System.MissingMethodException

[Anonymous]

I am trying to iterate through the layer table and keep getting the following error message:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MissingMethodException: Method not found: 'Autodesk.AutoCAD.DatabaseServices.SymbolTableEnumerator Autodesk.AutoCAD.DatabaseServices.LayerTable.GetEnumerator()'.
at ClassLibrary.STCClass.test()

My code looks like this:

Database db = new Database(false, true);
db.ReadDwgFile(filename, System.IO.FileShare.None, false, null);

Transaction tr = db.TransactionManager.StartTransaction();

LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);
foreach (ObjectId objID in lt)
{
.
.
.
}

If I comment our the foreach the error goes away.

What am I doing wrong?

Thanks,
lt.Close();

tr.Commit();
db.Dispose();

[Anonymous]

You're not showing the actual code, because what you
show would fail at the call to GetObject(), because you're
not casting the result to a LayerTable.

Also, what release of AutoCAD are you using?

--
http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2008
Supporting AutoCAD 2000 through 2008
http://www.acadxtabs.com

wrote in message news:5823542@discussion.autodesk.com...
I am trying to iterate through the layer table and keep getting the following error message:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MissingMethodException: Method not found: 'Autodesk.AutoCAD.DatabaseServices.SymbolTableEnumerator Autodesk.AutoCAD.DatabaseServices.LayerTable.GetEnumerator()'.
at ClassLibrary.STCClass.test()

My code looks like this:

Database db = new Database(false, true);
db.ReadDwgFile(filename, System.IO.FileShare.None, false, null);

Transaction tr = db.TransactionManager.StartTransaction();

LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);
foreach (ObjectId objID in lt)
{
.
.
.
}

If I comment our the foreach the error goes away.

What am I doing wrong?

Thanks,
lt.Close();

tr.Commit();
db.Dispose();

[Anonymous]

Looks like a c style cast to me ??

[Anonymous]

Hi Dan, you're right, I missed it 🙂

But, there is still something fishy because it works fine here.

And that's why I don't think he's showing the actual code.

--
http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2008
Supporting AutoCAD 2000 through 2008
http://www.acadxtabs.com

wrote in message news:5823985@discussion.autodesk.com...
Looks like a c style cast to me ??

[Anonymous]

That is the actual code. I only left out the lines inside the foreach loop. Could the C-style cast be the problem?

I'm using VS 2005 and AutoCAD 2006.

Database db = new Database(false, true);
db.ReadDwgFile(filename, System.IO.FileShare.None, false, null);

Transaction tr = db.TransactionManager.StartTransaction();

LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);
foreach (ObjectId objID in lt)
{
.
.
.
}

lt.Close();

tr.Commit();
db.Dispose();

[Anonymous]

Works in AutoCAD 2007.

[Anonymous]

You are referencing wrong versions of the
managed assemblies for AutoCAD 2006.

If you're thinking that you can use the same
.NET dll in both of those releases, you can't,

--
http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2008
Supporting AutoCAD 2000 through 2008
http://www.acadxtabs.com

wrote in message news:5824195@discussion.autodesk.com...
Works in AutoCAD 2007.

[Anonymous]

No... I just need it to work in one or the other.
Thanks for the heads-up though.