topic Re: i want to create a viewport in a layout, but the code generate a importdll e in .NET Forum

i want to create a viewport in a layout, but the code generate a importdll error

swaywood — Sat, 08 Mar 2014 02:40:13 GMT

i want to create a viewport in a layout, and i get some code from kean's blog, but the code generate a importdll error, please help me!

the system is Win7x64bit+AutoCAD2013

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.EditorInput;
using AcGi = Autodesk.AutoCAD.GraphicsInterface;

namespace sample
{
public class paperViewport
{

[DllImport("acad.exe", CallingConvention = CallingConvention.Cdecl,
EntryPoint = "?acedSetCurrentVPort@@YA?AW4ErrorStatus@Acad@@PBVAcDbViewport@@@Z")]
extern static private int acedSetCurrentVPort(IntPtr AcDbVport);

[CommandMethod("CreateFloatingViewport")]
public static void CreateFloatingViewport()
{
// Get the current document and database, and start a transaction
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;

using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable;

// Open the Block table record Paper space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.PaperSpace],
OpenMode.ForWrite) as BlockTableRecord;

// Switch to the previous Paper space layout
Application.SetSystemVariable("TILEMODE", 0);
acDoc.Editor.SwitchToPaperSpace();

// Create a Viewport
Viewport acVport = new Viewport();
acVport.CenterPoint = new Point3d(3.25, 3, 0);
acVport.Width = 6;
acVport.Height = 5;

// Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(acVport);
acTrans.AddNewlyCreatedDBObject(acVport, true);

// Change the view direction
acVport.ViewDirection = new Vector3d(1, 1, 1);

// Enable the viewport
acVport.On = true;

// Activate model space in the viewport
acDoc.Editor.SwitchToModelSpace();

// Set the new viewport current via an imported ObjectARX function

//error message:Unable to find an entry point named '?' in DLL 'acad.exe'.
acedSetCurrentVPort(acVport.UnmanagedObject);

// Save the new objects to the database
acTrans.Commit();
}
}

}

Re: i want to create a viewport in a layout, but the code generate a importdll e

jeff — Sat, 08 Mar 2014 03:49:42 GMT

Need to use exported names from 2013 and that function moved from acad.exe to accore.dll in 2013

Link for getting exported names

http://www.theswamp.org/index.php?topic=41527.msg499429#msg499429

And when need to change values to ones in red below

[DllImport("accore.dll", CallingConvention = CallingConvention.Cdecl,
EntryPoint = "?acedSetCurrentVPort@@YA?AW4ErrorStatus@Acad@@PEBVAcDbViewport@@@Z")]

Re: i want to create a viewport in a layout, but the code generate a importdll e

swaywood — Sat, 08 Mar 2014 06:00:28 GMT

thanks a lot jeff. but how did you know this? and where are you learn from this knowlage point?

Re: i want to create a viewport in a layout, but the code generate a importdll e

jeff — Sat, 08 Mar 2014 06:24:04 GMT

Just google "name mangling" or "name decoration"

Also extern and __declspec for not being managled.

Re: i want to create a viewport in a layout, but the code generate a importdll e

swaywood — Sat, 08 Mar 2014 07:16:02 GMT

i registed yesterday but still not approved by TheSwamp.

Re: i want to create a viewport in a layout, but the code generate a importdll e

jeff — Sat, 08 Mar 2014 07:20:10 GMT

Will send mods a message that swaywood is trying join.

Did you use swaywood as user name?

Re: i want to create a viewport in a layout, but the code generate a importdll e

swaywood — Sat, 08 Mar 2014 07:29:13 GMT

yes
it is swaywood
thanks

Re: i want to create a viewport in a layout, but the code generate a importdll e

Hallex — Sat, 08 Mar 2014 07:43:15 GMT

I have no luck with this code snippet on my A2014

but the follwing code does the job

Command only works in paperspace!

