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C#导出导入Excel(企业库)

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

 

综合参考了网上的方法,生成Excel文件提供下载,然后删除生成的Excel文件。

1、引用Microsoft.Office.Interop.Excel;( 属性里的嵌入互操作类型改为Fasle)

2、Default10.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default10.aspx.cs" Inherits="Default10" %> <!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 runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:Button ID="ExportToExcel" runat="server" Text="导出Excel" onclick="ExportToExcel_Click" /> </div> </form> </body> </html>

3、Default10.aspx.cs

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using Excel = Microsoft.Office.Interop.Excel; //添加引用 public partial class Default10 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void ExportToExcel_Click(object sender, EventArgs e) { Excel.Application excel1 = new Excel.Application(); excel1.DisplayAlerts = false; Excel.Workbook workbook1 = excel1.Workbooks.Add(Type.Missing); excel1.Visible = false; Excel.Worksheet worksheet1 = (Excel.Worksheet)workbook1.Worksheets["sheet1"]; //表头 worksheet1.Cells[1, 1] = "姓名"; //Excel里从第1行,第1列计算 worksheet1.Cells[1, 2] = "性别"; worksheet1.Cells[1, 3] = "联系电话"; System.Data.DataTable dt = GetTestData(100); for (int i = 0; i < dt.Rows.Count; i++) { for (int j = 0; j < dt.Columns.Count; j++) worksheet1.Cells[i + 2, j + 1] = dt.Rows[i][j].ToString(); } string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls"; string filePath = Server.MapPath("~/" + fileName); workbook1.SaveAs(filePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); excel1.Workbooks.Close(); excel1.Quit(); int generation = GC.GetGeneration(excel1); System.Runtime.InteropServices.Marshal.ReleaseComObject(excel1); excel1 = null; GC.Collect(generation); //打开要下载的文件,并把该文件存放在FileStream中 System.IO.FileStream Reader = System.IO.File.OpenRead(filePath); //文件传送的剩余字节数:初始值为文件的总大小 long Length = Reader.Length; HttpContext.Current.Response.Buffer = false; HttpContext.Current.Response.AddHeader("Connection", "Keep-Alive"); HttpContext.Current.Response.ContentType = "application/octet-stream"; HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName); HttpContext.Current.Response.AddHeader("Content-Length", Length.ToString()); byte[] Buffer = new Byte[10000]; //存放欲发送数据的缓冲区 int ByteToRead; //每次实际读取的字节数 while (Length > 0) { //剩余字节数不为零,继续传送 if (Response.IsClientConnected) { //客户端浏览器还打开着,继续传送 ByteToRead = Reader.Read(Buffer, 0, 10000); //往缓冲区读入数据 HttpContext.Current.Response.OutputStream.Write(Buffer, 0, ByteToRead); //把缓冲区的数据写入客户端浏览器 HttpContext.Current.Response.Flush(); //立即写入客户端 Length -= ByteToRead; //剩余字节数减少 } else { //客户端浏览器已经断开,阻止继续循环 Length = -1; } } //关闭该文件 Reader.Close(); if (System.IO.File.Exists(filePath)) System.IO.File.Delete(filePath); } System.Data.DataTable GetTestData(int num) //测试数据 { System.Data.DataTable dt = new System.Data.DataTable(); System.Data.DataRow dr; dt.Columns.Add(new System.Data.DataColumn("ContactName", typeof(String))); dt.Columns.Add(new System.Data.DataColumn("ContactSex", typeof(String))); dt.Columns.Add(new System.Data.DataColumn("ContactPhone", typeof(String))); for (int i = 0; i < num; i++) { Random rnd = new Random(Environment.TickCount * i); dr = dt.NewRow(); dr[0] = "姓名" + rnd.Next(1, num); dr[1] = rnd.Next(1, num) < num / 2 ? "" : ""; dr[2] = rnd.Next(1000000, 99999999); dt.Rows.Add(dr); } return dt; } }

