Wie kann ich mehrfach-export dataset in eine excel-Tabelle

bevor u erstellen

1.using Excel = Microsoft.Office.Interop.Excel;//in der Kopfzeile,und Fügen Sie die richtige refference

2.Excel.Anwendung excelHandle1 = PrepareForExport(Ds); //add Griff in der aufrufenden Funktion
excelHandle1.Sichtbar = true;

 public Excel.Application PrepareForExport(System.Data.DataSet ds,string[] sheet)
    {
            object missing = System.Reflection.Missing.Value;
            Excel.Application excel = new Excel.Application();
            Excel.Workbook workbook = excel.Workbooks.Add(missing);

            DataTable dt1 = new DataTable();
            dt1 = ds.Tables[0];
            DataTable dt2 = new DataTable();
            dt2 = ds.Tables[1];


            Excel.Worksheet newWorksheet;
            newWorksheet = (Excel.Worksheet)excel.Worksheets.Add(missing, missing, missing, missing);
            newWorksheet.Name ="Name of data sheet";

// for first datatable dt1..

            int iCol1 = 0;
            foreach (DataColumn c in dt1.Columns)
            {
                iCol1++;
                excel.Cells[1, iCol1] = c.ColumnName;
            }

            int iRow1 = 0;
            foreach (DataRow r in dt1.Rows)
            {
                iRow1++;

                for (int i = 1; i < dt1.Columns.Count + 1; i++)
                {

                    if (iRow1 == 1)
                    {
                        //Add the header the first time through 
                        excel.Cells[iRow1, i] = dt1.Columns[i - 1].ColumnName;
                    }

                    excel.Cells[iRow1 + 1, i] = r[i - 1].ToString();
                }

            }

   // for  second datatable dt2..

            int iCol2 = 0;
            foreach (DataColumn c in dt2.Columns)
            {
                iCol2++;
                excel.Cells[1, iCol] = c.ColumnName;
            }


            int iRow2 = 0;
            foreach (DataRow r in dt2.Rows)
            {
                iRow2++;

                for (int i = 1; i < dt2.Columns.Count + 1; i++)
                {

                    if (iRow2 == 1)
                    {
                        //Add the header the first time through 
                        excel.Cells[iRow2, i] = dt2.Columns[i - 1].ColumnName;
                    }

                    excel.Cells[iRow2 + 1, i] = r[i - 1].ToString();
                }

            }




        return excel;
    }

ich bin mit diesem code