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using reflection to discover a nested structure

All,

Can anyone supply an example or reference to an example of using
reflection to determine the data types contained in a nested stucture
in C#? Once I get the list of MemberInfo[] and determine that
MemberInfo[i].MemberType.ToS tring().Equals( "NestedType "), I cannot
figure out how to drill down from that point.
TIA,
Bill

Oct 25 '06 #1
2 4896
bill wrote:
All,

Can anyone supply an example or reference to an example of using
reflection to determine the data types contained in a nested stucture
in C#? Once I get the list of MemberInfo[] and determine that
MemberInfo[i].MemberType.ToS tring().Equals( "NestedType "), I cannot
figure out how to drill down from that point.
You would have to use Activator.Creat eInstance to get a reference to
the NestedType and then use the same method to drill down.

I think it would be something like this:

ClassA aObj = new ClassA();
Type t = aObj.GetType();

ClassB b = t.InvokeMember( "membername ", BindingFlags.Ge tProperty, null,
aObj, null) as ClassB;

So if "membername " is a property of ClassA that is an instance of
ClassB, the InvokeMember line will get a reference to that member.

I'm now sure how you would change this for your NestedType, but it
should be similar.

Chris

Oct 25 '06 #2
Hi Bill,

Think of it like this: If you knew that a MemberInfo instance was a property,
you would cast it to PropertyInfo. And if a MemberInfo was a field, then you
could cast it to FieldInfo. So what do you cast a MemberInfo to that is a
nested Type? Type. (TypeInfo would be semantically equivalent to Type, so
there is no need for a TypeInfo class :)

class Outer
{
public class Inner
{
public int AField;
}
}

class Program
{
static void Main()
{
foreach (MemberInfo member in typeof(Outer).G etMembers())
{
if (member.MemberT ype == MemberTypes.Nes tedType)
{
// MemberInfo that is a NestedType is just a Type itself
Type nestedType = (Type) member;

Console.WriteLi ne("Members of {0}: ", nestedType);
Console.WriteLi ne();

foreach (MemberInfo nestedMember in nestedType.GetM embers())
{
Console.WriteLi ne("Nested Member: " + nestedMember.Na me);
}
}
}
}

--
Dave Sexton

"bill" <wg****@draper. comwrote in message
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .
All,

Can anyone supply an example or reference to an example of using
reflection to determine the data types contained in a nested stucture
in C#? Once I get the list of MemberInfo[] and determine that
MemberInfo[i].MemberType.ToS tring().Equals( "NestedType "), I cannot
figure out how to drill down from that point.
TIA,
Bill

Oct 25 '06 #3

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