asp.net上传Excel文件并读取数据的实现方法

  <form id="form1" runat="server">   <div>    <asp:FileUpload ID="ExcelFileUpload" runat="server" />    <asp:Button ID="UploadBtn" runat="server" Text="确定上传" OnClick="UploadBtn_Click" />   </div>  </form>

protected void UploadBtn_Click(object sender, EventArgs e){ if (ExcelFileUpload.HasFile == false)//HasFile用来检查FileUpload是否有文件 {  Response.Write("<script>alert('请您选择Excel文件')</script> ");  return;//当无文件时,返回 } string IsXls = Path.GetExtension(ExcelFileUpload.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名 if (IsXls != ".xlsx" && IsXls != ".xls") {  Response.Write(ExcelFileUpload.FileName);  Response.Write("<script>alert('只可以选择Excel文件')</script>");  return;//当选择的不是Excel文件时,返回 } string filename = ExcelFileUpload.FileName;//获取Execle文件名  string savePath = Server.MapPath(("UploadExcel//") + filename);//Server.MapPath 服务器上的指定虚拟路径相对应的物理文件路径 //savePath ="D:/vsproject/Projects/exceltestweb/exceltestweb/uploadfiles/test.xls" //Response.Write(savePath); DataTable ds = new DataTable(); ExcelFileUpload.SaveAs(savePath);//将文件保存到指定路径 DataTable dt = GetExcelDatatable(savePath);//读取excel数据 List<RegNumInfo> regList = ConvertDtToInfo(dt);//将datatable转为list File.Delete(savePath);//删除文件 Response.Write("<script>alert('上传文件读取数据成功！');</script>");}/// <summary>/// 从excel文件中读取数据/// </summary>/// <param name="fileUrl">实体文件的存储路径</param>/// <returns></returns>private static DataTable GetExcelDatatable(string fileUrl){ //支持.xls和.xlsx，即包括office2010等版本的;HDR=Yes代表第一行是标题，不是数据； string cmdText = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileUrl + "; Extended Properties=/"Excel 12.0;HDR=Yes/""; System.Data.DataTable dt = null; //建立连接 OleDbConnection conn = new OleDbConnection(cmdText); try {  //打开连接  if (conn.State == ConnectionState.Broken || conn.State == ConnectionState.Closed)  {   conn.Open();  }  System.Data.DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);  string strSql = "select * from [Sheet1$]"; //这里指定表明为Sheet1,如果修改过表单的名称，请使用修改后的名称  OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);  DataSet ds = new DataSet();  da.Fill(ds);  dt = ds.Tables[0]; ;  return dt; } catch (Exception exc) {  throw exc; } finally {  conn.Close();  conn.Dispose(); }}/// <summary>/// 将datatable转换为list集合/// </summary>/// <param name="dt">DataTable</param>/// <returns></returns>private static List<RegNumInfo> ConvertDtToInfo(DataTable dt){ List<RegNumInfo> list = new List<RegNumInfo>(); if (dt.Rows.Count > 0) {  foreach (DataRow item in dt.Rows)  {   RegNumInfo info = new RegNumInfo();   info.RegNum = item[0].ToString();   info.Name = item[1].ToString();   info.Period = item[2].ToString();   info.Remark = item[3].ToString();   list.Add(info);  } } return list;}

public class RegNumInfo{ public string RegNum { get; set; } public string Name { get; set; } public string Period { get; set; } public string Remark { get; set; }}