100分求asp.net下载,弹出保存远程服务器文件方法(要支持迅雷) 最近需要做一个asp.net的网页下载功能,在网上搜了半天没找到合适的,要求:点击“下载”的时候,能弹出文件保存对话框,如果迅雷监视开着的话,会弹出迅雷下载,下载网页与文件不在同一台服务器上,就是要求根据一个网络路径下载文件,比如http://www.baidu.com/img/baidu_logo.gif这种路径,求高手答案啊,十分感谢!!!贴子最高上限只能给100分了,不然我会多给点分 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 现在我用下面这种方式,不过不太好,求其他更好的方法:Response.AppendHeader("Content-Disposition", "attachment;filename=" + filename); Response.ContentType = "application/octet-stream"; HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(strFilePath); HttpWebResponse myWebResponse = (HttpWebResponse)myWebRequest.GetResponse(); Stream readStream = myWebResponse.GetResponseStream(); int chunkSize = 4096; byte[] bytes = new byte[chunkSize]; int intBytesRead = readStream.Read(bytes, 0, bytes.Length); while (intBytesRead > 0) { Response.OutputStream.Write(bytes, 0, intBytesRead); bytes = new byte[chunkSize]; intBytesRead = readStream.Read(bytes, 0, bytes.Length); } readStream.Close(); myWebResponse.Close(); 你说的“直接输文件路径”,是什么意思?是用<a href=url这种方式吗?这种方式是不行的,图片还有TXT文件就会直接打开的,而不是下载 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; } ASPX.CS使用Page.Response.Clear();bool success = Functions.ResponseFile(Page.Request, Page.Response, Request.QueryString["target"], Server.MapPath("~/UpLoad/Files/" + Request.QueryString["target"]), 20000000);if (!success) Response.Write("下载文件出错!"); 你可以在后台获取相对路径“~/xxx.rar”,直接传给前台,用response.redirect(相对地址),基本上什么都能下,不影响网页浏览 Response.ContentType = "application/save" ; //无论那种格式都是下载。而不是用Response.ContentType = "application/octet-stream"; 用代码运行结果对比就知道了,我就不多用文字解释了。 protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ReadFileWriterBinary("http://www.baidu.com/img/baidu_logo.gif", "logo.gif"); } } private void ReadFileWriterBinary(string path, string fileName) { HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(path); HttpWebResponse myWebResponse = (HttpWebResponse)myWebRequest.GetResponse(); Stream readStream = myWebResponse.GetResponseStream(); BinaryReader SplitFileReader = new BinaryReader(readStream); byte[] TempBytes; HttpContext.Current.Response.ContentType = "application/save"; // HttpContext.Current.Response.ContentType = "application/octet-stream"; HttpContext.Current.Response.HeaderEncoding = System.Text.Encoding.GetEncoding("gb2312"); HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=\"" +fileName + "\""); TempBytes = SplitFileReader.ReadBytes(Convert.ToInt32(myWebResponse.ContentLength)); HttpContext.Current.Response.BinaryWrite(TempBytes); SplitFileReader.Close(); readStream.Close(); } 你这个方法和我的原理差不多吧,如果右键单击“下载”,然后也可以下载到文件,但是文件名好像没有起作用,就是那个filename在迅雷里没起作用,这个你有法子解决吗? 我试过在迅雷弹出保存文件对话框,保存文件名是ASP.NET的test.aspx文件,下载完成之后,test.aspx会变成原来的文件(如.jpg文件)。 mvc 一对多的关系,怎么修改存储的值 【交流--数据层开发的技巧】 如何把SiteMap数据存储在数据库里? 不能向asp table中添加任何控件 高手请进!__用C#做的简易qq,但菜鸟的我不知道原因,请指教! 请问:如何将用ASP编写页面的COOKIES,读取到ASP.NET页面中[C#]? 如何判断提交过来的表单的日期是否合法????????????? ado.net中提供了多种数据库连接方式,哪位大哥能详细的讲解一下每种连接的优缺点和注意事项? 有关数据库问题 一个简单的问题 快吐血了~Windows Server 2008 IIS下网站部署问题 (急)
Response.ContentType = "application/octet-stream";
HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(strFilePath);
HttpWebResponse myWebResponse = (HttpWebResponse)myWebRequest.GetResponse();
Stream readStream = myWebResponse.GetResponseStream();
int chunkSize = 4096;
byte[] bytes = new byte[chunkSize];
int intBytesRead = readStream.Read(bytes, 0, bytes.Length);
while (intBytesRead > 0)
{
Response.OutputStream.Write(bytes, 0, intBytesRead);
bytes = new byte[chunkSize];
intBytesRead = readStream.Read(bytes, 0, bytes.Length);
}
readStream.Close();
myWebResponse.Close();
你说的“直接输文件路径”,是什么意思?是用<a href=url这种方式吗?这种方式是不行的,图片还有TXT文件就会直接打开的,而不是下载
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;
}
bool success = Functions.ResponseFile(Page.Request, Page.Response, Request.QueryString["target"], Server.MapPath("~/UpLoad/Files/" + Request.QueryString["target"]), 20000000);
if (!success)
Response.Write("下载文件出错!");
Response.ContentType = "application/save" ; //无论那种格式都是下载。
而不是用
Response.ContentType = "application/octet-stream";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ReadFileWriterBinary("http://www.baidu.com/img/baidu_logo.gif", "logo.gif");
}
} private void ReadFileWriterBinary(string path, string fileName)
{
HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(path);
HttpWebResponse myWebResponse = (HttpWebResponse)myWebRequest.GetResponse();
Stream readStream = myWebResponse.GetResponseStream();
BinaryReader SplitFileReader = new BinaryReader(readStream);
byte[] TempBytes;
HttpContext.Current.Response.ContentType = "application/save";
// HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.HeaderEncoding = System.Text.Encoding.GetEncoding("gb2312");
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=\"" +fileName + "\"");
TempBytes = SplitFileReader.ReadBytes(Convert.ToInt32(myWebResponse.ContentLength));
HttpContext.Current.Response.BinaryWrite(TempBytes);
SplitFileReader.Close();
readStream.Close(); }
你这个方法和我的原理差不多吧,如果右键单击“下载”,然后也可以下载到文件,但是文件名好像没有起作用,就是那个filename在迅雷里没起作用,这个你有法子解决吗?