Application crashes when dotnet to com navigation

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1.00/5 (3 votes)

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Hi all,

I am working on one of my project in vb.net.

I am having problem in one of my cases which is as follows.

i have one form in dotnet solution, now on clicking of Ok on that form i will be calling a method which implements the COM interface method.in that method i am throwing an error in a particular case ,now catch is handled and inside that catch i need to inform to Com solution that error has occured .

but when i wrote throw in the catch block it says "

SQL

Fatal Execution Engine Error

" and my dotnet solution is getting crashed.Googled it but havent got idea what cause s this error and hoe to fix it?

Anybody Please suggest

Also i have given the COM reference to dotnet solution by by Add Reference-->COM add TLB direclty instead of generating dll and proceeding

Posted 2-Dec-15 7:07am

vAS21

Updated 2-Dec-15 7:14am

v2

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Comments

Nathan Minier 2-Dec-15 13:22pm

Writing throw in a catch block is completely redundant; it basically says "if there's an exception, throw it again to the operational environment." This is really only appropriate in a development environment, and then it should throw a NotImplementedException() instead.

If you're trying to handle the exception, and you know exactly what it is, perform your error handling and do not re-throw it. You can always wrap the calling code in a try-catch block if necessary.

vAS21 2-Dec-15 13:26pm

Thansk Nathan,

But in COM code one operation will be going on, if there is any exception in my current dotnet method it should inform COM that error has occured so stop the process, for that in my catch i need to throw the exception to COM

CHill60 4-Dec-15 4:30am

It sounds like you should be running that process in a separate thread - are you using a threading model? Without seeing any of your code it is very difficult for any of us to offer suggestions!

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