Excel Action Result

ExcelFileResult.cs

public class ExcelFileResult<T> : ActionResult
{
    private readonly IEnumerable<T> _records;

    public ExcelFileResult(IEnumerable<T> records)
    {
        _records = records;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        using (var pck = new ExcelPackage())
        {
            var ws = pck.Workbook.Worksheets.Add(WorksheetName);

            if (ColumnDefinitions == null)
            {
                ws.Cells["A1"].LoadFromCollection(_records, true, TableStyles.None);
            }
            else
            {
                ws.Cells["A1"].LoadFromCollection(_records, true, TableStyles.None, BindingFlags.Default, ColumnDefinitions.Select(x => x.MemberInfo).ToArray());
                Format(ws, ColumnDefinitions);
            }

            const string contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            var fileContentResult = new FileContentResult(pck.GetAsByteArray(), contentType) { FileDownloadName = FileDownloadName };
            fileContentResult.ExecuteResult(context);
        }
    }

    private static void Format(ExcelWorksheet worksheet, IList<ExcelColumnDefinition> columnDefinitions)
    {
        worksheet.Row(1).Style.Font.Bold = true;
        for (var columnIndex = 1; columnIndex <= columnDefinitions.Count; columnIndex++)
        {
            var columnDefinitionIndex = columnIndex - 1;
            if (columnDefinitions[columnDefinitionIndex].Format != null)
            {
                worksheet.Column(columnIndex).Style.Numberformat.Format = columnDefinitions[columnDefinitionIndex].Format;
            }
            if (columnDefinitions[columnDefinitionIndex].Header != null)
            {
                worksheet.Cells[1, columnIndex].Value = columnDefinitions[columnDefinitionIndex].Header;
            }
            worksheet.Column(columnIndex).AutoFit();
        }
    }

    public ExcelColumnDefinition[] ColumnDefinitions { get; set; }

    private string _downloadName;
    public string FileDownloadName
    {
        get { return _downloadName ?? "ExcelFile"; }
        set { _downloadName = value; }
    }

    private string _worksheetName;
    public string WorksheetName
    {
        get { return _worksheetName ?? "Sheet1"; }
        set { _worksheetName = value; }
    }
}

This code would be great if you had a working sample of all of it together in a zip file format. I can't open a gz file on my locked down system and I have a bunch of red squiggly lines in the code.