public void ShowIs()
{
ClassAA a = new ClassAA();
ClassAASub aSub = new ClassAASub();
bool isAA = aSub is ClassAA ? true : false;
bool isObject = aSub is object?true : false;
bool isInt = aSub is int?true : false;
Console.WriteLine("ClassAASub is ClassAA: {0} ", isAA);
Console.WriteLine("ClassAASub is object: {0} ", isObject);
Console.WriteLine("ClassAASub is ClassAA: {0} ", isInt);
}
public void ShowAs()
{
ClassAA a = new ClassAA();
JudgeType(a);
ClassAASub sub = new ClassAASub();
JudgeType(sub);
ClassAAA aa = new ClassAAA();
JudgeType(aa);
}
private void JudgeType(object obj)
{
bool isType = obj is ClassAA;
Console.WriteLine("obj is ClassA: {0} ", isType);
isType = false;
ClassAA tempA = obj as ClassAA;
if (tempA != null)
{
isType = true;
Console.WriteLine("obj as ClassAA:{0},NumA={0}", isType);
}
else
{
Console.WriteLine("obj as ClassAA:{0}", isType);
}
}