Problem

The top package of an Enterprise Architect Project EAP should be retrieved

Approach

Navigate to the Parent ID until the package return null.

Solution – Lösung

public EA.Package getTopPackage(EA.Package selectedPackage)
{
    EA.Package package = null;
    try
    {
        // If it has a parent it won't throw an error
        package = repository.GetPackageByID(selectedPackage.ParentID);
    }
    catch (System.Runtime.InteropServices.COMException)
    {
        // The selectedPackage is the top package
        package = selectedPackage;
    }
    // If this is not the top package, recall this function
    if (package != selectedPackage)
    {
        package = getTopPackage(package);
    }
    return package;
}