C# 添加右键菜单实例

7.兮♂贝 · 发表于 2013-7-26 16:46:00

遇到一个问题，估计以后也会经常遇到，所以想问问各位大虾，这个问题出在哪里。详细代码我会贴到2楼。
整个功能是通过自定义CAD操作命令，完成鼠标右键的菜单添加，同时点击该菜单，将执行画一条直线的动作。
菜单添加成功，执行画一条直线的代码也成功。但是将两者联合起来，就会报 ”eLockViolation”。
拜托大侠
知识点：
加入到应用程序级的右键菜单中
Application.AddDefaultContextMenuExtension
加入到某一种对象的右键菜单中，比如圆、直线等
Application.AddObjectContextMenuExtension

7.兮♂贝 · 发表于 2013-7-26 16:46:00

//右键菜单
      [CommandMethod("addcontext")]
      public void AddContextMenu()
      {
            //右键菜单对象
            ContextMenuExtension m_ContextMenu = new ContextMenuExtension();
            m_ContextMenu.Title = "ContextMenu Sample";
            //右键菜单项及其事件
            MenuItem MenuItem_1 = new MenuItem("Create Line");
            MenuItem_1.Click += new EventHandler(MenuItem_1_Click);
            //菜单项添加到右键菜单
            m_ContextMenu.MenuItems.Add(MenuItem_1);
            //加入到应用程序级的右键菜单中
            Application.AddDefaultContextMenuExtension(m_ContextMenu);
            //加入到某一种对象的右键菜单中
            //Application.AddObjectContextMenuExtension(RXClass.GetClass(System.Type.GetType("Circle")), m_ContextMenu);
      }
      private void MenuItem_1_Click(object sender, System.EventArgs e)
      {
         Document doc = Application.DocumentManager.MdiActiveDocument;
         Database db = HostApplicationServices.WorkingDatabase;
         Editor ed = doc.Editor;
         using (Transaction trans = db.TransactionManager.StartTransaction())
         {
            PromptPointOptions pointOpts,otherOpts;
            PromptPointResult pointResult,otherResult;
            Point3d firstPnt = new Point3d();
            Point3d OtherPnt = new Point3d();
            Line tLine;
            pointOpts = new PromptPointOptions("please select a point: ");
            pointResult = ed.GetPoint(pointOpts);
            if (pointResult.Status == PromptStatus.OK)
                  firstPnt = pointResult.Value;
            otherOpts = new PromptPointOptions("\n select other point: ");
            otherResult = ed.GetPoint(otherOpts);
            if (otherResult.Status == PromptStatus.OK)
                  OtherPnt = otherResult.Value;
            try
            {
                  //得到当前数据库块表
                  BlockTable bt = (BlockTable)(trans.GetObject(db.BlockTableId, OpenMode.ForRead));
                  BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                  tLine = new Line(firstPnt, OtherPnt);
                  //往数据库中添加实体
                  btr.AppendEntity(tLine);
                  trans.AddNewlyCreatedDBObject(tLine, true);
                  trans.Commit();
            }
            catch(Autodesk.AutoCAD.Runtime.Exception g)
            {
                  Application.ShowAlertDialog(g.Message);
                  trans.Abort();
            }
         }
      }

sieben · 发表于 2013-7-26 18:57:00

DocumentLock dlock = Application.DocumentManager.MdiActiveDocument.LockDocument();
   try
   {
;;把你画直线的代码放在这里，或者说需要访问Database的代码放在这里
   }
   catch (System.Exception ex)
   {
   }
   finally
   {
      dlock.Dispose();
   }