excel导入 导出 兼容各个版本服务器不装EXCEL也可以

  1 首先要引用 NPOI.dll   （可在网上下载！）

  2 //导入
  3 public void OnSubmit()
  4         {
  5             string path = Server.MapPath("/upload/201410/27/201410271103461051.xls");
  6             FileStream fs = File.Open(path, FileMode.Open);
  7             System.Data.DataTable dt = ConvertToDataTable(fs);
  8             
  9             foreach (DataRow row in dt.Rows)
 10             {
 11                 if (row["Mobile1"] != null)
 12                 {
 13                     Response.Write(row["Mobile1"].ToString() + " " + row["Mobile2"].ToString() + "
 14 ");
 15                 }
 16             }
 17             Response.End();
 18         }
 19 
 20 
 21 //excel转DataTable
 22 public static DataTable ConvertToDataTable(System.IO.Stream excelFileStream)
 23         {
 24             HSSFWorkbook HSSFWorkbook = new HSSFWorkbook(excelFileStream);
 25             DataTable dt = new DataTable();
 26             HSSFSheet sheet = (HSSFSheet)HSSFWorkbook.GetSheetAt(0);
 27             System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
 28             int n = 0;
 29             while (rows.MoveNext())
 30             {
 31                 HSSFRow row = (HSSFRow)rows.Current;
 32                 if (n == 0)
 33                 {
 34                     for (int i = 0; i < row.LastCellNum; i++)
 35                     {
 36                         HSSFCell cell = (HSSFCell)row.GetCell(i);
 37                         if (cell == null)
 38                             continue;
 39                         DataColumn column = new DataColumn(cell.StringCellValue);
 40 
 41                         dt.Columns.Add(column);
 42                     }
 43                 }
 44                 else
 45                 {
 46                     DataRow dtRow = dt.NewRow();
 47                     string rValue = "";
 48                     for (int i = 0, j = 0; i < row.LastCellNum; i++)
 49                     {
 50                         HSSFCell cell = (HSSFCell)row.GetCell(i);
 51                         if (cell == null)
 52                         {
 53                             dtRow[i] = "";
 54                         }
 55                         else
 56                         {
 57                             dtRow[j] = cell.ToString();
 58                             rValue = cell.ToString();
 59                             j++;
 60                         }
 61                     }
 62                     if (string.IsNullOrEmpty(rValue.Trim()))
 63                         break;
 64                     dt.Rows.Add(dtRow);
 65                 }
 66                 n++;
 67             }
 68             return dt;
 69 
 70         }
 71  
 72 //导出
 73 /// 
 74 
 75         /// 将明细表导出到Excel
 76 
 77         /// 
 78 
 79         /// 
 80 要导入到Excel中的中文表头的Sql,将需要的字段通过sql as成中文名
 81 ///
 82 
 83 /// 1 成功 -1失败
 84 protected int ExportToExcel(string sql, HttpResponse response)
 85 {
 86 DataTable dt = CommOtherBLL.ExportToExcel(sql); //要导出的表
 87 if (dt != null && dt.Rows.Count > 0)
 88 {
 89 StringBuilder strContent = new StringBuilder();
 90 for (int i = 0; i < dt.Columns.Count; i++)
 91 strContent.Append(dt.Columns[i] + "\t");
 92 strContent.Append("\n");
 93 for (int i = 0; i < dt.Rows.Count; i++)
 94 {
 95 for (int y = 0; y < dt.Columns.Count; y++)
 96 strContent.Append(dt.Rows[i][y] + "\t");
 97 strContent.Append("\n");
 98 }
 99 response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode("excel", System.Text.Encoding.UTF8) + ".xls");
100 response.ContentType = "application/ms-excel";
101 response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
102 response.Write(strContent.ToString());
103 response.End();
104 return 1;
105 }
106 else
107 return -1;
108 }