OpenXML SDK Inject VBA into excel workbook

Question

I can successfully inject a piece of VBA code into a generated excel workbook, but what I am trying to do is use the Workbook_Open() event so the VBA code executes when the file

Answer 1

I found that the other answers still resulted in the duplicate "Worksheet" object. I used a similar solution to what @ZlotaMoneta said, but with a different syntax found here:

List newParts = new List();
using (var originalDocument = SpreadsheetDocument.Open("file1.xlsm"), false))
{
    newParts = originalDocument.WorkbookPart.GetPartsOfType().ToList();

    using (var document = SpreadsheetDocument.Open("file2.xlsm", true))
    {
        document.WorkbookPart.DeleteParts(document.WorkbookPart.GetPartsOfType());

        foreach (var part in newParts)
        {
            VbaProjectPart vbaProjectPart = document.WorkbookPart.AddNewPart();
            using (Stream data = part.GetStream())
            {
                vbaProjectPart.FeedData(data);
            }                    
        }

        //Note this prevents the duplicate worksheet issue
        spreadsheetDocument.WorkbookPart.Workbook.WorkbookProperties.CodeName = "ThisWorkbook";
    }
}