asp.net 下载

[老蒋]

asp.net 下载

[蓝海D鱼]

ASP.NET文件下载函数(好用的东东)
Posted on 2007-03-12 15:43 Leepy 阅读(5546) 评论(25) 编辑 收藏 网摘 所属分类: .NET 综合
在你的Page_Load中添加这样的代码:

Page.Response.Clear();
bool success = ResponseFile(Page.Request, Page.Response, "目的文件名称", @"源文件路径", 1024000);
if (!success)
Response.Write("下载文件出错！");
Page.Response.End();
文件下载函数代码为:
public static bool ResponseFile(HttpRequest _Request,HttpResponse _Response,string _fileName,string _fullPath, long _speed)
{
try
{
FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
BinaryReader br = new BinaryReader(myFile);
try
{
_Response.AddHeader("Accept-Ranges", "bytes");
_Response.Buffer = false;
long fileLength = myFile.Length;
long startBytes = 0;

double pack = 10240; //10K bytes
//int sleep = 200; //每秒5次 即5*10K bytes每秒
int sleep = (int)Math.Floor(1000 * pack / _speed) + 1;
if (_Request.Headers["Range"] != null)
{
_Response.StatusCode = 206;
string[] range = _Request.Headers["Range"].Split(new char[] {'=', '-'});
startBytes = Convert.ToInt64(range[1]);
}
_Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
if (startBytes != 0)
{
//Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength-1, fileLength));
}
_Response.AddHeader("Connection", "Keep-Alive");
_Response.ContentType = "application/octet-stream";
_Response.AddHeader("Content-Disposition","attachment;filename=" + HttpUtility.UrlEncode(_fileName,System.Text.Encoding.UTF8) );

br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
int maxCount = (int) Math.Floor((fileLength - startBytes) / pack) + 1;

for (int i = 0; i < maxCount; i++)
{
if (_Response.IsClientConnected)
{
_Response.BinaryWrite(br.ReadBytes(int.Parse(pack.ToString())));
Thread.Sleep(sleep);
}
else
{
i=maxCount;
}
}
}
catch
{
return false;
}
finally
{
br.Close();

myFile.Close();
}
}
catch
{
return false;
}
return true;
}
这样就实现了文件下载时,不管是什么格式的文件,都能够弹出打开/保存窗口.

[freewind0521]

System.IO.FileInfo file = new System.IO.FileInfo(文件路径);

Response.Clear();
Response.AddHeader("Content-Disposition", "attachment;   filename=" + HttpUtility.UrlEncode(文件名));
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.Flush();
Response.Clear();
Response.End();

[zgke]

楼主是在找开发平台还是?

[馒头王子]

不好意思,二楼的意思没看懂,是对一楼的补充 || 另外一种解法?