cad.net 以激活形式在前台打开cad文档

在委托的学习一文中,提供了一个函数用于输入路径获取数据库,

而本文提供的是以激活形式打开cad文档,也就是和用户拖动dwg到cad打开一样.

需要对锁文档的有所理解.

容易发生的坑是:不能使用doc.Dispose();

因为我十分喜欢手动释放图元和记录,因为曾经发生过不释放就出错的问题.....

尤其是遍历全图的时候,必须手动释放,不然某些实体没有释放就会引起错误..(可能由于我使用的是Acad2008)

在尼克劳斯的这篇博文里也有说过,不手动释放面域,也会引起错误...

#if !HC2020
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.PlottingServices;
using Autodesk.AutoCAD.Geometry;
using PlotType = Autodesk.AutoCAD.DatabaseServices.PlotType;
using Acap = Autodesk.AutoCAD.ApplicationServices.Application;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Runtime;
#else
using GrxCAD.DatabaseServices;
using GrxCAD.EditorInput;
using GrxCAD.Geometry;
using GrxCAD.ApplicationServices;
using GrxCAD.Runtime;
using GrxCAD.Colors;
using GrxCAD.GraphicsInterface;
using Acap = GrxCAD.ApplicationServices.Application; 
using PlotType = GrxCAD.DatabaseServices.PlotType;
using GrxCAD.PlottingServices; 
#endif

using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Windows.Forms;
using System.Collections.Specialized;

using JoinBox;
using System;
using System.IO;
namespace JoinBox.JoinBox_Code.Winform.批量打印
{
    public class OpreateCad
    {
        [CommandMethod("tete", CommandFlags.Session)]
        public void tete()
        {
            var paths = new List<string>();
            string dwgPath = AutoGo.DwgCurrentPath();
            var ofd = new OpenFileDialog
            {
                AutoUpgradeEnabled = false,//OpenFileDialog会卡顿,用这个就好了
                Filter = "AutoCAD 图形(*.dwg)|*.dwg",
                Multiselect = true,//允许同时选择多个文件  
                InitialDirectory = dwgPath,
            };
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                paths.AddRange(ofd.FileNames);
            }

            ActiveDwg(paths, (doc, layout) =>
            {
                var ed = doc.Editor;
                ed.WriteMessage(Environment.NewLine + "打印的数据库:" + doc.Database.Filename);
                ed.WriteMessage("打印的布局:" + layout.LayoutName);
            });
        }

        /// <summary>
        /// 打开dwg,并且激活
        /// </summary>
        /// <param name="m_ps"></param>
        public static void ActiveDwg(IEnumerable<string> m_ps, Action<Document, Layout> action)
        {
            var m_printfiles = m_ps.ToList();
            for (int i = 0; i < m_printfiles.Count(); i++)
            {
                Opendwg(m_printfiles[i]);
            }

            //遍历激活
            foreach (Document doc in Acap.DocumentManager)
            {
                if (!doc.IsActive && !doc.IsDisposed)//CommandFlags.Session则不会是IsActive的
                {
                    Acap.DocumentManager.MdiActiveDocument = doc;//切换文档,如果切换过来之后后续代码没有执行了,是因为没有CommandFlags.Session
                    var db = doc.Database;
                    using (doc.LockDocument()) //锁定文档,为了切换布局
                    {
                        using (Transaction tr = db.TransactionManager.StartTransaction())
                        {
                            var bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                            foreach (ObjectId btrId in bt)
                            {
                                var btr = tr.GetObject(btrId, OpenMode.ForRead) as BlockTableRecord;
                                if (!btr.IsLayout)
                                {
                                    continue;
                                }

                                var layout = tr.GetObject(btr.LayoutId, OpenMode.ForRead) as Layout;
                                if (LayoutManager.Current.CurrentLayout != layout.LayoutName)
                                {
                                    LayoutManager.Current.CurrentLayout = layout.LayoutName;//非模态这里会失败,所以要锁文档    
                                }
                                action(doc, layout);//然后打印......其他操作.......
                                layout.Dispose();
                                btr.Dispose();
                            }

                            //不是必须的
                            //if (m_printfiles.Contains(doc.Name))  //这里还要判断是不是已经保存了的
                            //{
                            //    //这里一定要保存一次,不然就会切换文档卡死.cad08版本的时候
                            //    doc.SendStringToExecute("_qsave\n", false, true, true); //不需要切换文档
                            //}

                            bt.Dispose();
                            tr.Commit();
                        }
                    }
                    //if (!doc.IsActive)
                    //{
                    //    doc.CloseAndDiscard();
                    //}

#if 重要解释
                    //不可以释放doc,因为切换会导致内存报错问题......
                    //没有CommandFlags.Session的话,释放了之后 doc.IsActive == false了.
                    //doc.Dispose();
#endif
                }
            }
        }


        /// <summary>
        /// 在cad的前台打开dwg
        /// </summary>
        /// <param name="strFileName"></param> 
        public static bool Opendwg(string strFileName)
        {
            var dm = Acap.DocumentManager;
            if (File.Exists(strFileName))
            {
                try
                {
#if NET35 || NET40
                    dm.Open(strFileName, false);
#else
                
                    dm.AppContextOpenDocument(strFileName); 
#endif
                }
                catch (System.Exception e)
                {
                    dm.MdiActiveDocument.Editor.WriteMessage("此文件打开错误: " + strFileName + "\n\r错误信息:" + e.Message);
                    return false;
                }
            }
            else
            {
                dm.MdiActiveDocument.Editor.WriteMessage("此文件不存在: " + strFileName);
                return false;
            }
            return true;
        }
    }
}

(完)