为什么使用ObjectARX中的命令创建的视口不保存到数据库中

Question

摘要

我正试图编写一个C#ObjectARX脚本，使用-VPORTS Fit命令创建一个适合布局范围的视口，但由于某些原因，新视口显示在AutoCAD中，但从未保存到输出图形中。

我试过的一些东西

• 使用acDoc.SendStringToExecute()而不是acDoc.Editor.Command()
• 用-VPORTS代替._VIEWPORTS
• 在提交事务之前运行命令
  • 导致AutoCAD冻结并崩溃。我想我必须提交新布局，然后才能制作视口

代码段

[CommandMethod("CreateViewport")]
public static void CreateViewport()
{
// Get the current document and database, and start a transaction
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
try
{
Entity acObj = null;
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Omitted code for opening block record ...
// Switch to the previous Paper space layout
Application.SetSystemVariable("TILEMODE", 0);
acDoc.Editor.SwitchToPaperSpace();
// Omitted code for creating a polyline in model space to focus on (acObj) ...
// Omitted code for creating a new layout ...
// Save the new objects to the database
acTrans.Commit();
}
// This is the part that shows in AutoCAD but doesn't save
acDoc.Editor.Command("._VIEWPORTS", "Fit");
acDoc.Editor.Command("._MSPACE");
acDoc.Editor.Command("._ZOOM", "_O", SelectionSet.FromObjectIds(new ObjectId[] { acObj.ObjectId }), "");
acDoc.Editor.Command("._PSPACE");
acDoc.Editor.Command("._ZOOM", "E");
acCurDb.SaveAs("OutputDrawing.dwg", DwgVersion.AC1027);
}
catch (Exception ex)
{
Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage(ex.ToString());
}
}

Answer 1

我已经就此直接与Autodesk进行了交谈，看起来我的问题是删除旧视口并创建新视口的方式。他们对我的代码进行了以下更改，并按预期工作

[CommandMethod("CreateViewport")]
public static void CreateViewport()
{
// Get the current document and database, and start a transaction
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;
try
{
Entity acObj = null;
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) as BlockTable;
// Open the Block table record Model space for write
BlockTableRecord acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
// Draw the desired viewport on the default layer
// Create a circle that is at 2,3 with a radius of 4.25
Circle acCirc = new Circle();
acCirc.SetDatabaseDefaults();
acCirc.Center = new Point3d(2, 3, 0);
acCirc.Radius = 4.25;
acObj = acCirc;
acBlkTblRec.AppendEntity(acObj);
acTrans.AddNewlyCreatedDBObject(acObj, true);
// Set current layer to 0
acCurDb.Clayer = acObj.LayerId;
// Switch to the previous Paper space layout
Application.SetSystemVariable("TILEMODE", 0);
acDoc.Editor.SwitchToPaperSpace();
// List Layouts
DBDictionary layoutDic = acTrans.GetObject(acCurDb.LayoutDictionaryId, OpenMode.ForRead, false) as DBDictionary;
LayoutManager acLayoutMgr = LayoutManager.Current;
Layout acLayout = null;
foreach (DBDictionaryEntry entry in layoutDic)
{
ObjectId layoutId = entry.Value;
Layout currentLayout = acTrans.GetObject(layoutId, OpenMode.ForRead) as Layout;
if (currentLayout.LayoutName == "Layout1")
{
acLayout = acTrans.GetObject(layoutId, OpenMode.ForWrite) as Layout;
// Delete any existing view ports
ObjectIdCollection acViewports = acLayout.GetViewports();
foreach (ObjectId acViewportID in acViewports)
{
Viewport acVport = acTrans.GetObject(acViewportID, OpenMode.ForWrite) as Viewport;
acVport.Erase();
}
//create a blank viewport, we need at least one viewport
var btr = (BlockTableRecord)acTrans.GetObject(acLayout.BlockTableRecordId, OpenMode.ForWrite);
var vp = new Viewport();
btr.AppendEntity(vp);
acTrans.AddNewlyCreatedDBObject(vp, true);
break;
}
}
// If layout wasn't found, make it
if (acLayout == null)
{
ObjectId objID = acLayoutMgr.CreateLayout("Layout1");
acLayout = acTrans.GetObject(objID, OpenMode.ForWrite) as Layout;
}
// Set the layout current if it is not already
if (acLayout.TabSelected == false)
{
acLayoutMgr.CurrentLayout = acLayout.LayoutName;
}
PlotSettings acPlSet = new PlotSettings(acLayout.ModelType);
acPlSet.CopyFrom(acLayout);
// Update the PlotConfigurationName property of the PlotSettings object
PlotSettingsValidator acPlSetVdr = PlotSettingsValidator.Current;
acPlSetVdr.SetPlotConfigurationName(acPlSet, "DWG To PDF.pc3", "ANSI_B_(11.00_x_17.00_Inches)");
// Zoom to show the whole paper
acPlSetVdr.SetZoomToPaperOnUpdate(acPlSet, true);
// Update the layout
if (!acLayout.IsWriteEnabled)
{
acLayout.UpgradeOpen();
}                    
acLayout.CopyFrom(acPlSet);
// Save the new objects to the database
acTrans.Commit();
}
acDoc.Editor.Command("._VIEWPORTS", "Fit");
acDoc.Editor.Command("._MSPACE");
acDoc.Editor.Command("._ZOOM", "_O", SelectionSet.FromObjectIds(new ObjectId[] { acObj.ObjectId }), "");
acDoc.Editor.Command("._PSPACE");
acDoc.Editor.Command("._ZOOM", "E");
string dwgPath = @"D:WorkCases8360OutputDrawing_.dwg";
dwgPath = dwgPath.Insert(dwgPath.IndexOf(".dwg"), DateTime.Now.ToString("yyyyMMddHHmmssffff"));
acCurDb.SaveAs(dwgPath, DwgVersion.AC1032);
}
catch (System.Exception ex)
{
Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage(ex.ToString());
}
}