I have written the following C# code that takes user input of an integer, then plots views in sheets corresponding to polyines in the model space on different layers. For example in the attached file when 3 is input, then 3 views are inserted on sheet 1, sheet 2, and sheet 3. I have the viewports inserting correctly per the code, but when I un-comment the vp.on line I get the error: Autodesk.AutoCAD.Runtime.Exception: 'eNotInPaperspace'. But in the drawing I can easily turn these views on no problem, any ideas here?
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System;
namespace AutoCADExtents
{
public class Commands
{
[CommandMethod("POLYEXTENTS")]
public void GetPolylineExtents()
{
// Get the current document and database
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
// Start a transaction
using (Transaction tr = db.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
// Get the active document and editor
Editor ed = doc.Editor;
// Prompt user for the number of layers/views
PromptIntegerOptions numLayersPromptOptions = new PromptIntegerOptions("\nEnter number of layers/views to create: ");
numLayersPromptOptions.AllowNegative = false;
numLayersPromptOptions.AllowZero = false;
PromptIntegerResult numLayersPromptResult = ed.GetInteger(numLayersPromptOptions);
if (numLayersPromptResult.Status != PromptStatus.OK)
{
ed.WriteMessage("\nInvalid input or user cancelled.");
return;
}
int numLayers = numLayersPromptResult.Value;
// Open the LayoutManager
LayoutManager layoutManager = LayoutManager.Current;
for (int i = 1; i <= numLayers; i++)
{
string sheetName = "Sheet " + i;
// Get or create the layout
Layout layout = tr.GetObject(layoutManager.GetLayoutId(sheetName), OpenMode.ForWrite) as Layout;
// Create or get the first viewport in the layout
Viewport vp = GetOrCreateViewport(tr, layout);
// Set the viewport properties based on overall extents and layout size
SetViewportProperties(tr, layout, vp, bt, ed, i);
// Inform user
ed.WriteMessage($"\nViewport created and adjusted successfully in '{sheetName}'.");
}
tr.Commit(); // Commit the transaction
}
}
private Viewport GetOrCreateViewport(Transaction tr, Layout layout)
{
Viewport vp = null;
// Open the BlockTableRecord for layout
BlockTableRecord layoutRecord = tr.GetObject(layout.BlockTableRecordId, OpenMode.ForWrite) as BlockTableRecord;
// Remove existing viewport if any
foreach (ObjectId objId in layoutRecord)
{
if (objId.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(Viewport))))
{
vp = tr.GetObject(objId, OpenMode.ForWrite) as Viewport;
if (vp != null)
{
vp.Erase();
break;
}
}
}
// Create a new viewport
vp = new Viewport();
layoutRecord.AppendEntity(vp);
tr.AddNewlyCreatedDBObject(vp, true);
return vp;
}
private void SetViewportProperties(Transaction tr, Layout layout, Viewport vp, BlockTable bt, Editor ed, int layerNumber)
{
// Get the overall extents of the entities in model space for the specified layer number
Extents3d overallExtents = GetOverallExtents(tr, bt, layerNumber);
// Check if valid extents were found
if (overallExtents.MinPoint != Point3d.Origin && overallExtents.MaxPoint != Point3d.Origin)
{
// Calculate the center of the extents in model space
Point3d centerPointModelSpace = overallExtents.MinPoint + ((overallExtents.MaxPoint - overallExtents.MinPoint) / 2.0);
// Calculate the layout dimensions in inches (convert mm to inches)
double layoutWidth = 20.3867;
double layoutLength = 25.2982;
// Determine scale factors based on layout dimensions
double scaleHeight = layoutWidth / (overallExtents.MaxPoint.Y - overallExtents.MinPoint.Y);
double scaleWidth = layoutLength / (overallExtents.MaxPoint.X - overallExtents.MinPoint.X);
// Choose the smaller scale factor to fit either width or height
double scaleFactor = Math.Min(scaleHeight, scaleWidth);
// Set the viewport center in paper space
vp.CenterPoint = new Point3d(13.3056, 13.3432, 0.0);
// Set the viewport size based on scale factor
vp.Height = (overallExtents.MaxPoint.Y - overallExtents.MinPoint.Y) * scaleFactor;
vp.Width = (overallExtents.MaxPoint.X - overallExtents.MinPoint.X) * scaleFactor;
// Set the view center in model space
vp.ViewCenter = new Point2d(centerPointModelSpace.X, centerPointModelSpace.Y);
// Set the view scale (optional)
vp.CustomScale = scaleFactor;
//vp.On = true;
}
else
{
// No valid extents found
ed.WriteMessage($"\nNo valid extents found for Layer {layerNumber}. Viewport not adjusted.");
}
}
private Extents3d GetOverallExtents(Transaction tr, BlockTable bt, int layerNumber)
{
// Initialize extents
Extents3d overallExtents = new Extents3d();
// Open the Block table record Model space for read
BlockTableRecord btr = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead) as BlockTableRecord;
// Iterate through the entities in Model space
foreach (ObjectId objId in btr)
{
Entity ent = tr.GetObject(objId, OpenMode.ForRead) as Entity;
// Check if the entity is a Polyline and on the specified layer
if (ent != null && ent is Polyline && ent.Layer == $"{layerNumber}")
{
Polyline pline = (Polyline)ent;
// Get the extents of the polyline
Extents3d extents = pline.GeometricExtents;
// Extend overall extents
overallExtents.AddExtents(extents);
}
}
return overallExtents;
}
}
}
Also tried to write a second code that turns on all vp's but this also returned the same error.
