using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
//用于圖形文件中對對象的操作
//當處理圖形文件中存儲的對象中
//acdbmgd.dll
using?Autodesk.AutoCAD.Colors;
using?Autodesk.AutoCAD.DatabaseServices;
using?Autodesk.AutoCAD.Geometry;
using?Autodesk.AutoCAD.Runtime;
//using?Autodesk.AutoCAD.GraphicsInterface;
using?Autodesk.AutoCAD.layerManager;

//用于對AutoCad應用程序進行操作
//當處理AutoCad應用程序和用戶接口時引用
//acmgd.dll
using?Autodesk.AutoCAD.ApplicationServices;
using?Autodesk.AutoCAD.EditorInput;
using?Autodesk.AutoCAD.Windows;
using?Autodesk.AutoCAD.Windows.ToolPalette;
using?Autodesk.AutoCAD.Internal.Windows;
using?Autodesk.AutoCAD.Internal.Forms;


namespace?NetCad
{
????public?static?class?AddEntity
????{
????????#region
????????///?

????????///?向圖形中添加單個實體
????????///?

????????///?圖形數據庫
????????///?圖形對象
????????///?返回圖形objectid
????????public?static?objectId?AddEntityToModelSpass（Database?db?Entity?ent）
????????{
????????????//聲明一個objectid，用于返回，以便后期修改圖形的顏色等等。
????????????objectId?entId?=?objectId.Null;
????????????//開啟事務處理
????????????Transaction?trans?=?db.TransactionManager.StartTransaction（）;
????????????using?（trans）
????????????{
????????????????//打開塊表
????????????????BlockTable?blkTbl?=?trans.Getobject（db.BlockTableId?OpenMode.ForRead）?as?BlockTable;
????????????????//打開塊表記錄
????????????????BlockTableRecord?blkTbRec?=?trans.Getobject（blkTbl[BlockTableRecord.ModelSpace]?OpenMode.ForWrite）?as?BlockTableRecord;
????????????????//添加圖形到塊表記錄
????????????????//AppendEntity（）返回值是objectid
????????????????entId?=?blkTbRec.AppendEntity（ent）;
????????????????//更新數據信息
????????????????trans.AddNewlyCreatedDBobject（ent?true）;
????????????????//提交事務
????????????????trans.Commit（）;
????????????}
????????????return?entId;
????????}
????????#endregion

????????#region
????????///?

????????///?向圖形中添加多個實體
????????///?

????????///?圖形數據庫
????????///?圖形對象，可變參數
????????///?objectID，數組返回
????????public?static?objectId[]?AddEntityToModelSpace（Database?db?params?Entity[]?ent）
????????{
????????????objectId[]?entId?=?new?objectId[ent.Length];
????????????Transaction?trans?=?db.TransactionManager.StartTransaction（）;
????????????using?（trans）
????????????{
????????????????BlockTable?blkTbl?=?trans.Getobject（db.BlockTableId?OpenMode.ForRead）?as?BlockTable;
????????????????BlockTableRecord?blkTblRec?=?trans.Getobject（blkTbl[BlockTableRecord.ModelSpace]?OpenMode.ForWrite）?as?BlockTableRecord;

????????????????for?（int?i?=?0;?i?????????????????{
????????????????????entId[i]?=?blkTblRec.AppendEntity（ent[i]）;
????????????????????trans.AddNewlyCreatedDBobject（ent[i]?true）;
????????????????}

????????????????trans.Commit（）;
????????????}
????????????return?entId;
????????}
????????#endregion


????