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Using VistaDB 5.1 (and later) with Entity Spaces Print
Modified on: Mon, May 18, 2015 at 1:30 PM
Symptoms
When attempting to use Entity Spaces with VistaDB 5, you can compile the Entity Spaces provider but when attempting a loadall() on any collection you get a MethodAccessException:
Attempt by method 'EntitySpaces.VistaDB5Provider.DataProvider.EntitySpaces.Interfaces.IDataProvider.esLoadDataTable(EntitySpaces.Interfaces.esDataRequest)' to access method 'EntitySpaces.VistaDB5Provider.QueryBuilder.PrepareCommand(EntitySpaces.Interfaces.esDataRequest)' failed.
Cause
VistaDB no longer supports medium trust as of version 5. The VistaDB 4 provider the source code for Entity Spaces is based on has an assemble attribute:
[assembly: AllowPartiallyTrustedCallers]
Resolution
Comment out the aforementioned line in the AssemblyInfo.cs file and recompile. But most importantly don't use the Entity Spaces MTLoader factory.
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