Search:   Namespaces Discussions .NET v1.1 Feedback

NullReferenceException using static members in a multi-thread .exe Messages   Related Types This message was discovered on microsoft.public.dotnet.framework. Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions. Post a new message to this list... RobyFerro (VIP) Using a class with static members in a multi-thread executable results in 'System.NullReferenceException' exception. This happen only if the class is not initialized (calling any static member) before trheads start. The exception is not throw if: - If I invoke a static member in main before threads start. - The class is included in the application project and I don't use an external library. Following there is a sample of a solution that have the problem. All happen with: .Net Framework 1.1.4322, Windows 2000 SP4, Visual Studio ..Net 2003 7.1.3088. Any help would be appreciated. Thanks Reply to this message...        Sherif ElMetainy Hello Are you using ThreadStatic attribute? If so, the variable may be initialized in one thread, and not initialized in another thread. You need to post short code that demonstrates your problem to help people help you. Best regards, Sherif "RobyFerro" <Click here to reveal e-mail address> wrote in message news:Click here to reveal e-mail address... [Original message clipped] Reply to this message...        RobyFerro (VIP) Hello, In this case I don't need to use ThreadStatic attribute for the static members. The class is a helper class to retrieve a connection string from configuration file (in the samples the connection string is a constant string), so the connection string is the same for all threads. Anyway I tested ThreadStatic attribute with a proper initialization member (without using a constructor). I will use this method only if there's no other way, About the sample it is the result of a long test and I can't reduce anymore (I need 2 project application+library, I need a OpenConnection function, a constructor, ecc.). Thanks RobyFerro "Sherif ElMetainy" wrote: [Original message clipped] Reply to this message...     System.NullReferenceException Ad MBR BootFX Best-of-breed application framework for .NET projects, developed by Matthew Baxter-Reynolds and MBR IT

Copyright © Matthew Baxter-Reynolds 2001-2008. '.NET 247 Software Development Services' is a trading style of MBR IT Solutions Ltd. Contact Us - Terms of Use - Privacy Policy - www.dotnet247.com