c#中如何将excel数据转化为datatable

发布网友发布时间：2022-04-09 22:18

共3个回答

懂视网时间：2022-04-10 02:39

前台相关：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
 <title>上传数据</title>
 <script src="../../../res/js/jquery.js" type="text/javascript"></script>
 <script type="text/javascript">
 $(document).ready(function () {

  //上传按钮对文件格式进行判断
  $(‘#Button_up‘).click(function () {
  var filename = $(‘#FileUpload1‘).val();
  if (filename == ‘‘) {
   alert(‘请上传文件‘);
   return false;
  }
  else {
   var exec = (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename.toLowerCase()) : ‘‘;
   if (!(exec == "xlsx" || exec == "xls")) {
   alert(‘文件格式不正确，请上传excel文件！‘);
   return false;
   }
  }
  return true;
  });
 });
 </script>
</head>
<body>
 <form id="form1" runat="server">
 
 <div style="height:50px;line-height:50px;text-align:center;">
 <asp:FileUpload ID="FileUpload1" runat="server" Height="25px"/>
 <asp:Button ID="Button_up" runat="server" Text="上 传" OnClick="ButtonUpClick" Height="25px" />
 </div>
 </form>
</body>
</html>

后台

using System.Data;
using System.IO;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.UserModel;
using System.Data.SqlClient;
using Maticsoft.DBUtility;

 /// <summary>
 /// 将EXCEL文件上传到服务器，并插入数据库
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void ButtonUpClick(object sender, EventArgs e) 
 {
  int id = ConvertHelper.Cint0(hidId.Text);
  if (id == 0) 
  {
  try
  {
   #region 后台对文件格式进行校验
   var filename = this.FileUpload1.FileName;
   if (string.IsNullOrEmpty(filename))
   {
   FineUI.Alert.ShowInParent("请选择上传的文件！", FineUI.MessageBoxIcon.Warning);
   return;
   }
   if (!(filename.IndexOf(".xls") > 0 || filename.IndexOf(".xlsx") > 0))
   {
   FineUI.Alert.ShowInParent("文件格式有误，请上传EXCEL文件", FineUI.MessageBoxIcon.Warning);
   return;
   }
   #endregion

   //上传路径
   string path = Server.MapPath("~/") + "WebManage\BaseTotalWeb\UploadWeb\FileTmp\";

   //将文件保存到临时路径下
   string timeStamp = System.DateTime.Now.ToString("yyyyMMddHHmmssfff");
   string retStr = UpLoadFiles.FileUpload(path, this.FileUpload1, timeStamp);
   if (retStr.Equals("上传失败"))
   {
   FineUI.Alert.ShowInParent("服务忙，请稍后重试", FineUI.MessageBoxIcon.Warning);
   return;
   }

   //获取DataTable
   DataTable dt = this.ExcelToDataTable(path + timeStamp + this.FileUpload1.FileName, true);

   //删除该临时文件
   DirFileHelper.DeleteFile(path + timeStamp + this.FileUpload1.FileName);

   if (dt == null)
   {
   FineUI.Alert.ShowInParent("无法获取文件内容", FineUI.MessageBoxIcon.Error);
   return;
   }

   //上传订单号
   DateTime dtime = System.DateTime.Now;
   string strno ="up"+ BaseTotalBll.GetInstence().NextCheckCard(dtime);

   #region 添加相应的列
   //添加一列upOrderNum 并赋值
   DataColumn dc = new DataColumn("upOrderNum", typeof(string));
   dc.DefaultValue = strno;
   dt.Columns.Add(dc);

   //添加upMan 上传人
   DataColumn dcUpMan = new DataColumn("upMan", typeof(string));
   dcUpMan.DefaultValue = OnlineUsersBll.GetInstence().GetOnlineUsersModel().Manager_LoginName;//获取系统当前用户名
   dt.Columns.Add(dcUpMan);

   //添加isOk 是否使用
   DataColumn dcisOk = new DataColumn("isOk", typeof(int));
   dcisOk.DefaultValue =0;
   dt.Columns.Add(dcisOk);

   //添加cardType 卡类型 0 为设定 1 1年卡 2、2年卡 3、3年卡
   DataColumn dccardType = new DataColumn("cardType", typeof(int));
   dccardType.DefaultValue = 0;
   dt.Columns.Add(dccardType);

