添加项目文件。

MstnAPIAssist/Managed/ElementHelper.cpp

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+#include "../pch.h"
+#include "ElementHelper.h"
+#include <vector>
+#include <msclr/marshal.h>
+#include "../Native/CElementHelper.h"
+
+void BRDI::MstnAPI::ElementHelper::CreateLineElement(GeomNet::DPoint3d startPoint, GeomNet::DPoint3d endPoint)
+{
+    DPoint3dCP pStartPoint = reinterpret_cast<DPoint3dCP>(&startPoint); // GeomNet::DPoint3d是值类型，位于调用栈，不需要固定，直接取地址
+    DPoint3dCP pEndPoint = reinterpret_cast<DPoint3dCP>(&endPoint);
+    CElementHelper elemHelper;
+    elemHelper.CreateLineElement(pStartPoint, pEndPoint);
+}
+
+void BRDI::MstnAPI::ElementHelper::CreateLineStringElement(array<GeomNet::DPoint3d>^ points)
+{
+    pin_ptr<GeomNet::DPoint3d> pPoints = &points[0]; // array<GeomNet::DPoint3d>^位于托管堆，需要先固定
+    DPoint3dCP pNativePoint = reinterpret_cast<DPoint3dCP>(pPoints);
+    int pointCount = points->Length;
+    CElementHelper elemHelper;
+    elemHelper.CreateLineStringElement(pNativePoint, pointCount);
+}
+
+void BRDI::MstnAPI::ElementHelper::CreateCurveElement(GeomNet::CurveVector^ curveVector)
+{
+    CurveVectorCP pCurveVector = static_cast<CurveVectorCP>(GeomNet::CurveVector::DereferenceToNative(curveVector, false).ToPointer());
+    CElementHelper elemHelper;
+    elemHelper.CreateCurveElement(pCurveVector);
+}
+
+void BRDI::MstnAPI::ElementHelper::BodyFromLoft(array<GeomNet::CurveVector^>^ profiles, DgnPlatformNET::DgnModelRef^ dgnModelRef)
+{
+    std::vector<CurveVectorPtr> curveVectorPtrs;
+    for each (GeomNet::CurveVector ^ profile in profiles)
+    {
+        CurveVectorPtr pCurveVector = static_cast<CurveVectorP>(GeomNet::CurveVector::DereferenceToNative(profile, false).ToPointer());
+        curveVectorPtrs.push_back(pCurveVector);
+    }
+
+    int profileCount = profiles->Length;
+    DgnModelRefP pDgnModelRef = static_cast<DgnModelRefP>(dgnModelRef->GetNative().ToPointer());
+    CElementHelper elemHelper;
+    elemHelper.BodyFromLoft(&curveVectorPtrs[0], profileCount, pDgnModelRef);
+}
+
+void BRDI::MstnAPI::ElementHelper::ShowMessage(String^ message)
+{
+    msclr::interop::marshal_context context;
+    WCharCP msg = context.marshal_as<WCharCP>(message);
+    CElementHelper elemHelper;
+    elemHelper.ShowMessage(msg);
+}