static void MefTest(string pa)
{
pa += "..\\";
var a = new MyClass();
if (Find(pa, a))
{
foreach (var item in a.Cals)
{
var temp = item.GetOperations();
}
}
var b = new MyCal();
FindExt <MyCal, ICalShow>(pa, b);
var s = b.Show?.Show(5);
var c = new MCal2();
if (Find(pa, c))
{
var res3 = c.MDefinC.GetStr();
var res4 = c.Subtract[0].Value(0.3, 0.4);
var resi3 = c.Add[0](90, 90);
var s1 = "1";
var s2 = "2";
c.RefeObj(s1, s2);
}
}
/// <summary>
/// 基于约定的部件注册
/// </summary>
/// <param name="path"></param>
/// <param name="obj"></param>
/// <returns></returns>
public static bool FindEx(string path, MyCal obj)
{
var res = false;
var rb = new RegistrationBuilder(); //用于定义出口和入口的约定
rb.ForTypesDerivedFrom <ICalShow>().Export <ICalShow>(); //指定出口约定 给所有实现接口的类型应用[Export(Type)]特性
rb.ForType <MyCal>().ImportProperty <ICalShow>(t => t.Show); //指定入口约定 将入口映射到指定的属性上
var dc = new DirectoryCatalog(path, rb);
CompositionService sv = dc.CreateCompositionService();
try
{
sv.SatisfyImportsOnce(obj, rb); //在目录中搜索部件 多个出口匹配项出异常
res = true;
}
catch (ChangeRejectedException ex)
{
Console.WriteLine(ex.Message);
}
catch (CompositionException ex)
{
Console.WriteLine(ex.Message);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
sv.Dispose();
return(res);
}