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Friday, February 10, 2012

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Menu       Home What is NDO? - Executive Overview - NDO for Developers How NDO Works - Persistent Classes - Mapping - Queries - Reverse Engineering - Inheritance, Polymorphism - Distributed Applications Licensing Support - Support Forum - FAQ - Solutions - Downloads - E-Mail Support - Tutorial Videos Online Shop Contact	Welcome!     Welcome to the NDO support forum!  Please register/login at the site if you want to post a thread. We sometimes copy support mails of common interest to the forum. They appear with anonymous sender.  Please post your messages in English language if possible. You can do your posts also in German, we will translate your post and our answer so that all users of the forum can read your posts.  The forum software requires that javascript is enabled.  Please do not insert licence information or licence keys in forum posts.  If you know a good answer to a post of another user, feel free to reply!  The forum is monitored. We reserve the right to remove posts we consider not to be useful for other forum users.  NDO Support Forum     Search Forum Home   NDO-Forum postings in english please, if possible.  Developing with NDO  "Object re...  "Object reference not set to an instance of an object." when trying to duplicate example from video    11/16/2006 9:02:49 AM Vutborg 1 posts "Object reference not set to an instance of an object." when trying to duplicate example from video   Hi NDO When I try to duplicate the example from your turorial video 1 and i want to receive the employee back from the database, i get an error for the following code: PersistenceManager pm = new PersistenceManager(); NDOQuery q = new NDOQuery(pm); List myList = q.Execute(); When using the Watch-window in VS, and typing in "q.Execute()" i get: + q.Execute(); 'q.Execute()' threw an exception of type 'System.NullReferenceException' System.Collections.Generic.List {System.NullReferenceException} Can anyone help? /René  11/21/2006 12:25:47 PM Mirko 109 posts Re: "Object reference not set to an instance of an object." when trying to duplicate example from video Hi René, the Tutorial application shown in the vidio is part of the NDO distribution (in the subdirectory "Tutorial"). Did you try to run the application from there? Maybe you can see the difference between your code and our code provided in the application. If you have further questions, please feel free to ask. Best Regards: Mirko  5/4/2007 9:31:46 PM seanevans 3 posts Re: "Object reference not set to an instance of an object." when trying to duplicate example from video Rene, You must tell NDO the type of object you are querying for: NDOQuery<Employee> q = new NDOQuery<Employee>(pm);  Page 1 of 1   NDO-Forum postings in english please, if possible.  Developing with NDO  "Object re... Flat View Tree View Oldest To Newest Newest To Oldest   Search  Forum Home