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I'm getting NotImplementedException when I tried to get the Count property from the IContianer object.

Posted on 2006-07-21

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Last Modified: 2010-08-05

I'm getting NotImplementedException when I tried to get the Count property from the IContianer object iconComputers. What does this error mean? How can I correct this problem? Thanks.

//deGlobalComputers is a DirectoryEntry object.
IADsContainer iconComputers = (IADsContainer)deGlobalComputers.NativeObject;
IADsContainer iconUsers = (IADsContainer)deGlobalComputers.NativeObject;
IADsContainer iconGroups = (IADsContainer)deGlobalComputers.NativeObject;
iconComputers.Filter = new object[] {"meeting"};
int numOfComputers = iconComputers.Count;
--
Thanks.

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Question by:lapucca

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4 Comments

LVL 30

Accepted Solution

by:Alexandre Simões

Alexandre Simões earned 250 total points

ID: 171593032006-07-22

Hi!

IContainer is an interface, not a class.
The code you provided is abstract, as you're dealing only with method signatures, not real code.

IADsContainer iconComputers = (IADsContainer)deGlobalComputers.NativeObject;
Here looks like you're assigning the (IADsContainer)deGlobalComputers.NativeObject to an Interface.

The exception you're having is automatically writen by the VS 2005 when we implement an interface thru Refactoring.

I don't know what that IADsContainer object is... by the name looks like an Interface (starts with an I), but if you have more code you can post it.

Alex

LVL 5

Expert Comment

by:paulb1989

ID: 171613742006-07-22

If 'Count' not implemented then maybe you could do this:

int numOfComputers = iconComputers.Count;
foreach (object o in iconComputers)
numOfComputers++;

LVL 5

Assisted Solution

by:paulb1989

paulb1989 earned 250 total points

ID: 171613792006-07-22

Sorry, I meant this:

int numOfComputers = 0;
foreach (object o in iconComputers)
numOfComputers++;

Author Comment

by:lapucca

ID: 171638132006-07-23

Thanks Paul. I already have coded it that way but I want to know why the IContainer code won't work. As both of you have pointed out that Count property isn't implemented so I'll just split the points between you 2. Thank you both.

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