tags:

views:

18

answers:

1
Q: 

How can I test if a COM type is registered?

Say I've got a load of COM types and I'd like to check if a particular type has been registered. I can use Activator.CreateInstance to actually try and create the class, but I was wondering if there's a simpler way actually check in advance if the class is actually registered.

I'd prefer not to go to the registry directly - I'm looking for something easy to use like the Activator.CreateInstance call above.

Thanks

+1  A: 
Richard  2010-09-01 08:17:53
Good point - my understanding of how the COM interop works is pretty basic. Thanks for the answer though - it's how I would have naively done it. Out of interest, would the registry way not be a pain if you have to deal with 32\64 bit issues?
cristobalito  2010-09-01 08:30:28
@cristobalito there are potentially a lot of places to check, by restricting to inproc cases you can reduce it to `HKCR:\CLID\<clsid>\InProcServer32` and `HKCU:\Software\Classes\CLSID\<clsid>\InProcServer32` (registry path remapping will handle the 32/64bit issue for you).
Richard  2010-09-01 09:00:06
If you go for the registry solution you need to take care of "reg free COM" also.
Vagaus  2010-09-01 15:19:11

related questions

Displaying Flash content in a C# WinForms application
How to get the value of built, encoded ViewState?
Unhandled Exception Handler in .NET 1.1
How do I connect to a database and loop over a recordset in C#?
How do I most elegantly express left join with aggregate SQL as LINQ query
Get a new object instance from a Type in C#
.NET Testing Framework Advice
Automatically update version number
What is the difference between an int and an Integer in Java/C#?
How to write to Web.Config in Medium Trust ?
WinForms ComboBox data binding gotcha
How do you sort a C# dictionary by value?
Adding Scripting functionality to .NET applications
Floating Point Number parsing: Is there a Catch All algorithm?
How do I print an HTML document from a web service?
Decoding T-SQL CAST in C#/VB.net
Anatomy of a "Memory Leak"
How do I get a distinct, ordered list of names from a DataTable using Linq
Reliable Timer in a Console Application
How do I fill a DataSet or a DataTable from a LINQ query resultset ?
What's the difference between Math.Floor() and Math.Truncate() in .NET?
How do I calculate relative time?
How do I calculate someone's age in C#?
Are there any conversion tools for porting Visual J# code to C#?
When setting a form's opacity should I use a decimal or double?