将多维列表插入excel工作表时出现COM异常

我试图找到一种方法，使用interop assembly将multi dimensional C# list插入excel sheet。我的列表中有几行数据，分布在8列中。但当我执行查询时，它给了我一个COM Exception from HRESULT: 0x800A03EC，我有下面的代码

public void ExportStructureListToExcel(List<StructuresDS> listExport, string sheetName)
{
    try
    {
        Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
        Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
        Microsoft.Office.Interop.Excel._Worksheet worksheet1 = null;
        worksheet1 = (Microsoft.Office.Interop.Excel._Worksheet)workbook.Sheets["Sheet1"];
        worksheet1 = (Microsoft.Office.Interop.Excel._Worksheet)workbook.ActiveSheet;
        for (int i = 1; i < listExport.Count + 1; i++)
        {
             for (int j = 1; j < 8; j++)
             {
                  worksheet1.Cells[i, j] = listExport[i - 1];
             }
        }
        string fileDestination = @"S:'Parser Project'sde.xls";
        if (File.Exists(fileDestination))
        {
             File.Delete(fileDestination);
        }
        workbook.SaveAs(fileDestination, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
        workbook.Close(true, Type.Missing, Type.Missing);
        Process.Start(fileDestination);
        app.Quit();
    }
    catch (Exception e)
    {
         MessageBox.Show(e.Message);
    }
}

结构DS结构

  public class StructuresDS
        {
            public DateTime time;
            public string CC;
            public string term;
            public string strike;
            public string strategy;
            public double? premium;
            public int volume;
            public double ratio;
            public string over;
        }
**Inserting elements to the List**

 listStructures.Add(new StructuresDS
               {
                   time = Convert.ToDateTime(AxiomSubSet[0].time.ToString("HH:mm:ss")),
                   CC = AxiomSubSet[0].CC,
                   term = listCodedTerms[0],
                   strike = (Convert.ToDouble(AxiomSubSet[0].strike) * 100).ToString(),
                   strategy = AxiomSubSet[0].strategy,
                   premium = Convert.ToDouble(AxiomSubSet[0].price),
                   volume = Convert.ToInt32(AxiomSubSet[0].quantity)
               });

在worksheet1.Cells[i, j] = listExport[i - 1];处引发错误我找不到解决这个问题的办法。我能知道我错在哪里吗？

worksheet1.Cells[i, j].Value = listExport[i - 1].over;