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You can try reading the Registry and see if you can find that ID in the registry.<br />
Then you will know if it exists or not.<br />
<br />
There are some configurations that may deny registry access - however you should give it a try.<br />

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You can try reading the Registry and see if you can find that ID in the registry.
Then you will know if it exists or not.

There are some configurations that may deny registry access - however you should give it a try.


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I have tried to catch the exception but a dialog box pop up with message &quot;... :Retrieving the COM class factory for component ... failed due to the following error: 80040154 ...&quot;.<br />
I have also tried reading the registry but not all client PC has the necessary rights to access it.<br />
<br />
I need a better (more graceful) method to disallow user to use the Excel Automation Library if it is not present.<br />

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I have tried to catch the exception but a dialog box pop up with message "... :Retrieving the COM class factory for component ... failed due to the following error: 80040154 ...".
I have also tried reading the registry but not all client PC has the necessary rights to access it.

I need a better (more graceful) method to disallow user to use the Excel Automation Library if it is not present.


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Did you debug the application? On which line does it fail?
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Did you debug the application? On which line does it fail?

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OK, the error message was from the exception caught.<br />
I missed the point. Answer accepted. Thanks.<br />

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OK, the error message was from the exception caught.
I missed the point. Answer accepted. Thanks.


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<div class="content wysiwyg-content">
Is there anyway to verify if required version of Excel Automation Library exist in C#?<br />
I would like to check for its existence before instantiate an instance of Excel.Application to prevent an error message that say Excel does not exist.<br />

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Is there anyway to verify if required version of Excel Automation Library exist in C#?
I would like to check for its existence before instantiate an instance of Excel.Application to prevent an error message that say Excel does not exist.


C# Excel Automation Library Exist?

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).