topic Re: Unable create Hacth after to Windown Form in .NET Forum

Unable create Hatch after to Windows Form

traiduong014969 — Wed, 15 Feb 2023 16:26:18 GMT

Hi all,

I Started work with Windonw Form. After create Hatch for a object. I begine make a form to seclect Hatch. However when i test code that has appear a message as picture below:

-moderator edit: corrected spelling errors in title.

So everyone can tell me how to fix that ?

Thank you !

public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void B2_Click(object sender, EventArgs e) { this.Close(); } private void label1_Click(object sender, EventArgs e) { } private void B3_Click(object sender, EventArgs e) { Document doc = AcAp.DocumentManager.MdiActiveDocument; Database db = doc.Database; string mh = B1.SelectedItem.ToString(); try { using (Transaction trans = db.TransactionManager.StartTransaction()) { BlockTable bt = trans.GetObject(doc.Database.BlockTableId, OpenMode.ForRead) as BlockTable; BlockTableRecord btr = trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; Polyline pl = new Polyline(); pl.SetDatabaseDefaults(); pl.AddVertexAt(0, new Point2d(2.0, 4.0), 0, 0, 0); pl.AddVertexAt(1, new Point2d(4.0, 2.0), 0, 0, 0); pl.AddVertexAt(2, new Point2d(6.0, 4.0), 0, 0, 0); pl.Closed = true; pl.ColorIndex = 6; // Add the polyline to the database ObjectId plineId = btr.AppendEntity(pl); trans.AddNewlyCreatedDBObject(pl, true); // Create the hatch object Hatch ht = new Hatch(); ht.SetHatchPattern(HatchPatternType.PreDefined, "mh"); ht.ColorIndex = 54; ht.BackgroundColor = Autodesk.AutoCAD.Colors.Color.FromColorIndex(ColorMethod.ByAci, 4); // Add the hatch to the database btr.AppendEntity(ht); trans.AddNewlyCreatedDBObject(ht, true); // Set the hatch boundary ht.Associative = true; ht.AppendLoop(HatchLoopTypes.Default, new ObjectIdCollection() { plineId }); ht.EvaluateHatch(true); // Add dimention AlignedDimension al = new AlignedDimension(); AlignedDimension al1 = new AlignedDimension(); AlignedDimension al2 = new AlignedDimension(); al.XLine1Point = new Point3d(2, 4, 0); al.XLine2Point = new Point3d(4, 2, 0); al.Dimscale = 0.5; al.DimensionStyle = db.Dimstyle; al1.XLine1Point = new Point3d(4, 2, 0); al1.XLine2Point = new Point3d(6, 4, 0); al1.Dimscale = 0.5; al1.DimensionStyle = db.Dimstyle; al2.XLine1Point = new Point3d(2, 4, 0); al2.XLine2Point = new Point3d(6, 4, 0); al2.Dimscale = 0.5; al2.DimensionStyle = db.Dimstyle; // Add the new object to Model space and the transaction btr.AppendEntity(al); trans.AddNewlyCreatedDBObject(al, true); btr.AppendEntity(al1); trans.AddNewlyCreatedDBObject(al1, true); btr.AppendEntity(al2); trans.AddNewlyCreatedDBObject(al2, true); trans.Commit(); } } catch (Autodesk.AutoCAD.Runtime.Exception ex) { AcAp.ShowAlertDialog("not create hatch from poplyline " + ex.Message); } } private void B1_SelectedIndexChanged(object sender, EventArgs e) { } }

Re: Unable create Hacth after to Windown Form

hippe013 — Wed, 15 Feb 2023 14:42:46 GMT

It would be helpful if you posted your code in its entirety. How are you launching your dialog? Modal? Modeless? Without seeing the rest of your code I have to just guess. At first glance the problem appears to be that you are not locking your document.

Using DocumentLock docLock = doc.LockDocument { Using Transaction trans = db.TransactionManager.StartTransaction { } }

Re: Unable create Hacth after to Windown Form

hosneyalaa — Wed, 15 Feb 2023 14:47:16 GMT

I think you are needing

a LockDocument() method.

And change

// Add the polyline to the database btr.AppendEntity(pl); trans.AddNewlyCreatedDBObject(pl, true);

And can you see this

https://forums.autodesk.com/t5/net/draw-polyline-with-hatch-getting-error-einvalidinput/m-p/9632916

Re: Unable create Hacth after to Windown Form

traiduong014969 — Wed, 15 Feb 2023 14:53:42 GMT

When i replace Text "mh" by "ANSI31" or specific name. Code woking, but i replace by a variable. It will appear a error.

Re: Unable create Hacth after to Windown Form

traiduong014969 — Wed, 15 Feb 2023 15:53:35 GMT

It's seem that has an error when i add DoccumentLock

Re: Unable create Hatch after to Windows Form

Ed__Jobe — Wed, 15 Feb 2023 16:29:18 GMT

"not create hatch from poplyline " should be "Hatch not created from polyline". Polyline only has 1 "p".

Re: Unable create Hacth after to Windown Form

hosneyalaa — Wed, 15 Feb 2023 16:36:12 GMT

What It is in the error message

add DoccumentLock

As @hippe013 write

Re: Unable create Hatch after to Windows Form

traiduong014969 — Wed, 15 Feb 2023 16:43:52 GMT

This mistake is add apostrophes into "mh"

ht.SetHatchPattern(HatchPatternType.PreDefined, "mh");

code after fixed

ht.SetHatchPattern(HatchPatternType.PreDefined, mh);