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#1 Posted : Monday, August 14, 2006 12:39:08 AM(UTC)


Groups: Registered
Posts: 1

Hi, Everybody

I'm trying to use Still Image Reader in my application, which's written entirely in C#/VS2005. It's created succesfullty by the default constructor, like this:
TStlImgRdClass stillIm = new LTStlImgRdClass();
But when I try to use it's properties, for example:
string str = stillIm.RegisteredExtensions;
the InvalidCastException is thrown. The exception message is here:
Unable to cast COM object of type 'LTStlImgRdLib.LTStlImgRdClass' to interface type 'LTStlImgRdLib.ILTStlImgRd'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{E2B7DD5B-38C5-11D5-91F6-00104BDB8FF9}' failed due to the following error: Interface is not supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

Could you please tell me, how to solve the problem? Maybe, the filter is not registered? But I installed Lead Tools succesfully... And if it's so, how to register it correctly?

Try the latest version of LEADTOOLS for free for 60 days by downloading the evaluation: https://www.leadtools.com/downloads

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#2 Posted : Tuesday, August 15, 2006 10:39:57 PM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)


If you try to use it as follows, do you get the same exception?
LTStlImgRdLib.LTStlImgRdClass stillIm = new LTStlImgRdLib.LTStlImgRdClass();
string str = stillIm.RegisteredExtensions;

Please let me know how it goes.

Maen Badwan
LEADTOOLS Technical Support
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