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if (filelist != null)
{
foreach (var file in filelist)
{
string strFileName = file;
long page = BLL.Files.GetFilePageCount(Serial, GUID, strFileName);
string destFileName = string.Format(@"" + FolderPathName + "" + strFileName + "");
if (System.IO.File.Exists(destFileName))
{
System.IO.File.Delete(destFileName);
}
using (FileStream fs = File.Open(destFileName, FileMode.OpenOrCreate, FileAccess.Write))
{
for (int i = 0; i < page; i++)
{
byte[] buffer = new byte[1024 * 64];
buffer = BLL.Files.GetData(Serial, GUID, strFileName, i);
fs.Write(buffer, 0, buffer.Length);
int Percent = i / int.Parse(page.ToString()) * 100;
}
fs.Flush();
fs.Close();
}
}
抓取数据流生成文件。
string fileName = "a.zip";//客户端保存的文件名
//string filePath = Server.MapPath("DownLoad/one.txt");//路径
System.IO.FileInfo fileinfo = new System.IO.FileInfo(filepath);
if (fileinfo.Exists == true)
{
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];
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
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName));
while (dataLengthToRead > 0 && Response.IsClientConnected)
{
int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));//读取的大小
Response.OutputStream.Write(buffer, 0, lengthRead);
Response.Flush();
dataLengthToRead = dataLengthToRead - lengthRead;
}
Response.Close();
}
文件下载代码。
中间还有一个生成压缩包的代码,感觉用处不大,就不贴了。