   //添加isBegin是否激活
   DataColumn dcisBegin = new DataColumn("isBegin", typeof(int));
   dcisBegin.DefaultValue = 0;
   dt.Columns.Add(dcisBegin);

   //添加isDown 是否导出
   DataColumn dcisDown = new DataColumn("isDown", typeof(int));
   dcisDown.DefaultValue = 0;
   dt.Columns.Add(dcisDown);

   //添加isDel 是否删除
   DataColumn dcisDel = new DataColumn("isDel",typeof(int));
   dcisDel.DefaultValue = 0;
   dt.Columns.Add(dcisDel);

   //添加上传人createMan
   DataColumn dccreateMan = new DataColumn("createMan",typeof(string));
   dccreateMan.DefaultValue = OnlineUsersBll.GetInstence().GetOnlineUsersModel().Manager_LoginName;
   dt.Columns.Add(dccreateMan);
   #endregion
   
   SqlTransaction tran = null;
   using (SqlConnection conn = new SqlConnection(DbHelperSQL.connectionString))
   {
   conn.Open();//打开链接 
   using (tran = conn.BeginTransaction())
   {
    using (SqlBulkCopy copy = new SqlBulkCopy(conn, SqlBulkCopyOptions.KeepIdentity, tran))
    {
    copy.BulkCopyTimeout = 60;
    copy.BatchSize = dt.Rows.Count;
    copy.DestinationTableName = "SLWIFI.dbo.[T_Base_CardList]";

    copy.ColumnMappings.Add("upOrderNum", "upOrderNum");
    copy.ColumnMappings.Add("ICCID号", "cardCTCC");
    copy.ColumnMappings.Add("接入号码", "cardAccess");
    copy.ColumnMappings.Add("upMan", "upMan");
    copy.ColumnMappings.Add("isOk", "isOk");
    copy.ColumnMappings.Add("cardType", "cardType");
    copy.ColumnMappings.Add("isBegin", "isBegin");
    copy.ColumnMappings.Add("isDown", "isDown");
    copy.ColumnMappings.Add("isDel", "isDel");
    copy.ColumnMappings.Add("createMan", "createMan");

    copy.WriteToServer(dt);
    tran.Commit();
    copy.Close();
    }
   }
   conn.Close();
   }

  }
  catch (Exception ex)
  {
   string str = ex.ToString();
   FineUI.Alert.ShowInParent("上传失败", FineUI.MessageBoxIcon.Error);
   return;
  }
  FineUI.Alert.ShowInParent("上传成功", FineUI.MessageBoxIcon.Information);
  return;
  }
 }
 
 /// <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;
  }
 }

用NOPI将上传的EXCEL，转换得到DataTable，用SqlBulkCopy将数据写入数据库表中,配置添加默认列及值，对应数据库字段写入数据

标签：class jquer summary creat stc head ice text 相关

热心网友时间：2022-04-09 23:47

关于C#导出excel数据到datatable的方法可以借鉴Spire的方法，如下：

//创建Workbook对象并加载Excel文档

Workbook workbook = new Workbook();

workbook.LoadFromFile(@"F:\ExportData.xlsx" , ExcelVersion.Version2013);

//获取第一张sheet

Worksheet sheet = workbook.Worksheets[0];

//设置range范围

CellRange range = sheet.Range[sheet.FirstRow, sheet.FirstColumn, sheet.LastRow, sheet.LastColumn];

//输出数据, 同时输出列名以及公式值

DataTable dt = sheet.ExportDataTable(range, true, true);

同理，也可以将datatable中的数据导入excel，如：

//创建一个workbook对象，默认创建03版的Excel

Workbook workbook = new Workbook();

//指定版本信息，07及以上版本最多可以插入1048576行数据

workbook.Version = ExcelVersion.Version2013;

//获取第一张sheet

Worksheet sheet = workbook.Worksheets[0];

//得到在datatable里的数据

DataTable dt = GetDataTable();

//从第一行第一列开始插入数据，true代表数据包含列名

sheet.InsertDataTable(dt, true, 1, 1);

//保存文件

workbook.SaveToFile("ExportDataToExcel.xlsx",ExcelVersion.Version2013);

注：程序环境中需引用spire.xls.dll。以上代码参考自原文。

热心网友时间：2022-04-10 01:05

使用NOPI.dll操作Excel就可以读出你想要的结果DataTable