如何创建一个继承自generic的类型的实例,并将其静态转换为基类
foreach(Type t in x.ChildType.Assembly.GetTypes())
{
if (t.BaseType.IsGenericType)
{
if (t.BaseType.GetGenericTypeDefinition() == typeof(ClassMapExt<>))
{
if (t.BaseType.GetGenericArguments()[0] == x.ChildType)
{
// t is BonusMap. BonusMap is declared as:
// class BonusMap : ClassMapExt<Bonus>
dynamic bz = Activator.CreateInstance(t);
// the last line is analogous to:
// var bz = new BonusMap();
// statically casting it doesn't work
// var bz = (ClassMapExt<>) Activator.CreateInstance(t);
foreach (IManyToOneMappingProvider imt1 in bz.ExtReference)
答案 0 :(得分:2)
通常,这样做的方法是在其中包含非通用API(可能具有显式实现)。然后你只需转换到非通用接口。
不完全相同,但有点像:
Type itemType = ...;
IList list = (IList)Activator.CreateInstance(
typeof(List<>).MakeGenericType(itemType));
list.Add(...);