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• Dev C Currency Converter Exchange Rates
• Dev C++ Currency Converter

Definition

151 currencies available for card member to select in the currency converter Trip Planner Travelers can use this tool to get a pre-estimate of what things would cost while travelling. SDW provides features to access, find, compare, download and share the ECB’s published statistical information. The converter performs automatically the full process of converting the files of a C project into the equivalent C files. Classes are created, var and functions becomes attributes and methods and the changes are propagated into all files.

Exposes methods that allow the data to be modified as it passes through the binding engine.

Equivalent WinUI interface: Microsoft.UI.Xaml.Data.IValueConverter.

Derived

Windows 10 requirements

Examples

The following example shows how to implement the IValueConverter interface and use the converter when data binding to a collection of objects.

Note

If you're using C++/WinRT (or C++/CX), then see Formatting or converting data values for display for more code examples of authoring your own value converter. That topic also discusses how you could use the ConverterParameter attribute with C++ string-formatting functions.

Remarks

You can create a class that allows you to convert the format of your data between the source and the target by inheriting from IValueConverter. For example, you might want to have a list of colors that you store as RGBA values, but display them with color names in the UI. By implementing Convert and ConvertBack, you can change the format of the data values as they are passed between the target and source by the binding engine.You should always implement Convert with a functional implementation, but it's fairly common to implement ConvertBack so that it reports a not-implemented exception. You only need a ConvertBack method in your converter if you are using the converter for two-way bindings, or using XAML for serialization.

UnsetValue should be returned from an IValueConverter implementation that provides conversion in a data binding to a dependency property, in any case where the converter is unable to convert a source value. Converters shouldn't throw exceptions for that case in Convert; these will surface as run-time exceptions that you'd need to add handling for in UnhandledException or worse yet appear to users as actual run-time exceptions. Converter implementations should follow the general binding pattern that any failed binding does nothing and does not provide a value, and UnsetValue rather than null is the sentinel value for that case that the binding engine understands. For more info, see Data binding in depth.

Note

Dev C Currency Converter Exchange Rates

Dev C++ Currency Converter

To data-bind to a custom value converter that is written in Visual C++ component extensions (C++/CX), the header file in which the IValueConverter implementation class is defined must be included, directly or indirectly, in one of the code-behind files. For more info, see Create your first using C++.

Tip

Some of the default project templates for a UWP app include a helper class, BooleanToVisibilityConverter. This class is an IValueConverter implementation that handles a common custom-control scenario where you use Boolean values from your control logic class to set the Visibility value in XAML control templates.

Migration notes

In the Windows Runtime, the language parameters for IValueConverter methods use strings, as opposed to using CultureInfo objects as they do in the Windows Presentation Foundation (WPF) and Microsoft Silverlight definitions of the interface.

Methods

Applies to

See also