topic Re: Get XRef Rotation .NET in .NET Forum

Get XRef Rotation .NET

Anonymous — Mon, 18 Apr 2016 21:34:42 GMT

I am new to the AutoCAD API and I am wondering how to find the rotation of an Xref? This is what I have so far.

Document acadDoc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;

Database docDB = acadDoc.Database;

Editor ed;

docDB = acadDoc.Database;

ed = acadDoc.Editor;

using (Transaction tr = docDB.TransactionManager.StartTransaction())

{

BlockTable blkTbl = (BlockTable)docDB.BlockTableId.GetObject(OpenMode.ForRead);

foreach (ObjectId id in blkTbl)

{

BlockTableRecord blkTblRcd = (BlockTableRecord)id.GetObject(OpenMode.ForRead);

if (blkTblRcd.Name == cmbxDrawingTitle.Text)

{

blkTblRcd.Rotation; ?????

}

Thanks,

Gerald

Re: Get XRef Rotation .NET

jabowabo — Tue, 19 Apr 2016 02:28:44 GMT

A block table record is like a definition of an xref (or block). A block reference is what gets inserted into model/paper space. So you can have multiple references to a single btr - just like blocks. You can find the block references a few ways. One is to use btr.GetBlockReferenceIds As shown here:
http://adndevblog.typepad.com/autocad/2012/06/identify-the-number-of-reference-to-a-block.html
One the reference (or references) is found you can use br.Rotation.

Re: Get XRef Rotation .NET

_Tharwat — Tue, 19 Apr 2016 05:05:30 GMT

Hi,

The rotation property can not be found in BlockTableRecord but in BlockReference.

Try this:

        static public void XrefBlock()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;
            TypedValue[] tv = { new TypedValue(0, "INSERT") };
            PromptSelectionResult sel = ed.SelectAll(new SelectionFilter(tv));
            if (sel.Status == PromptStatus.OK)
                using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                foreach (ObjectId id in sel.Value.GetObjectIds())
                {
                    BlockReference rf = (BlockReference)tr.GetObject(id,OpenMode.ForRead);
                    BlockTableRecord xref = (BlockTableRecord)tr.GetObject(rf.BlockTableRecord, OpenMode.ForRead);
                 if (xref.IsFromExternalReference)
                    {
                        ed.WriteMessage("\nName of Xref: <" + xref.Name + ">. Rotation angle is: <" + Math.Round(rf.Rotation, 4) + ">.");
                    }                    
                }
                tr.Commit();
            }
        }

Re: Get XRef Rotation .NET

Anonymous — Tue, 19 Apr 2016 14:48:45 GMT

_Tharwat in your example it looks like you are using a selection set, and that is throwing me off.

What I have is a combobox listing the attached xrefs, and when the user selects the item from the combobox, I need to get some information from the selected xref.

Can you point out to me where I am going wrong?

        private void cmbxDrawingTitle_SelectedIndexChanged(object sender, EventArgs e)
        {
            Document acadDoc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database docDB = acadDoc.Database;
            Editor ed;

            docDB = acadDoc.Database;
            ed = acadDoc.Editor;

            using (Transaction tr = docDB.TransactionManager.StartTransaction())
            {
	        // Get the Block Table
                BlockTable blkTbl = (BlockTable)docDB.BlockTableId.GetObject(OpenMode.ForRead);
                
		// loop through the Block Table
                foreach (ObjectId id in blkTbl)
                {
                    BlockReference rf = (BlockReference)tr.GetObject(id, OpenMode.ForRead);

                    BlockTableRecord xref = (BlockTableRecord)tr.GetObject(rf.BlockTableRecord, OpenMode.ForRead);
                    if (xref.IsFromExternalReference)
                    {
                        ed.WriteMessage("\nName of Xref: <" + xref.Name + ">. Rotation angle is: <" + Math.Round(rf.Rotation, 4) + ">.");
                    }                                       
                }
            }
        }

Thanks,

Gerald

Re: Get XRef Rotation .NET

_Tharwat — Tue, 19 Apr 2016 16:08:25 GMT

Do yo have the names of Xref blocks in combobox ?

How did you retrieved them ? by iterating through Block Table or by select all method ?

Are you sure that the names in the combobox that representing the Xrefs are existed into your drawing?

Re: Get XRef Rotation .NET

Anonymous — Tue, 19 Apr 2016 16:20:59 GMT

_Tharwat,

Here is a pic of of the combobox and the xref manager. As you can see the they both show the same thing.

and here is the code that I used to populate the combobox.

        private void Form1_Load(object sender, EventArgs e)
        {
            Document acadDoc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database docDB = acadDoc.Database;
            Editor ed;

            docDB = acadDoc.Database;
            ed = acadDoc.Editor;  

            using (Transaction tr = docDB.TransactionManager.StartTransaction())
            {
                BlockTable blkTbl = (BlockTable)docDB.BlockTableId.GetObject(OpenMode.ForRead);

                foreach (ObjectId id in blkTbl)
                {
                    BlockTableRecord blkTblRcd = (BlockTableRecord)id.GetObject(OpenMode.ForRead);
                    if (blkTblRcd.IsFromExternalReference)
                    {
                        //blkTblRcd.UpgradeOpen();
                        cmbxDrawingTitle.Items.Add(blkTblRcd.Name.ToString());
                    }  
                }
            }
        }

Thanks,

Gerald

Re: Get XRef Rotation .NET

_Tharwat — Tue, 19 Apr 2016 16:52:20 GMT

have a play with this:

            Document doc = App.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;
            TypedValue[] tv = { new TypedValue(0, "INSERT"), new TypedValue(2, cmbxDrawingTitle.SelectedItem.ToString()) };
            PromptSelectionResult sel = ed.SelectAll(new SelectionFilter(tv));
            if (sel.Status == PromptStatus.OK)
                using (Transaction tr = db.TransactionManager.StartTransaction())
                {
                    foreach (ObjectId id in sel.Value.GetObjectIds())
                    {
                        BlockReference rf = (BlockReference)tr.GetObject(id, OpenMode.ForRead);
                        BlockTableRecord xref = (BlockTableRecord)tr.GetObject(rf.BlockTableRecord, OpenMode.ForRead);
                        if (xref.IsFromExternalReference)
                        {
                            MessageBox.Show("\nName of Xref: <" + xref.Name + ">. Rotation angle is: <" + Math.Round(rf.Rotation, 4) + ">.");
                        }
                    }
                    tr.Commit();
                }

Re: Get XRef Rotation .NET

Anonymous — Tue, 19 Apr 2016 17:32:50 GMT

_Tharwat,

That did the trick, but what is the purpose of using the TypedValue and what benifit does the TypedValue bring to the table?

Thanks,

Gerald

Re: Get XRef Rotation .NET

_Tharwat — Tue, 19 Apr 2016 17:43:56 GMT

@Anonymous wrote:

_Tharwat,

That did the trick, but what is the purpose of using the TypedValue and what benifit does the TypedValue bring to the table?

Thanks,

Gerald

The TypedValue is to create a Selection Filter. HIT THIS LINK

Re: Get XRef Rotation .NET

Anonymous — Tue, 19 Apr 2016 18:24:22 GMT

Thanks for all the help _Tharwat it is much appreciated.

Gerald

Re: Get XRef Rotation .NET

_Tharwat — Tue, 19 Apr 2016 18:29:50 GMT

You are most welcome and I am happy to help.