사용자 선택에 따라 블록의 정보를 표시하는 코드

Question

이것은 사용자 선택에 따라 dwg에서 블록을 선택하고 mtext를 사용하여 dwg 파일의 블록 세부 정보를 인쇄하지만 mtext는 작동하지 않습니다. 어떤 것. 그것은 저에게 예외를줍니다.

[CommandMethod("LAT")] 
    public void ListAttributes() 
    { 
     Document acDoc = Application.DocumentManager.MdiActiveDocument; 
     Editor ed = 
      Application.DocumentManager.MdiActiveDocument.Editor; 
     Database db = 
      HostApplicationServices.WorkingDatabase; 
     Transaction tr = 
      db.TransactionManager.StartTransaction(); 

     // Start the transaction 
     try 
     { 
      // Build a filter list so that only 
      // block references are selected 
      TypedValue[] filList = new TypedValue[1] { 
     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); 

      // Do nothing if selection is unsuccessful 
      if (res.Status != PromptStatus.OK) 
       return; 

      SelectionSet selSet = res.Value; 
      ObjectId[] idArray = selSet.GetObjectIds(); 
      foreach (ObjectId blkId in idArray) 
      { 
       BlockReference blkRef = 
        (BlockReference)tr.GetObject(blkId, 
        OpenMode.ForRead); 
       BlockTableRecord btr = 
        (BlockTableRecord)tr.GetObject(
        blkRef.BlockTableRecord, 
        OpenMode.ForWrite 
       ); 
       ed.WriteMessage(
        "\nBlock: " + btr.Name 
       ); 
       //btr.Dispose(); 

       AttributeCollection attCol = 
        blkRef.AttributeCollection; 
       foreach (ObjectId attId in attCol) 
       { 
        MText mtext = new MText(); 
        mtext.SetDatabaseDefaults(); 
        mtext.Height = 2; 

        AttributeReference attRef = 
         (AttributeReference)tr.GetObject(attId, 
         OpenMode.ForRead); 

        string str = 
         ////("\n Attribute Tag: " 
         //// + attRef.Tag 
         //// + "\n Attribute String: " 
         ("\n" + attRef.TextString); 
        mtext.Contents = ("hELLO"); 
        acDoc.Editor.WriteMessage("\n" + str); 
        btr.AppendEntity(mtext); 
        tr.AddNewlyCreatedDBObject(mtext, true); 
       } 
      } 
      tr.Commit(); 
     } 
     catch (Autodesk.AutoCAD.Runtime.Exception ex) 
     { 
      ed.WriteMessage(("Exception: " + ex.Message)); 
     } 
     finally 
     { 
      tr.Dispose(); 
     } 
    } 
} 

}

Answer 1

당신은 모델 공간을 통해 반복하고 모든 해치를 찾을 수있다. 는 다음을 수행 할 수있는 방법 중 하나입니다

[CommandMethod("FindAllHatches")] 
public static void FindAllHatches() 
{ 
    Document acDoc = Application.DocumentManager.MdiActiveDocument; 

    acDoc.Editor.WriteMessage("\nSearching for Hatches"); 

    var db = acDoc.Database; 
    using (Transaction transaction = db.TransactionManager.StartTransaction()) 
    { 
     ObjectId idModelSpace = SymbolUtilityServices.GetBlockModelSpaceId(db); 

     BlockTableRecord modelSpace = 
      transaction.GetObject(idModelSpace, OpenMode.ForRead) as 
      BlockTableRecord; 

     var sbReportText = new StringBuilder(); //usging System.Text 
     double fTotalArea = 0.0; 
     int nTotalHatches = 0; 

     foreach (var objId in modelSpace) 
     { 
      var entity = transaction.GetObject(objId, OpenMode.ForRead); 
      Hatch hatch = entity as Hatch; 
      if (hatch == null) 
       continue; //not hatch 

      nTotalHatches++; 
      fTotalArea += hatch.Area; 

      acDoc.Editor.WriteMessage("\nFound Hatch Area={0}", hatch.Area); 
      sbReportText.AppendFormat("Hatch Area={0}\n", hatch.Area); 
     } 

     if (nTotalHatches == 0) 
      return; //no hatches found 

     modelSpace.UpgradeOpen(); 

     MText acMText = new MText(); 
     acMText.SetDatabaseDefaults(); 

     sbReportText.AppendFormat("Count = {0}, Total Area = {1}", 
      nTotalHatches, fTotalArea); 
     acMText.Contents = sbReportText.ToString(); 

     modelSpace.AppendEntity(acMText); 
     transaction.AddNewlyCreatedDBObject(acMText, true); 

     transaction.Commit(); 
    } 
} 

귀하의 acBlkTblRec 내 예에서 modelSpace이다.