters, but they are also often referred to as binding converters or binding value converters.
#PRISM VIDEO FORMAT CONVERTER HOW TO CHANGE LANGUAGE CODE#
For other types of conversions, you need to write some specialized code in a class that implements the IValueConverter interface. In the String Formatting article, you saw how you can use the StringFormat property of a data binding to convert any type into a string. When that is not the case, a type conversion must take place. This transfer is straightforward when the source and target properties are of the same type, or when one type can be converted to the other type through an implicit conversion.
Data bindings usually transfer data from a source property to a target property, and in some cases from the target property to the source property.
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