   

        //	http://adndevblog.typepad.com/autocad/2012/08/create-paper-space-viewports.html
        [CommandMethod("VW")]
        public void tryCreateViewPort()
        {
            // Only works in paperspace
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            Database db = doc.Database;
            
            try
            {
                using (Transaction tr = db.TransactionManager.StartTransaction())
                {
                   // ed.SwitchToPaperSpace();
                    ObjectId mCurViewportId = ed.ActiveViewportId;

                    if (mCurViewportId == ObjectId.Null)
                    {
                        ed.WriteMessage("\nCommand only works in paperspace.");

                        return;

                    }

                    Viewport pCurViewport = tr.GetObject(mCurViewportId, OpenMode.ForRead) as Viewport;

                    if (pCurViewport == null)
                    {

                        ed.WriteMessage("\nCannot get active viewport.");

                        return;

                    }

                    if (pCurViewport.Number != 1)
                    {

                        ed.WriteMessage("\nCommand only works in paperspace.");

                        return;

                    }

                    // Ask for the position

                    Point3d pt1; Point3d pt2;

                    pt1 = ed.GetPoint("\nSelect first corner: ").Value;

                    pt2 = ed.GetCorner("\nSelect second corner: ", pt1).Value;

                    // Ask for the view to use

                    string mViewName;

                    mViewName = ed.GetString("\nEnter name of view to use: ").StringResult;

                    // Create new viewport

                    Viewport pViewport = new Viewport();

                    pViewport.Width = Math.Abs(pt2.X - pt1.X);

                    pViewport.Height = Math.Abs(pt2.Y - pt1.Y);

                    pViewport.CenterPoint = new Point3d(

                      pt1.X + (pt2.X - pt1.X) / 2,

                      pt1.Y + (pt2.Y - pt1.Y) / 2,

                      pt1.Z);

                    // Append new viewport to paper space

                    BlockTable pTable;

                    BlockTableRecord pPsBTR;

                    pTable = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
                    pPsBTR = (BlockTableRecord)tr.GetObject(pTable[BlockTableRecord.PaperSpace], OpenMode.ForWrite);

                    ObjectId mViewPortId = pPsBTR.AppendEntity(pViewport);

                    tr.AddNewlyCreatedDBObject(pViewport, true);
                    pViewport.On = true;
                    pViewport.FastZoomOn = true;

                    pViewport.SetUcs(pViewport.CenterPoint, Vector3d.XAxis, Vector3d.YAxis);


                    // Set the view



                    ViewTable pViewTable = (ViewTable)tr.GetObject(db.ViewTableId, OpenMode.ForRead);

                    // initialize the layout

                    // Autodesk.AutoCAD.ApplicationServices.Application.SetSystemVariable("TILEMODE", 0);
                    //  Layout layout = tr.GetObject(pPsBTR.LayoutId, OpenMode.ForWrite) as Layout;
                    //  LayoutManager.Current.CurrentLayout = "Layout2";
                    // layout.Initialize();

                    ViewTableRecord pViewTR;
                    if (pViewTable.Has(mViewName))
                    {
                        pViewTR = (ViewTableRecord)tr.GetObject(pViewTable[mViewName], OpenMode.ForWrite);
                    }
                    else
                    {
                        pViewTR = new ViewTableRecord();
                        pViewTR.Name = mViewName;
                        pViewTR.IsPaperspaceView = true;
                        pViewTable.UpgradeOpen();
                        ObjectId vtId = pViewTable.Add(pViewTR);

                        tr.AddNewlyCreatedDBObject(pViewTR, true);
                    }


                    ed.SetCurrentView(pViewTR);

                    tr.Commit();

                    Autodesk.AutoCAD.ApplicationServices.Application.SetSystemVariable("TILEMODE", 0);
                }
            }
            catch (Autodesk.AutoCAD.Runtime.Exception ex)
            {
                ed.WriteMessage(ex.Message + "\n" + ex.StackTrace);
            }
            finally
            {
            }
        }

Re: i want to create a viewport in a layout, but the code generate a importdll e

Hallex — Sat, 08 Mar 2014 08:30:22 GMT

Also read articles
http://adndevblog.typepad.com/autocad/2012/04/the-property-viewviewport-is-not-available-any-more-in-autocad-net-2013-api.html
http://adndevblog.typepad.com/autocad/2012/10/zooming-to-drawing-extents-for-a-viewport-without-sending-commands.html

Re: i want to create a viewport in a layout, but the code generate a importdll e

swaywood — Sat, 08 Mar 2014 13:17:50 GMT

Hi Hallex:

thanks a lot, u r so warmhearted.