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标题: 读取带属性块的属性？？ [打印本页]

作者: zy19860604 时间: 2011-10-21 08:59
标题: 读取带属性块的属性？？
using System;
using System.Collections.Generic;
using System.Text;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.DatabaseServices;
namespace MyApplication
{
class DumpAttributes
{
      [CommandMethod("LISTATT")]
      public void ListAttributes()
      {
         Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
         Database db = HostApplicationServices.WorkingDatabase;
         Transaction trans = db.TransactionManager.StartTransaction();
         try
         {
            TypedValue[] filList = new TypedValue[1];
            filList[0] = new TypedValue((int)DxfCode.Start, "Insert");
            SelectionFilter filter = new SelectionFilter(filList);
            PromptSelectionOptions opts = new PromptSelectionOptions();
            opts.MessageForAdding = "Select block references:";
            PromptSelectionResult res = ed.GetSelection(opts, filter);
            if (res.Status != PromptStatus.OK)
            {
                  return;
            }
            SelectionSet selSet = res.Value;
            ObjectId[] idArray = selSet.GetObjectIds();
            foreach (ObjectId blkId in idArray)
            {
                  BlockReference blkRef = (BlockReference)trans.GetObject(blkId, OpenMode.ForRead);
                  BlockTableRecord btr = (BlockTableRecord)trans.GetObject(blkRef.BlockTableRecord, OpenMode.ForRead);
                  ed.WriteMessage("\nBlock:" + btr.Name);
                  btr.Dispose();
                  AttributeCollection attCol = blkRef.AttributeCollection;
                  foreach (ObjectId attId in attCol)
                  {
                     AttributeReference attRef = (AttributeReference)trans.GetObject(attId, OpenMode.ForRead);
                     string str = ("\n Attribute Tag:" + attRef.Tag + "\n Attribute String" + attRef.TextString);
                     ed.WriteMessage(str);
                     trans.Commit();
                  }
            }
         }
         catch (Autodesk.AutoCAD.Runtime.Exception ex)
         {
            ed.WriteMessage(ex.Message);
         }
         finally
         {
            trans.Dispose();
         }
      }
}
}

AttributeCollection attCol = blkRef.AttributeCollection;
对象的当前状态使该操作无效。为什麽？？

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