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AutoCAD eNotOpenForWrite

I am programming an AutoCAD plugin in C # .NET. I need to install Table.IsReadEnabled

and Table.IsWriteEnabled

on true

. I have a method called addRow()

shown here:

public void addRow(String[] data)
        {
            OpenCloseTransaction tr = doc.TransactionManager.StartOpenCloseTransaction();
            DocumentLock docLock = doc.LockDocument();
            using (tr)
            using (docLock)
            {
                bool isRead = IsReadEnabled;
                bool isWrite = IsWriteEnabled;

                BlockTable bt = (BlockTable)tr.GetObject(doc.Database.BlockTableId, OpenMode.ForRead);
                BlockTableRecord btr = (BlockTableRecord)tr.GetObject(bt[Autodesk.AutoCAD.DatabaseServices.BlockTableRecord.ModelSpace], OpenMode.ForWrite);

                selectedRow++; //Sets the lowest empty row as the one to be modified

                //Adding data to each cell
                for (int i = 0; i < data.Length; i++)
                {
                    Cells[selectedRow, i].SetValue(data[i], ParseOption.SetDefaultFormat);
                }
                GenerateLayout();

                //Attempting to update database with new data

                btr.AppendEntity(this);
                tr.AddNewlyCreatedDBObject(this, true);

                tr.Commit();

            }
        }

The first time it adds data to my table, it works fine, but the call tr.Commit

sets the table IsReadEnabled

and IsWriteEnabled

to false even on a transaction OpenClose

. This causes AutoCAD to crash when trying to add a new data table to the table. I need to either re-enable writing and reading after the call tr.Commit

, or configure it so that writing and reading are never disabled.

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4 answers 


if (!IsWriteEnabled || !IsReadEnabled) //Committing transactions closes everything for reading and writing so it must be reopened
{
    tr.GetObject(this.ObjectId, OpenMode.ForRead);
    tr.GetObject(this.ObjectId, OpenMode.ForWrite);
}


I just needed to add an if statement!

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I think you should use StartTransaction

instead StartOpenCloseTransaction

. See the attached blog.

Cheers, Alain



http://spiderinnet1.typepad.com/blog/2012/08/autocad-net-openclosetransaction-can-it-be-nested.html

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Most likely, this error occurs when the previous transaction is not configured correctly. The "addRow" function from the question is an example of how not to code. Always use the C # "using" statement to start a transaction. It ensures that the transaction works properly. Review and fix all the places in the code where you start a transaction.

using(OpenCloseTransaction tr = doc.TransactionManager.StartOpenCloseTransaction())
{
   // your logic here
}
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Use try catch to get the exact exception. There is also no transaction.

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