cad.net undo返回操作

这是提供给从lisp转移到c#实现undo返回步数的函数.

一个需要引用com的dll调用com的方法,
一个是反射调用内部的方法(内置函数,你不需要引用了,可参考VBA帮助文档).

Acad上面调用

引用com的dll

引用dll:
Autodesk.AutoCAD.Interop.Common.dll
Autodesk.AutoCAD.Interop.dll

using Acap = Autodesk.AutoCAD.ApplicationServices.Application;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Interop; //这是acad的com接口
using System.Diagnostics;

namespace JoinBox
{
    public static class Com
    {
#if NET35
        public static AcadDocument Adm { get; }    = Acap.DocumentManager.MdiActiveDocument.AcadDocument as AcadDocument;
#else
        public static AcadDocument Adm { get; }    = Acap.DocumentManager.MdiActiveDocument.GetAcadDocument() as AcadDocument;
#endif

#if !HC2020
        public static AcadApplication App { get; } = Acap.AcadApplication as AcadApplication;
#else
        public static GcadApplication App { get; } = Acap.AcadApplication as GcadApplication;
#endif
    }
}

引用com的dll实现:

需要做到将已经编组的结束并开始新的编组.
这样不会引起嵌套编组.

using Acap = Autodesk.AutoCAD.ApplicationServices.Application;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Interop;
using System.Diagnostics;

namespace JoinBox
{
    // kean谈论到undo撤回的操作
    // https://www.keanw.com/2008/09/more-qListet-comm.html
    public static partial class CadSystem
    {
        /// <summary>
        /// 命令动作编组
        /// </summary>
        /// <param name="flag"><see langword="true"/>开始编组|<see langword="false"/>结束编组</param>
        public static void Undo(bool flag)
        {
            try
            {
                if (!flag)
                {
                    Com.Adm.EndUndoMark();//结束编组
                    return;
                }
                if (Getvar("Undoctl") == "8")//存在活动编组
                    Com.Adm.EndUndoMark();   //结束
                Com.Adm.StartUndoMark();     //开始
            }
            catch (System.Exception e)
            {
                var msg = $"Undo出错,参数{flag},信息:" + e.Message;
                Debug.WriteLine(msg);
                Debugger.Break();
                UndoVBA(flag);
            }
        }

        /// <summary>
        /// 命令动作编组 调用VBA方法
        /// </summary>
        /// <param name="flag"><see langword="true"/>开始编组|<see langword="false"/>结束编组</param>
        public static void UndoVBA(bool flag)
        {
            object adoc = TypeTool.Get(Com.App, "ActiveDocument");
            if (!flag)
            {
                TypeTool.Set(adoc, "EndUndoMark", null); //结束编组
                return;
            }
            if (Getvar("Undoctl") == "8")                //存在活动编组
                TypeTool.Set(adoc, "EndUndoMark", null); //结束
            TypeTool.Set(adoc, "StartUndoMark", null);   //开始
        }
    }
}

using System.Reflection;

namespace JoinBox {
    public static class TypeTool {
        /// <summary>
        /// 获取方法
        /// </summary>
        /// <param name="obj">获取的对象</param>
        /// <param name="fangfaming">方法名</param>
        /// <returns></returns>
        public static object Get(object obj, string fangfaming)
        {
            return obj.GetType().InvokeMember(fangfaming, BindingFlags.GetProperty, null, obj, null);
        }

        /// <summary>
        /// 设置方法的参数
        /// </summary>
        /// <param name="obj">设置的对象</param>
        /// <param name="fangfaming">方法名</param>
        /// <param name="args">参数</param>
        /// <returns>设置的对象</returns>
        public static object Set(object obj, string fangfaming, object[] args)
        {
            return obj.GetType().InvokeMember(fangfaming, BindingFlags.InvokeMethod, null, obj, args);
        }
    }
}

其他CAD引入com

浩辰Gcad

引入dll:
gcax.tlb

添加命名空间:
using GrxCAD.GraphicsInterface;
using GcadVbaLib;

中望Zcad

中望上面实现跟Acad似乎一样,名字改改就好了...
可以在 ZWCAD.exe 反射调用.

引入dll:
lnterop.ZWCAD.dll

添加命名空间:
using ZWCAD.Interop;