ASP.NET实现上传Excel功能

这几天正好用到上传Excel,并根据Excel中的数据做相应的处理,故整理以备用。

用到的资源:

(1)NOPI 2.2.0.0 可自己官网下载,也可点击:http://pan.baidu.com/s/1b1EMdg

(2)用到一些常见处理文件的公共方法类,可以添加到项目中:http://pan.baidu.com/s/1bJpHuQ

如过上述连接因故无法使用,可在评论留下邮箱,我打包发送过去,如有更好的建议,欢迎指导。

后台的提示方法ShowMsgHelper,根据自己的改写即可。

前台代码:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
 <title>导入EXCEL,生成DataTable</title>
 <script src="../../Themes/Scripts/jquery-1.8.2.min.js"></script>
 <link href="/Themes/Styles/Site.css" rel="external nofollow" rel="stylesheet" type="text/css" />
 <script src="/Themes/Scripts/FunctionJS.js" type="text/javascript"></script>
 
 <script type="text/javascript">
 $(document).ready(function () {
  $("#Import").click(function () {
  var filename = $("#FileUpload1").val();
  if (filename == '') {
   alert('请选择上传的EXCEL文件');
   return false;
  }
  else {
   var exec = (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename.toLowerCase()) : '';
   if (!(exec == "xlsx" || exec == "xls")) {
   alert("文件格式不对,请上传Excel文件!");
   return false;
   }
  }
  return true;
  });
 });
 </script>
</head>
<body>
 <form id="form1" runat="server">
 <div>
 <asp:FileUpload ID="FileUpload1" runat="server" /><asp:Button ID="Import" runat="server" Text="导入" OnClick="ImpClick" />
 </div>
 </form>
</body>
</html>

后台代码;

protected void ImpClick(object sender, EventArgs e)
 {
  try
  {
  #region 校验
  var fileName = this.FileUpload1.FileName;
  if (string.IsNullOrWhiteSpace(fileName))
  {
   //提示信息
   ShowMsgHelper.Alert("请选择上传Excel文件");
   return;
  }
  //获取上传文件扩展名称
  if (!(fileName.IndexOf(".xlsx") > 0 || fileName.IndexOf(".xls") > 0))
  {
   ShowMsgHelper.Alert("上传文件格式不正确,请核对!");
   return;
  }
  #endregion
  #region 将Excel文件上传到服务器上临时文件夹中
  //临时文件夹,根目录下/Upload/tmp/,根据自己配置选择
  string path = Server.MapPath("~/") + "Upload\\tmp\\";
  string retStr=UploadHelper.FileUpload(path, this.FileUpload1);
  if (!retStr.Equals("上传成功")) {
   ShowMsgHelper.Alert(retStr);
   return;
  }
  #endregion
  #region 读取Excel文件第一个表获取内容并转换成DataTable,删除临时文件,也可以自己加时间戳,维护处理
  DataTable dt = this.ExcelToDataTable(path + this.FileUpload1.FileName, true);
  if (dt == null) {
   ShowMsgHelper.Alert_Error("获取失败");
   return;
  }
  //示例:获取dt中的值
  string test = dt.Rows[0]["name"].ToString();
  string test2 = dt.Rows[1]["class"].ToString();
  //删除临时文件
  DirFileHelper.DeleteFile("Upload\\tmp\\" + fileName);
  #endregion 
  }
  catch (Exception ex) {
  throw ex;
  }
 }
 /// <summary>
 /// 将excel导入到datatable
 /// </summary>
 /// <param name="filePath">excel路径</param>
 /// <param name="isColumnName">第一行是否是列名</param>
 /// <returns>返回datatable</returns>
 public DataTable ExcelToDataTable(string filePath, bool isColumnName)
 {
  DataTable dataTable = null;
  FileStream fs = null;
  DataColumn column = null;
  DataRow dataRow = null;
  IWorkbook workbook = null;
  ISheet sheet = null;
  IRow row = null;
  ICell cell = null;
  int startRow = 0;
  try
  {
  using (fs = File.OpenRead(filePath))
  {
   // 2007版本
   if (filePath.IndexOf(".xlsx") > 0)
   workbook = new XSSFWorkbook(fs);
   // 2003版本
   else if (filePath.IndexOf(".xls") > 0)
   workbook = new HSSFWorkbook(fs);
   if (workbook != null)
   {
   sheet = workbook.GetSheetAt(0);//读取第一个sheet,当然也可以循环读取每个sheet
   dataTable = new DataTable();
   if (sheet != null)
   {
    int rowCount = sheet.LastRowNum;//总行数
    if (rowCount > 0)
    {
    IRow firstRow = sheet.GetRow(0);//第一行
    int cellCount = firstRow.LastCellNum;//列数

    //构建datatable的列
    if (isColumnName)
    {
     startRow = 1;//如果第一行是列名,则从第二行开始读取
     for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
     {
     cell = firstRow.GetCell(i);
     if (cell != null)
     {
      if (cell.StringCellValue != null)
      {
      column = new DataColumn(cell.StringCellValue);
      dataTable.Columns.Add(column);
      }
     }
     }
    }
    else
    {
     for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
     {
     column = new DataColumn("column" + (i + 1));
     dataTable.Columns.Add(column);
     }
    }
    //填充行
    for (int i = startRow; i <= rowCount; ++i)
    {
     row = sheet.GetRow(i);
     if (row == null) continue;

     dataRow = dataTable.NewRow();
     for (int j = row.FirstCellNum; j < cellCount; ++j)
     {
     cell = row.GetCell(j);
     if (cell == null)
     {
      dataRow[j] = "";
     }
     else
     {
      //CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
      switch (cell.CellType)
      {
      case CellType.Blank:
       dataRow[j] = "";
       break;
      case CellType.Numeric:
       short format = cell.CellStyle.DataFormat;
       //对时间格式(2015.12.5、2015/12/5、2015-12-5等)的处理
       if (format == 14 || format == 31 || format == 57 || format == 58)
dataRow[j] = cell.DateCellValue;
else       dataRow[j] = cell.NumericCellValue;
break;
      case CellType.String:
dataRow[j] = cell.StringCellValue;
break;
      }
     }
     }
     dataTable.Rows.Add(dataRow);
    }
    }
   }
   }
  }
  return dataTable;
  }
  catch (Exception)
  {
  if (fs != null)
  {
   fs.Close();
  }
  return null;
  }
 }

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