第二種作法, 將結構傳入c++中memcpy填值, 該作法Data在c#中一定要是struct不能為class

2.cpp

PLUGIN_DLL_API bool GetDataRef(const int data_id,
    Data* ref)
{

  const go3::BuildDataPN* report = go3::BuildDataTable3::Instance().GetTableData(data_id);
  if (NULL == report)
  {
    return NULL;
  }

  size_t TargetSize = sizeof(*ref);
  size_t SourceSize = sizeof(*report);
  if (TargetSize == SourceSize)
  {
    memcpy(ref, report, TargetSize);
  }
  else
  {
    memset(ref, 1, TargetSize);
  }

  return true;
}

2.cs

[DllImport(SysPluginBase.PlatformDllName)]
private static extern bool GetDataRef(int id, ref Data Dta);
public Data GetData(int id)
{

  Data Dta = new Data();
  bool IsSuccess = false;

  IsSuccess = GetDataRef(id, ref Dta);
  if(IsSuccess)
    return Dta;
  return null;  
}