在我们的系统的编写过程中,应该有很多的时候需要客户下载文件.我第一次的做法(应该也是大部分人的做法吧?)是:
1
HttpResponse response = HttpContext.Current.Response;
2
string js = "<script language=javascript>window.open('{0}');</script>";
3 js =
string.Format(js, url);
4 response.Write(js);
5
HttpResponse response = HttpContext.Current.Response;
2
string js = "<script language=javascript>window.open('{0}');</script>";
3
js =
string.Format(js, url);
4
response.Write(js);
5
但是有个问题了,就是会被广告拦截软件直接拦截掉,另我非常的头痛,于是寻找更好的解决方法.看了用Response.BinaryWrite写文件流一文之后觉得确实可以如此,修改代码如下:
1
/// <summary>
2
/// 下载文件
3 /// </summary>
4
/// <param name="filename">文件物理地址</param>
5
6
protected
void DownloadFile(
string filename)
7
{
8 string saveFileName = "test.xls";
9 int intStart = filename.LastIndexOf("\\")+1;
10 saveFileName = filename.Substring(intStart,filename.Length-intStart);
11 FileStream MyFileStream;
12 long FileSize;
13
14 MyFileStream = new FileStream(filename,FileMode.Open);
15 FileSize = MyFileStream.Length;
16
17 byte[] Buffer = new byte[(int)FileSize];
18 MyFileStream.Read(Buffer, 0, (int)FileSize);
19 MyFileStream.Close();
20
21 Response.AddHeader("Content-Disposition", "attachment;filename="+saveFileName);
22 Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
23 Response.ContentType = "application/vnd.ms-excel";
24
25 Response.BinaryWrite(Buffer);
26 Response.Flush();
27 Response.Close();
28 Response.End();
29
30 }
31
/// <summary>2
/// 下载文件3
/// </summary>4
/// <param name="filename">文件物理地址</param>
5
6
protected
void DownloadFile(
string filename)
7
{8
string saveFileName = "test.xls";9
int intStart = filename.LastIndexOf("\\")+1;10
saveFileName = filename.Substring(intStart,filename.Length-intStart);11
FileStream MyFileStream; 12
long FileSize; 13
14
MyFileStream = new FileStream(filename,FileMode.Open); 15
FileSize = MyFileStream.Length; 16
17
byte[] Buffer = new byte[(int)FileSize]; 18
MyFileStream.Read(Buffer, 0, (int)FileSize); 19
MyFileStream.Close(); 20
21
Response.AddHeader("Content-Disposition", "attachment;filename="+saveFileName);22
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");23
Response.ContentType = "application/vnd.ms-excel"; 24
25
Response.BinaryWrite(Buffer); 26
Response.Flush(); 27
Response.Close(); 28
Response.End();29
30
}
31
但是有个严重的问题，就是文件格式。这样只是将流输出，且无法正确识别格式。还好，能人层出不穷， 柚子Nan 提出了能否不考虑文件的类型，直接把文件显示到浏览器(Response) 的想法正好切中我的要害所在，于是急忙研究了柚子Nan的想法，修改出最后代码：
1
/// <summary>
2 /// 下载文件
3 /// </summary>
4 /// <param name="filename">文件物理地址</param>
5
protected
void DownloadFile(
string filename)
6
{
7 string saveFileName = "test.xls";
8 int intStart = filename.LastIndexOf("\\")+1;
9 saveFileName = filename.Substring(intStart,filename.Length-intStart);
10
11 Response.Clear();
12 Response.Charset = "utf-8";
13 Response.Buffer= true;
14 this.EnableViewState = false;
15 Response.ContentEncoding = System.Text.Encoding.UTF8;
16
17 Response.AppendHeader("Content-Disposition","attachment;filename=" + saveFileName);
18 Response.WriteFile(filename);
19 Response.Flush();
20 Response.Close();
21
22 Response.End();
23 }
/// <summary>2
/// 下载文件3
/// </summary>4
/// <param name="filename">文件物理地址</param>
5
protected
void DownloadFile(
string filename)
6
{7
string saveFileName = "test.xls";8
int intStart = filename.LastIndexOf("\\")+1;9
saveFileName = filename.Substring(intStart,filename.Length-intStart);10
11
Response.Clear();12
Response.Charset = "utf-8";13
Response.Buffer= true;14
this.EnableViewState = false;15
Response.ContentEncoding = System.Text.Encoding.UTF8;16
17
Response.AppendHeader("Content-Disposition","attachment;filename=" + saveFileName); 18
Response.WriteFile(filename); 19
Response.Flush();20
Response.Close();21
22
Response.End();23
}
分类:
妙手偶得,
1.首页原创精华.NET区123
本文转自浪子博客园博客，原文链接：http://www.cnblogs.com/walkingboy/archive/2005/09/21/241127.html，如需转载请自行联系原作者
