Question

我正在将一些代码从Ironpython移植到Python.NET。我今天在Git（python 2.76）上运行最新的Python.NET，在Ubuntu 14.04的Mono上运行。到目前为止一直很好，直到我遇到问题，试图明确说明一个通用参数。

我正在使用NHibernate数据库配置代码，我在尝试在C＃类中显式声明泛型参数（NHSearch）时遇到问题，因此C＃强类型语法使其可以推断来自NHSearch.Instance。

python.NET中的违规行是：

db_adapter = DatabaseAdapter.Configure.DatabaseConfiguration(conn_sql).SearchProvider[NHSearch](NHSearch.Instance)

这适用于Ironpython，但在python.NET中，我收到此错误：

Unhandled Exception:
System.ArgumentException: GCHandle value cannot be zero
  at System.Runtime.InteropServices.GCHandle.op_Explicit (IntPtr value)
[0x00000] in <filename unknown>:0
  at Python.Runtime.ManagedType.GetManagedObject (IntPtr ob) [0x00000] in
<filename unknown>:0
  at Python.Runtime.Runtime.PythonArgsToTypeArray (IntPtr arg, Boolean
mangleObjects) [0x00000] in <filename unknown>:0
  at Python.Runtime.MethodBinding.tp_call (IntPtr ob, IntPtr args, IntPtr
kw) [0x00000] in <filename unknown>:0
  at (wrapper native-to-managed) Python.Runtime.MethodBinding:tp_call
(intptr,intptr,intptr)
  at (wrapper managed-to-native) Python.Runtime.Runtime:Py_Main
(int,string[])
  at Python.Runtime.PythonConsole.Main (System.String[] args) [0x00000] in
<filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentException: GCHandle value
cannot be zero
  at System.Runtime.InteropServices.GCHandle.op_Explicit (IntPtr value)
[0x00000] in <filename unknown>:0
  at Python.Runtime.ManagedType.GetManagedObject (IntPtr ob) [0x00000] in
<filename unknown>:0
  at Python.Runtime.Runtime.PythonArgsToTypeArray (IntPtr arg, Boolean
mangleObjects) [0x00000] in <filename unknown>:0
  at Python.Runtime.MethodBinding.tp_call (IntPtr ob, IntPtr args, IntPtr
kw) [0x00000] in <filename unknown>:0
  at (wrapper native-to-managed) Python.Runtime.MethodBinding:tp_call
(intptr,intptr,intptr)
  at (wrapper managed-to-native) Python.Runtime.Runtime:Py_Main
(int,string[])
  at Python.Runtime.PythonConsole.Main (System.String[] args) [0x00000] in
<filename unknown>:0

不确定如何/在何处开始调试或获得更有意义的回溯。任何提示都会有所帮助！如果需要的话，我很乐意提供更多细节，但我不是确定在这个阶段会有什么帮助，所以让我知道。

------------------------------------- EDIT --------- ----------------------------

我想提供更多信息...... c＃中的NHSearch类不完全属于NHibernate。

以下是它的样子：

public class NHSearch : ISearchProvider
   {
      readonly DatabaseAdapter adapter;

      public static NHSearch Instance(DatabaseAdapter adapter)
      {
         return new NHSearch(adapter);
      }

      NHSearch(DatabaseAdapter adapter)
      {
         this.adapter = adapter;
      }

以下是DatabaseAdapter类的示例：

public class DatabaseAdapterBuilder : IConfigurationBuilder<DatabaseAdapter>
   {
      readonly DatabaseAdapter adapter;

      public DatabaseAdapterBuilder(DatabaseAdapter adapter)
      {
         this.adapter = adapter;
      }

      public DatabaseAdapterBuilder DatabaseConfiguration(IPersistenceConfigurer config)
      {
         adapter.DatabaseConfiguration = config;
         return this;
      }

      public DatabaseAdapterBuilder AddConvention(IConvention convention)
      {
         if (adapter.DatabaseConventions == null)
            adapter.DatabaseConventions = new List<IConvention>();

         adapter.DatabaseConventions.Add(convention);

         return this;
      }

      public DatabaseAdapterBuilder SearchProvider<T>(Func<DatabaseAdapter, T> createProvider) where T : ISearchProvider
      {
         adapter.SearchProvider = createProvider(adapter);
         return this;
      }

      public DatabaseAdapter Create()
      {
         return adapter;
      }
   }

Python.NET：显式声明泛型参数获取错误：“System.ArgumentException：GCHandle值不能为零”

0 个答案: