C#利用NPOI导出Excel类(简单版)

代码：

using System.Data;
 System.IO;
 NPOI.hssf.usermodel;
 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>
        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
            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

                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());                }
            }
            #region 输出到Excel
            MemoryStream ms =  MemoryStream();
            workbook.Write(ms);

            using (FileStream fs =  FileStream(path,FileMode.Create,FileAccess.Write))
            {
                byte[] bArr = ms.ToArray();
                fs.Write(bArr,0,bArr.Length);
                fs.Flush();
            }
            #endregion

        }
        

    }
}

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