C#调用C/C++dll的方法（近期研究的课题）

维生素C的作用与摄取方法 #生活百科# #百科知识#

转载自https://www.cnblogs.com/bizca/p/4962559.html   bizca大神的博客

NX Open,怎样取到面的环LOOP

 在封装的ufun .NET库里面，对UF_MODL_ask_face_loops这个函数并没有封装，导致我们很多不便，那我们在.NET下怎样才能使用这个函数呢？？当然是手动处理一下

using System;

using System.Collections.Generic;

using System.Runtime.InteropServices;

public class AskFaceLoop

{

public LoopList[] AskFaceLoops(NXOpen.Tag faceTag)

{

System.IntPtr loopT;

NXOpen.Utilities.JAM.StartUFCall();

int errorCode = UF_MODL_ask_face_loops(faceTag,out loopT);

NXOpen.Utilities.JAM.EndUFCall();

if (errorCode != 0)

{

throw NXOpen.NXException.Create(errorCode);

}

System.IntPtr ptr = loopT;

List<LoopList> loopList = new List<LoopList>();

while (ptr != IntPtr.Zero)

{

_loop_list loopListT = (_loop_list)Marshal.PtrToStructure(ptr, typeof(_loop_list));

int count;

errorCode = UF_MODL_ask_list_count(loopListT.edge_list,out count);

NXOpen.Tag[] edgeArray = new NXOpen.Tag[count];

for (int i = 0; i < count; i++)

{

UF_MODL_ask_list_item(loopListT.edge_list, i,out edgeArray[i]);

}

//UF_MODL_delete_list(out loopListT.edge_list);

loopList.Add(new LoopList{Type = loopListT.type,EdgeList = edgeArray});

ptr = loopListT.next;

}

UF_MODL_delete_loop_list(out loopT);

return loopList.ToArray();

}

[DllImport("libufun.dll", EntryPoint = "UF_MODL_ask_face_loops", CallingConvention = CallingConvention.Cdecl,CharSet = CharSet.Ansi)]

internal static extern int UF_MODL_ask_face_loops(NXOpen.Tag face, out IntPtr loopList);

[DllImport("libufun.dll", EntryPoint = "UF_MODL_ask_list_count", CallingConvention = CallingConvention.Cdecl,

CharSet = CharSet.Ansi)]

internal static extern int UF_MODL_ask_list_count(IntPtr list, out int count);

[DllImport("libufun.dll", EntryPoint = "UF_MODL_ask_list_item", CallingConvention = CallingConvention.Cdecl,CharSet = CharSet.Ansi)]

internal static extern int UF_MODL_ask_list_item(IntPtr list, int index, out NXOpen.Tag @object);

[DllImport("libufun.dll", EntryPoint = "UF_MODL_delete_list", CallingConvention = CallingConvention.Cdecl,CharSet = CharSet.Ansi)]

internal static extern int UF_MODL_delete_list(out IntPtr list);

[DllImport("libufun.dll", EntryPoint = "UF_MODL_delete_loop_list", CallingConvention = CallingConvention.Cdecl,CharSet = CharSet.Ansi)]

internal static extern int UF_MODL_delete_loop_list(out IntPtr list);

internal struct _loop_list

{

public int type;

public IntPtr edge_list;

public IntPtr next;

}

public struct LoopList

{

/// <summary>

/// Peripheral=1, Hole=2, Other=3

/// </summary>

public int Type;

public NXOpen.Tag[] EdgeList;

}

}

虽然Nxopen已经封装好了面选择器 

NXOpen.Face face = (NXOpen.Face)face_select0.SelectedObjects.First();

     NXOpen.Edge[] edges = face.GetEdges();

但是学习怎么用C#调用C++/C的dll也是非常重要的，所以接下的学习的课题就是这个了。

近期七七八八的事情太多了，也没办法静下心来写个功能，只能学学一些新的技术（对我而言），每天多了结一点进步一点才能厚积薄发，关键是一天如果从早到晚都没有看过代码的话心里总发慌，有一种莫名的害怕。

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