public void DownloadFileByStream(string fileName, string filePath)
{
filePath = HttpContext.Current.Server.MapPath(filePath); //目标文件路径
FileHelper.FileInfoHelper file = new FileHelper.FileInfoHelper(filePath);
FileStream fs = new FileStream(filePath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
HttpContext.Current.Response.ContentType = "application/octet-stream";
//通知浏览器下载文件而不是打开
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
HttpContext.Current.Response.BinaryWrite(bytes);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
public void DownloadFile(string fileName, string filePath)
{
filePath = HttpContext.Current.Server.MapPath(filePath); //目标文件路径
FileHelper.FileInfoHelper file = new FileHelper.FileInfoHelper(filePath);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
HttpContext.Current.Response.AddHeader("Content-Transfer-Encoding", "binary");
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
HttpContext.Current.Response.WriteFile(file.FullName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
public void DownloadFileByBlock(string fileName, string filePath)
{
filePath = HttpContext.Current.Server.MapPath(filePath); //目标文件路径
FileHelper.FileInfoHelper file = new FileHelper.FileInfoHelper(filePath);
if (file.Exists)
{
const long ChunkSize = 102400; //100K 每次读取文件，只读取100K，这样可以缓解服务器的压力
byte[] buffer = new byte[ChunkSize];
HttpContext.Current.Response.Clear();
System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
long dataLengthToRead = iStream.Length; //获取下载的文件总大小
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
while (dataLengthToRead > 0 && HttpContext.Current.Response.IsClientConnected)
{
int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize)); //读取的大小
HttpContext.Current.Response.OutputStream.Write(buffer, 0, lengthRead);
HttpContext.Current.Response.Flush();
dataLengthToRead = dataLengthToRead - lengthRead;
}
HttpContext.Current.Response.Close();
}
}
