wpf-119833-controls-and-libraries-scheduler-data-binding-mapping-converters.md
Mapping converters allow you to apply custom logic to mapping.
Converters can change data from one type to another, translate data based on additional information, or change the format in which the data is stored. To associate a value converter with a mapping, create a class that implements the IValueConverter interface and its Convert and ConvertBack methods and specify it in XAML using the Mapping.Converter property.
The data is propagated back and forth between the property, default mapping method and a data source field. You can insert a converter between the property and the default mapping method, or between default mapping method and the data source field, or instead of a default mapping method. Converter position in that propagation chain is defined by the MappingConversionBehavior enumeration.
The following image illustrates the converter’s processing order:
The following example implements a mapping converter that returns label colors based on enumeration values:
View Example: Implement a Custom Mapping Converter for Color Values
Implement a class with a IValueConverter interface (inherited from the MarkupExtension class).
Assign the converter to the label color mapping’s Mapping.Converter property: