C#导出导入Excel（企业库）
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
?
"
男
"
:
"
女
"
; 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
"
?
"
男
"
:
"
女
"
)
+
"
',
"
; 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>
"
+
"
<!--[if gte mso 9]><xml>
"
+
"
<x:ExcelWorkbook>
"
+
"
<x:ExcelWorksheets>
"
+
"
<x:ExcelWorksheet>
"
+
"
<x:Name>Sheet1</x:Name>
"
+
"
<x:WorksheetOptions>
"
+
"
<x:Print>
"
+
"
<x:ValidPrinterInfo />
"
+
"
</x:Print>
"
+
"
</x:WorksheetOptions>
"
+
"
</x:ExcelWorksheet>
"
+
"
</x:ExcelWorksheets>
"
+
"
</x:ExcelWorkbook>
"
+
"
</xml>
"
+
"
<![endif]-->
"
; System.Web.HttpContext.Current.Response.ContentEncoding
=
System.Text.Encoding.GetEncoding(
"
GB2312
"
); System.Web.HttpContext.Current.Response.AppendHeader(
"
Content-Disposition
"
,
"
attachment;filename=
"
+
System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8)); System.Web.HttpContext.Current.Response.ContentType
=
"
ms-excel/application
"
; StringBuilder sbHtml
=
new
StringBuilder(); sbHtml.AppendFormat(
@"
{0}</head> <body>{1}</body> </html>
"
, HEADER, strTable); System.Web.HttpContext.Current.Response.Write(sbHtml.ToString()); System.Web.HttpContext.Current.Response.Flush(); System.Web.HttpContext.Current.Response.Clear(); System.Web.HttpContext.Current.Response.End(); }