datatable转到Excel

 public static void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName)

        {

            if (tmpDataTable == null )

                return;

            int rowNum = tmpDataTable.Rows.Count;

            int columnNum = tmpDataTable.Columns.Count;

            int rowIndex = 1;

            int columnIndex = 0;



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

            xlApp.DefaultFilePath = "";

            xlApp.DisplayAlerts = true;

            xlApp.SheetsInNewWorkbook = 1;

            Workbook xlBook = xlApp.Workbooks.Add(true );



            //将DataTable的列名导入Excel表第一行

            foreach (DataColumn dc in tmpDataTable.Columns)

            {

                columnIndex++;

                xlApp.Cells[rowIndex, columnIndex] = dc.ColumnName;

            }



            //将DataTable中的数据导入Excel中

            for (int i = 0; i < rowNum; i++)

            {

                rowIndex++;

                columnIndex = 0;

                for (int j = 0; j < columnNum; j++)

                {

                    columnIndex++;

                    xlApp.Cells[rowIndex, columnIndex] = tmpDataTable.Rows[i][j].ToString();

                }

            }

            //xlBook.SaveCopyAs(HttpUtility.UrlDecode(strFileName, System.Text.Encoding.UTF8));

            //xlBook.SaveCopyAs(strFileName);

        }