另一种利用Excel模板生成Excel方法如下:

private void ExportToExcel(DataTable dt, string fileName) { //转换为物理路径 string newFileName = HttpContext.Current.Server.MapPath("~/" + fileName); //根据模板正式生成该Excel文件 File.Copy(HttpContext.Current.Server.MapPath("~/ContactTemplate.xls"), newFileName, true); //建立指向该Excel文件的数据库连接 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + newFileName + ";Extended Properties='Excel 8.0;HDR=yes;IMEX=2'"; OleDbConnection Conn = new OleDbConnection(strConn); //打开连接,为操作该文件做准备 Conn.Open(); OleDbCommand Cmd = new OleDbCommand("", Conn); foreach (DataRow DR in dt.Rows) { string XSqlString = "insert into [Sheet1$]"; XSqlString += "([姓名],[性别],[联系电话]) values("; XSqlString += "'" + DR["ContactName"] + "',"; XSqlString += "'" + (DR["ContactSex"].ToString() == "1" ? "" : "") + "',"; XSqlString += "'" + DR["ContactPhone"] + "')"; Cmd.CommandText = XSqlString; Cmd.ExecuteNonQuery(); } //操作结束,关闭连接 Conn.Close(); //打开要下载的文件,并把该文件存放在FileStream中 System.IO.FileStream Reader = System.IO.File.OpenRead(newFileName); //文件传送的剩余字节数:初始值为文件的总大小 long Length = Reader.Length; HttpContext.Current.Response.Buffer = false; HttpContext.Current.Response.AddHeader("Connection", "Keep-Alive"); HttpContext.Current.Response.ContentType = "application/octet-stream"; HttpContext.Current.Response.Charset = "utf-8"; HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName); HttpContext.Current.Response.AddHeader("Content-Length", Length.ToString()); byte[] Buffer = new Byte[10000]; //存放欲发送数据的缓冲区 int ByteToRead; //每次实际读取的字节数 while (Length > 0) { //剩余字节数不为零,继续传送 if (Response.IsClientConnected) { //客户端浏览器还打开着,继续传送 ByteToRead = Reader.Read(Buffer, 0, 10000); //往缓冲区读入数据 HttpContext.Current.Response.OutputStream.Write(Buffer, 0, ByteToRead); //把缓冲区的数据写入客户端浏览器 HttpContext.Current.Response.Flush(); //立即写入客户端 Length -= ByteToRead; //剩余字节数减少 } else { //客户端浏览器已经断开,阻止继续循环 Length = -1; } } //关闭该文件 Reader.Close(); //删除该Excel文件 if (File.Exists(newFileName)) File.Delete(newFileName); }

---------------------------------------------------------------------------

2010-8-26  备注:

在项目中使用第2种方法时,出现"操作必须使用一个可更新的查询"的错误提示 ,原因是项目采用TFS管理,使Excel文件属性是只读的,解决方法是去掉只读属性:

 File.Copy(HttpContext.Current.Server.MapPath("~/Views/ActivityAdmin/ContactTemplate.xls"), newFileName, true);

在上面代码的下面加上:


 FileInfo f = new FileInfo(newFileName);
  if (f.Attributes.ToString().IndexOf("ReadOnly") != -1)
  {
        f.Attributes = FileAttributes.Normal;
 }

---------------------------------------------------------------------------

17:11 2010-12-23 备注:

用企业库读取Excel:


web.config配置:


<!--test.xls放在App_Data目录下--> <!--HDR=yes;IMEX=1表示:第一行不作为数据返回,且以文本方式读取--> <add name="testXls" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;data source=|DataDirectory|test.xls;Extended Properties='Excel 8.0;HDR=yes;IMEX=1'" providerName="System.Data.OleDb" />


*.aspx.cs代码:

using Microsoft.Practices.EnterpriseLibrary.Data; Database db = DatabaseFactory.CreateDatabase("testXls"); //[B0201$A2:C33]表示读取表B0201$的区域范围A2:C33 DataTable dt = db.ExecuteDataSet(CommandType.Text, "select * from [B0201$A2:C33]").Tables[0];

另一种不错方法:

使用HTML,CSS快速导出数据到Excel

http://www.cnblogs.com/ruinet/archive/2009/10/17/1585320.html

稍微改了下

 

public static void CreateExcel(string strTable, string fileName) { string HEADER = "<html xmlns:x=\"urn:schemas-microsoft-com:office:excel\">" + "<meta http-equiv=Content-Type content=\"text/html; charset=\"gb2312\">" + "<head>"

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