从程序得到AutoCAD的块属性从AutoCAD程序使用pickfirst选择集.docx

从.NET程序得到AutoCAD的块属性(2006.9.15)?下面的代码要求用户选择块引用，然后在他们中查找包含的属性，然后在AutoCAD控制台中显示。using Autodesk.AutoCAD;using Autodesk.AutoCAD.Runtime;using Autodesk.AutoCAD.ApplicationServices;using Autodesk.AutoCAD.DatabaseServices;using Autodesk.AutoCAD.EditorInput;namespace MyApplication{public class DumpAttributes{[CommandMethod(LISTATT)]??? public void ListAttributes()??? {Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;Database db = HostApplicationServices.WorkingDatabase;//与当前文档中的DB的区别？Transaction tr = db.TransactionManager.StartTransaction();Try??//开始事务{//构建一个过滤器以便只有块参照被选择TypedValue[] filList = new TypedValue[1] {new TypedValue((int)DxfCode.Start, INSERT)};SelectionFilter filter = new SelectionFilter(filList);//用过滤器列表来初始化选择过滤器PromptSelectionOptions opts = new PromptSelectionOptions();opts.MessageForAdding = Select block references: ;PromptSelectionResult res = ed.GetSelection(opts, filter);if (res.Status != PromptStatus.OK) //选择不成功就什么都不做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.ForRead);ed.WriteMessage(\nBlock: btr.Name);btr.Dispose();AttributeCollection attCol = blkRef.AttributeCollection;foreach (ObjectId attId in attCol){AttributeReference attRef = (AttributeReference)tr.GetObject(attId, OpenMode.ForRead);string str = (\n? Attribute Tag: attRef.Tag \n??? Attribute String: attRef.TextString);ed.WriteMessage(str);}}tr.Commit();}catch (Autodesk.AutoCAD.Runtime.Exception ex)???{ed.WriteMessage((Exception: ex.Message));}finally{tr.Dispose();}}}} 从AutoCAD .NET程序使用pickfirst选择集(2006.9.18)?许多工作在实体集之上的AutoCAD命令有两种类型的工作方式：动作－名字或名字－动作。这意味着若用户已经预告选择了一个集合的实体(“名字”)，然后发起命令(“动作”)，命令就不会需要请求用户选择他们了。?这就会使用一些东西来调用pickfirst或暗指AutoCAD中的选择集。要在命令中利用这个特性的优势，首先需要使用一个特别的命令标志“UseP