C#文件下载实例代码（适用于各个浏览器）

1、cs代码

public void downfile(string filepath ,string filename )
{
 // filepath 文件路径 例如：/file/记录.xlsx 
 // filename 文件名称 例如：记录.xlsx （要后缀哦）
encoding encoding; // 申明编码
string outputfilename; // 输出名字
debug.assert(httpcontext.applicationinstance.request.useragent != null, "httpcontext.applicationinstance.request.useragent != null");
string browser = httpcontext.applicationinstance.request.useragent.toupper();
// 微软的浏览器和ie过滤
if (browser.contains("ms") && browser.contains("ie"))
{
outputfilename = httputility.urlencode(filepath);
encoding = encoding.default;
}
//火狐
else if (browser.contains("firefox"))
{
outputfilename = filename;
encoding = encoding.getencoding("gb2312");
}
else
{
outputfilename = httputility.urlencode(filename);
encoding = encoding.default;
}
string absolufilepath = server.mappath(filepath); //获取上传文件路径
filestream fs = new filestream(absolufilepath, filemode.open);
byte[] bytes = new byte[(int)fs.length];
fs.read(bytes, 0, bytes.length);
fs.close(); //关闭流，释放资源
httpcontext.applicationinstance.response.clear();
httpcontext.applicationinstance.response.buffer = true;
httpcontext.applicationinstance.response.contentencoding = encoding;
httpcontext.applicationinstance.response.addheader("content-disposition", string.format("attachment; filename={0}", string.isnullorempty(outputfilename) ? datetime.now.tostring("yyyymmddhhmmssfff") : outputfilename));
response.binarywrite(bytes);
response.flush();
httpcontext.applicationinstance.response.end();
}

2、html代码

前端html 写一个a标签就好：如 <a href='downfile' target='_blank'>文件下载</a>

以上所述是小编给大家介绍的c#文件下载实例代码（适用于各个浏览器），希望对大家有所帮助