Fix this Error when export Excel File “Exception Details: System.Data.OleDb.OleDbException: Unexpected error from external database driver ().”

public ActionResult ExportToExcel(int MID)

{

        MModule objModule = new MModule();
        objModule.LoadModule(MID);
        DatabaseObject objData = new DatabaseObject();
        string file = DateTime.Now.Ticks + "_" + objModule.Title + ".xlsx";
        System.IO.File.Copy(Server.MapPath("/Excel/Export/Atemplate.xlsx"), Server.MapPath("/Excel/Export/" + file));
        string filename = Server.MapPath("/Excel/Export/" + file);
        objData.Query = "SELECT * FROM " + objModule.TableName + "";
        DataTable dtReport = objData.GetTable();

        System.Data.OleDb.OleDbConnection con = new System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Mode=ReadWrite;Extended Properties=\"Excel 12.0 Xml;Readonly=False;IMEX=0;\"");

        con.Open();
        System.Data.OleDb.OleDbCommand cmd = con.CreateCommand();
        string tableString = "";
        string ColString = "";
        for (int i = 0; i < dtReport.Columns.Count; i++)
        {
            tableString += "[" + dtReport.Columns[i].Caption + "] varchar(255),";
            ColString += "[" + dtReport.Columns[i].Caption + "],";

        }
        tableString = tableString.Substring(0, tableString.Length - 1);
        try
        {
            ColString = ColString.Substring(0, ColString.Length - 1);

            //***************** Create Excel Sheet Table *********************//

            cmd.CommandText = "CREATE TABLE [" + objModule.Title + "] ( " + tableString + ");";
            cmd.ExecuteNonQuery();



            string ValString = "";
            for (int j = 0; j < dtReport.Rows.Count; j++)
            {
                ValString = "";
                for (int i = 0; i < dtReport.Columns.Count; i++)
                {
                    ValString += "'" + dtReport.Rows[j][i] + "',";

                }
                ValString = ValString.Substring(0, ValString.Length - 1);
                cmd.CommandText = "Insert Into [" + objModule.Title + "] (" + ColString + ") Values (" + ValString + ");";

                cmd.ExecuteNonQuery();
            }
            cmd.Dispose();
            con.Dispose();
            con.Close();




            Microsoft.Office.Interop.Excel.Application excelApplication = new Microsoft.Office.Interop.Excel.Application();


            Microsoft.Office.Interop.Excel.Workbook workbook = excelApplication.Workbooks.Open(filename,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing);


            foreach (Excel.Worksheet wrkst1 in workbook.Worksheets)
            {

                Excel.Range usedrange = wrkst1.UsedRange;
                usedrange.Columns.AutoFit();
                wrkst1.Tab.Color = 255;


                for (int i = 0; i < dtReport.Rows.Count; i++)
                {
                    for (int j = 0; j < dtReport.Columns.Count; j++)
                    {
                        Microsoft.Office.Interop.Excel.Range range = wrkst1.Cells[i + 2, j + 1];
                        range.Interior.Color = System.Drawing.
                        ColorTranslator.ToOle(System.Drawing.Color.YellowGreen);
                    }
                }
                Excel.Range rng1 = (Excel.Range)wrkst1.Rows[1];
                rng1.Interior.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.Yellow);


                Excel.Range rng = (Excel.Range)wrkst1.Cells[1, 1];
                Excel.Range row = rng.EntireRow;
                row.Insert(Excel.XlInsertShiftDirection.xlShiftDown, false);


                Excel.Range chartRange;
                chartRange = wrkst1.get_Range("E1");
                chartRange.FormulaR1C1 = objModule.Title;
                chartRange.HorizontalAlignment = 3;
                chartRange.VerticalAlignment = 3;
                chartRange.Font.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.Green);
                chartRange.Font.Size = 20;
            }


            excelApplication.DisplayAlerts = false;
            ((Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]).Delete();
            workbook.Close(true, filename, null);
            excelApplication.DisplayAlerts = true;


        }

        catch (Exception ex)
        {
        }


        //return File(filename, "application/msexcel");
        return File(filename, "application/x-excel", DateTime.Now.Ticks + "_Report.xlsx");
    }