public List <float> PeformCalculations(CompositionContainer container, CalculationSelection currentCalculation)
{
//Compose the parts, match the imports with exports
container.ComposeParts(currentCalculation);
List <float> returnVariables = new List <float>();
//loop through all available calculations inside the assembly
foreach (var item in currentCalculation.AllCalculations)
{
//retrieve the list of applicable countries from the metadata
string[] applicableCountries = item.Metadata.Countries;
//Check whether the current tax calculation is applicable in the selected country
bool cmp = applicableCountries.Contains(currentCalculation.Country.Stringify());
float returnVariable = 0;
if (cmp)
{
//get the the value for lazy initialization
ICalculation calc = item.Value as ICalculation;
//provide the input salary
calc.Price = currentCalculation.Price;
//perform the calculation
returnVariable = calc.Calculate(currentCalculation.Country.Tax);
returnVariables.Add(returnVariable);
}
}
return(returnVariables);
}
public List <float> DoCalculations(int price, string countryName, int countryTax)
{
//Loading the assembly
var dllFile = new FileInfo(@"C:\Users\Katarina\Documents\Visual Studio 2015\Projects\TestProject.Web\TestProject.MEF\Extensions\TestProject.MEF.dll");
var asm = Assembly.LoadFrom(dllFile.FullName);
//Create the catalog
var catalog = new AssemblyCatalog(asm);
//Create the composition container
CompositionContainer container = new CompositionContainer(catalog);
//Create an instance of CalculationSelection class
CountryTaxInformation country = new CountryTaxInformation();
country.Name = countryName;
country.Tax = countryTax;
CalculationSelection myCalculations = new CalculationSelection(price, country);
//Perform all the tax calculations
List <float> returnVariables = new List <float>();
returnVariables = PeformCalculations(container, myCalculations);
return(returnVariables);
}