https://blog.csdn.net/dengyiyu/article/details/2201175

本文主要给大家介绍一下SmartSoft中用C#.Net实现AutoCAD块属性提取的方法,并给出实例代码与大家共享。此类实现AutoCAD块属性提取功能,在VS.Net2003(2005)+AutoCAD2004(2007)下调试通过。

using System;
  using AutoCAD=Autodesk.AutoCAD.Interop;
  using System.Runtime.InteropServices ;
  using dbx = Autodesk.AutoCAD.Interop.Common;
  namespace SmartSoft.ACAD
  {
  ///
  /// 读取AutoCAD属性信息
  ///
  public class AutoCADConnector:IDisposable
  {
  private AutoCAD.AcadApplication _Application;
  private bool _Initialized;
  private bool _Disposed;
  #region 类初始化及析构操作
  ///
  /// 类初始化,试图获取一个正在运行的AutoCAD实例,
  /// 如果没有则新起动一个实例。
  ///
  public AutoCADConnector()
  {
  try
  {
  //取得一个正在运行的AUTOCAD实例
  this._Application = (AutoCAD.AcadApplication)Marshal.GetActiveObject("AutoCAD.Application.17");
  }//end of try
  catch
  {
  try
  {
  //建立一个新的AUTOCAD实例,并标识已经建立成功。
  _Application = new AutoCAD.AcadApplicationClass();
  _Initialized=true;
  }
  catch
  {
  throw new Exception ("无法起动AutoCAD应用程序,确认已经安装");
  }
  }//end of catch
  }//end of AutoCADConnector
  ~AutoCADConnector()
  {
  Dispose(false);
  }
  public void Dispose()
  {
  Dispose(true);
  GC.SuppressFinalize(this);
  }
  protected virtual void Dispose(bool disposing)
  {
  if (!this._Disposed && this._Initialized )
  {
  //如果建立了AUTOCAD的实列,调用QUIT方法以避免内存漏洞
  this._Application.ActiveDocument.Close (false,"");
  this._Application.Quit();
  this._Disposed=true;
  }
  }
  #endregion
  #region 公共用户接口属性
  ///
  /// 取得当前类所获得的AUTOCAD实例
  ///
  public AutoCAD.AcadApplication Application
  {
  get
  {
  return _Application;
  }
  }//end of Application
  #endregion
  #region 公共用户接口方法
  ///
  /// 根据给定的文件名以AxDbDocument类型返回该文档
  ///
  public dbx.AxDbDocument GetThisDrawing(string FileName,string PassWord)
  {
  ACAD.AutoCADConnector Connector=new AutoCADConnector();
  //这是AutoCAD2004的Programe ID
  string programeID ="ObjectDBX.AxDbDocument.17";
  AutoCAD.AcadApplication AcadApp = Connector.Application;
  dbx.AxDbDocument dbxDoc;
  dbxDoc=(dbx.AxDbDocument)AcadApp.GetInterfaceObject(programeID);
  try
  {
  if (System.IO.File.Exists (FileName)==false) throw new Exception ("文件不存在。");
  dbxDoc.Open(FileName,PassWord);
  }// end of try
  catch (Exception e)
  {
  System.Windows.Forms.MessageBox.Show(e.Message );
  dbxDoc=null;
  }
  return dbxDoc;
  }//end of function GetThisDrawing
  ///
  /// 根据当前文档和块名取得当前块的引用
  ///
  public dbx.AcadBlockReference GetBlockReference(dbx.AxDbDocument thisDrawing,string blkName)
  {
  dbx.AcadBlockReference blkRef=null;
  bool found = false;
  try
  {
  foreach (dbx.AcadEntity entity in thisDrawing.ModelSpace )
  {
  if (entity.EntityName=="AcDbBlockReference")
  {
  blkRef=(dbx.AcadBlockReference)entity;
  //System.Windows.Forms.MessageBox.Show(blkRef.Name);
  if (blkRef.Name.ToLower() ==blkName.ToLower() )
  {
  found = true;
  break;
  }
  }//end of entity.EntityName=="AcDbBlockReference"
  }// end of foreach thisDrawing.ModelSpace
  }//end of try
  catch (Exception e)
  {
  System.Windows.Forms.MessageBox.Show ("图形中有未知的错误,格式不正确或图形数据库需要修愎。系统错误提示:" + e.Message ,"信息",System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Warning);
  thisDrawing=null;
  }//end of catch
  if (!found) blkRef = null;
  return blkRef;
  }//end of function GetBlockReference
  ///
  /// 根据给定的块引用(dbx.AcadBlockReference)和属性名返回属性值
  ///
  public object GetValueByAttributeName(dbx.AcadBlockReference blkRef,string AttributeName)
  {
  object[] Atts=(object[])blkRef.GetAttributes();
  object attValue=null;
  for (int i=;i
  {
  dbx.AcadAttributeReference attRef;
  attRef=(dbx.AcadAttributeReference)Atts[i];
  if (attRef.TagString==AttributeName)
  {
  attValue= attRef.TextString ;
  break;
  }
  }//end of for i
  return attValue;
  }// end of function
  #endregion
  }//end of class CAutoCADConnector
  }//end of namespace AutoCAD
05-20 17:52