using System.Data;using System.IO;using NPOI.HSSF.UserModel;using NPOI.SS.UserModel;namespace ahwildlife.Utils{    /// <summary>    /// Excel工具类    /// 利用NPOI生成Excel    /// </summary>    public class ExcelUtil    {        #region 生成Excel        /// <summary>        /// 生成Excel        /// </summary>        public static void CreateExcel(DataTable dt, string path)        {            HSSFWorkbook workbook = new HSSFWorkbook();            ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName);//创建工作表            #region 标题            IRow row = sheet.CreateRow(0);//在工作表中添加一行            for (int i = 0; i < dt.Columns.Count; i++)            {                ICell cell = row.CreateCell(i);//在行中添加一列                cell.SetCellValue(dt.Columns[i].ColumnName);//设置列的内容                 }            #endregion            #region 填充数据            for (int i = 1; i <= dt.Rows.Count; i++)//遍历DataTable行            {                DataRow dataRow = dt.Rows[i - 1];                row = sheet.CreateRow(i);//在工作表中添加一行                for (int j = 0; j < dt.Columns.Count; j++)//遍历DataTable列                {                    ICell cell = row.CreateCell(j);//在行中添加一列                    cell.SetCellValue(dataRow[j].ToString());//设置列的内容                     }            }            #endregion            #region 输出到Excel            MemoryStream ms = new MemoryStream();            workbook.Write(ms);            using (FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write))            {                byte[] bArr = ms.ToArray();                fs.Write(bArr, 0, bArr.Length);                fs.Flush();            }            #endregion        }        #endregion    }}