Example: Customising a plugin

The IPriceCalculator plugin implementation is usually customised to get the price from an ERP system. In this example, the price is simply preset to be just 7, with a 25% VAT.

To customise a plugin, the first step is to identify the concrete implementation class. The naming convention in Litium is that the concrete implementation has the same name as the interface, but without the preceding "I".

So, the IPriceCalculator default implementation will have the concrete implementation PriceCalculator.

To override the concrete implementation:

1. Create a new Visual Studio class library project. In this example we call it Litium.Studio.KC.Samples.ERPPricing.
2. Make sure that the class library project .NET Framework version is 4.5.2.
3. Write a class that extends the default concrete implementation, in this example we call it ERPPriceCalculator.
4. Put the compiled dll output from this project into the webroot\bin directory. Litium automatically detects and uses this implementation.

This is how Visual Studio will look like for the above project: