excel导入 导出 兼容各个版本服务器不装EXCEL也可以

 给出 demo源码： http://pan.baidu.com/s/1hqGMudY            提取码：pw4n
首先要引用 NPOI.dll   （可在网上下载！）
 //导入
 public void OnSubmit()
         {
             string path = Server.MapPath("/upload/201410/27/201410271103461051.xls");
             FileStream fs = File.Open(path, FileMode.Open);
             System.Data.DataTable dt = ConvertToDataTable(fs);

             foreach (DataRow row in dt.Rows)
             {
                 if (row["Mobile1"] != null)
                 {
                     Response.Write(row["Mobile1"].ToString() + " " + row["Mobile2"].ToString() + "
 ");
                 }
             }
             Response.End();
         }

 //excel转DataTable
 public static DataTable ConvertToDataTable(System.IO.Stream excelFileStream)
         {
             HSSFWorkbook HSSFWorkbook = new HSSFWorkbook(excelFileStream);
             DataTable dt = new DataTable();
             HSSFSheet sheet = (HSSFSheet)HSSFWorkbook.GetSheetAt(0);
             System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
             int n = 0;
             while (rows.MoveNext())
             {
                 HSSFRow row = (HSSFRow)rows.Current;
                 if (n == 0)
                 {
                     for (int i = 0; i < row.LastCellNum; i++)
                     {
                         HSSFCell cell = (HSSFCell)row.GetCell(i);
                         if (cell == null)
                             continue;
                         DataColumn column = new DataColumn(cell.StringCellValue);

                         dt.Columns.Add(column);
                     }
                 }
                 else
                 {
                     DataRow dtRow = dt.NewRow();
                     string rValue = "";
                     for (int i = 0, j = 0; i < row.LastCellNum; i++)
                     {
                         HSSFCell cell = (HSSFCell)row.GetCell(i);
                         if (cell == null)
                         {
                             dtRow[i] = "";
                         }
                         else
                         {
                             dtRow[j] = cell.ToString();
                             rValue = cell.ToString();
                             j++;
                         }
                     }
                     if (string.IsNullOrEmpty(rValue.Trim()))
                         break;
                     dt.Rows.Add(dtRow);
                 }
                 n++;
             }
             return dt;

         }

/// <summary>
/// Excel导出数据
/// </summary>
/// <param name="sbHtml">html标签</param>
/// <param name="fileName">文件名</param>
public static void ExportExcel(StringBuilder sbHtml, string fileName)
{
try
{
if (sbHtml.Length > 0)
{
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
HttpContext.Current.Response.Charset = "Utf-8";
//HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName + ".xls", System.Text.Encoding.UTF8));
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + ".xls" );
HttpContext.Current.Response.Write(sbHtml.ToString());
HttpContext.Current.Response.End();
}
}
catch (Exception ex)
{
Logger.WriteLog("-----------Excel导出数据异常-----------\r\n" + ex.ToString() + "\r\n");
}
}