Plot Preview from Database

lifanvc — Mon, 03 Jan 2022 19:23:32 GMT

I want plot preview not open dwg file, I meet three questions, I need help ,thank you everyone. this is very important for me,help please.
questions:
1.first plot not right;
2.close preview, Layout note the one before preview;

3.preview again ,it's right.

public class Startup { [CommandMethod("PlotPreView")] public void PlotPreView() { Document acDoc = Application.DocumentManager.MdiActiveDocument; var acEdit = acDoc.Editor; using (DocumentLock acLckDoc = acDoc.LockDocument()) { var acDbSave = HostApplicationServices.WorkingDatabase; using (Database acDb = new Database(false, false)) { var localFile = "E:\\plotprevie.dwg"; acDb.ReadDwgFile(localFile, FileOpenMode.OpenForReadAndAllShare, false, null); acDb.CloseInput(true); using (Transaction acTrans = acDb.TransactionManager.StartTransaction()) { HostApplicationServices.WorkingDatabase = acDb; LayoutManager acLayoutMgr = LayoutManager.Current; // 1D4 64B string handle = "1D4"; long lng = Convert.ToInt64(handle, 16); ObjectId objectId = acDb.GetObjectId(false, new Handle(lng), 0); if (objectId == null) return; BlockReference acBrf = acTrans.GetObject(objectId, OpenMode.ForRead) as BlockReference; if (acBrf == null) return; BlockTableRecord acBlkTblRec = acTrans.GetObject(acBrf.OwnerId, OpenMode.ForRead) as BlockTableRecord; Layout acLayout = acBlkTblRec.LayoutId.GetObject(OpenMode.ForWrite) as Layout; acLayoutMgr.CurrentLayout = acLayout.LayoutName; acLayoutMgr.SetCurrentLayoutId(acLayout.ObjectId); acEdit.WriteMessage(acLayoutMgr.CurrentLayout + "3\n"); using (PlotInfo acPlInfo = new PlotInfo()) { acPlInfo.Layout = acLayout.ObjectId; // Get a copy of the PlotSettings from the layout using (PlotSettings acPlSet = new PlotSettings(acLayout.ModelType)) { acPlSet.CopyFrom(acLayout); // Update the PlotSettings object PlotSettingsValidator acPlSetVdr = PlotSettingsValidator.Current; // Set the plot type acPlSetVdr.SetPlotType(acPlSet, Autodesk.AutoCAD.DatabaseServices.PlotType.Extents); // Set the plot scale acPlSetVdr.SetUseStandardScale(acPlSet, true); acPlSetVdr.SetStdScaleType(acPlSet, StdScaleType.ScaleToFit); // Center the plot acPlSetVdr.SetPlotCentered(acPlSet, true); // Set the plot device to use acPlSetVdr.SetPlotConfigurationName(acPlSet, "DWF6 ePlot.pc3", "ANSI_A_(8.50_x_11.00_Inches)"); // Set the plot info as an override since it will // not be saved back to the layout acPlInfo.OverrideSettings = acPlSet; // Validate the plot info using (PlotInfoValidator acPlInfoVdr = new PlotInfoValidator()) { acPlInfoVdr.MediaMatchingPolicy = MatchingPolicy.MatchEnabled; acPlInfoVdr.Validate(acPlInfo); // Check to see if a plot is already in progress if (PlotFactory.ProcessPlotState == ProcessPlotState.NotPlotting) { using (PlotEngine acPlEng = PlotFactory.CreatePreviewEngine((int)PreviewEngineFlags.Plot)) { // Track the plot progress with a Progress dialog using (PlotProgressDialog acPlProgDlg = new PlotProgressDialog(true, 1, true)) { using ((acPlProgDlg)) { // Define the status messages to display // when plotting starts acPlProgDlg.set_PlotMsgString(PlotMessageIndex.DialogTitle, "Plot Progress"); acPlProgDlg.set_PlotMsgString(PlotMessageIndex.CancelJobButtonMessage, "Cancel Job"); acPlProgDlg.set_PlotMsgString(PlotMessageIndex.CancelSheetButtonMessage, "Cancel Sheet"); acPlProgDlg.set_PlotMsgString(PlotMessageIndex.SheetSetProgressCaption, "Sheet Set Progress"); acPlProgDlg.set_PlotMsgString(PlotMessageIndex.SheetProgressCaption, "Sheet Progress"); // Set the plot progress range acPlProgDlg.LowerPlotProgressRange = 0; acPlProgDlg.UpperPlotProgressRange = 100; acPlProgDlg.PlotProgressPos = 0; // Display the Progress dialog acPlProgDlg.OnBeginPlot(); acPlProgDlg.IsVisible = true; // Start to plot the layout acPlEng.BeginPlot(acPlProgDlg, null); // Define the plot output acPlEng.BeginDocument(acPlInfo, acDb.Filename, null, 1, false, null); // Display information about the current plot acPlProgDlg.set_PlotMsgString(PlotMessageIndex.Status, "Plotting: " + acDb.Filename + " - " + acLayout.LayoutName); // Set the sheet progress range acPlProgDlg.OnBeginSheet(); acPlProgDlg.LowerSheetProgressRange = 0; acPlProgDlg.UpperSheetProgressRange = 100; acPlProgDlg.SheetProgressPos = 0; // Plot the first sheet/layout using (PlotPageInfo acPlPageInfo = new PlotPageInfo()) { acPlEng.BeginPage(acPlPageInfo, acPlInfo, true, null); } acPlEng.BeginGenerateGraphics(null); acPlEng.EndGenerateGraphics(null); // Finish plotting the sheet/layout acPlEng.EndPage(null); acPlProgDlg.SheetProgressPos = 100; acPlProgDlg.OnEndSheet(); // Finish plotting the document acPlEng.EndDocument(null); // Finish the plot acPlProgDlg.PlotProgressPos = 100; acPlProgDlg.OnEndPlot(); acPlEng.EndPlot(null); } } } } } } } HostApplicationServices.WorkingDatabase = acDbSave; } } } } }

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Plot Preview from Database