MissingMethodexception con mono

Question

Sono consapevole che in genere, MissingMethodexception in mono significa che stai facendo riferimento a una parte del framework che non è implementato in mono, anche se è disponibile nel framework Microsoft .NET. Tuttavia, in questo caso, sto ricevendo un MissingMethodexception solo fare riferimento a un metodo nel mio codice. Tuttavia, si verifica solo su mono.

Dal momento che l'eccezione non contiene nulla del mio codice fino al metodo mancante, non sono nemmeno sicuro di dove iniziare a cercare il problema.

Ecco l'eccezione:

Unhandled Exception: System.MissingMethodException: Method not found: 'ParkingMapper.GeoHash.IndexGeoHash'.
  at (wrapper managed-to-native) System.Reflection.MonoMethodInfo:get_method_info (intptr,System.Reflection.MonoMethodInfo&)
  at System.Reflection.MonoMethodInfo.GetMethodInfo (IntPtr handle) [0x00000] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\corlib\System.Reflect
ion\MonoMethod.cs:63
  at System.Reflection.MonoMethod.GetPseudoCustomAttributes () [0x00002] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\corlib\System.Reflection\M
onoMethod.cs:295
  at System.MonoCustomAttrs.GetPseudoCustomAttributes (ICustomAttributeProvider obj, System.Type attributeType) [0x0000d] in C:\cygwin\tmp\monobuild\build\BUILD
\mono-2.10.1\mcs\class\corlib\System\MonoCustomAttrs.cs:68
  at System.MonoCustomAttrs.IsDefined (ICustomAttributeProvider obj, System.Type attributeType, Boolean inherit) [0x00039] in C:\cygwin\tmp\monobuild\build\BUIL
D\mono-2.10.1\mcs\class\corlib\System\MonoCustomAttrs.cs:291
  at System.Reflection.MonoMethod.IsDefined (System.Type attributeType, Boolean inherit) [0x00000] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\
corlib\System.Reflection\MonoMethod.cs:276
  at Microsoft.Internal.AttributeServices.IsAttributeDefined[ExportAttribute] (ICustomAttributeProvider attributeProvider, Boolean inherit) [0x00000] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\Microsoft\Internal\AttributeServices.cs:40
  at System.ComponentModel.Composition.AttributedModel.AttributedPartCreationInfo.IsExport (ICustomAttributeProvider attributeProvider) [0x00000] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\AttributedModel\AttributedPartCreationInfo.cs:355
  at System.ComponentModel.Composition.AttributedModel.AttributedPartCreationInfo+<GetExportMembers>c__Iterator0.MoveNext () [0x001b5] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\AttributedModel\AttributedPartCreationInfo.cs:304
  at System.Linq.Enumerable.Any[MemberInfo] (IEnumerable`1 source) [0x00024] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.Core\System.Linq\Enumerable.cs:136
  at System.ComponentModel.Composition.AttributedModel.AttributedPartCreationInfo.HasExports () [0x00000] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\AttributedModel\AttributedPartCreationInfo.cs:106
  at System.ComponentModel.Composition.AttributedModel.AttributedPartCreationInfo.IsPartDiscoverable () [0x0003a] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\AttributedModel\AttributedPartCreationInfo.cs:95
  at System.ComponentModel.Composition.AttributedModel.AttributedModelDiscovery.CreatePartDefinitionIfDiscoverable (System.Type type, ICompositionElement origin) [0x0000a] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\AttributedModel\AttributedModelDiscovery.cs:19
  at System.ComponentModel.Composition.Hosting.TypeCatalog.get_PartsInternal () [0x00051] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\Hosting\TypeCatalog.cs:166
  at System.ComponentModel.Composition.Hosting.TypeCatalog.CreateIndex () [0x0000b] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\System.ComponentModel.Composition\src\ComponentModel\System\ComponentModel\Composition\Hosting\TypeCatalog.cs:263
  at System.Lazy`1[System.Collections.Generic.IDictionary`2[System.String,System.Collections.Generic.List`1[System.ComponentModel.Composition.Primitives.ComposablePartDefinition]]].InitValue () [0x0014f] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.10.1\mcs\class\corlib\System\Lazy.cs:155

Answer 1

Fatto! Sembra che MEF in mono non piaccia una directorycatalog che fa riferimento a DLLS senza esportazioni. Stavo indicando l'attuale directory dell'assemblaggio, che è un no-no in mono.