///<summary>
///流方式下載壓縮文件
///</summary>
///<paramname="dirFile">要下載的文件路徑</param>
publicvoidXiaZai(string dirFile)
{
try
{
string fileName = dirFile + ".zip";//客戶端保存的文件名
string filePath = WebSite.IMAGESERVER_LOCALPATH+ fileName;//路徑
//以字符流的形式下載文件
FileStream fs = newFileStream(filePath, FileMode.Open);
byte[] bytes = newbyte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.ContentType = "application/octet-stream";
//通知瀏覽器下載文件而不是打開
Response.AddHeader("Content-Disposition","attachment; filename=" + HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8));
Response.BinaryWrite(bytes);
}
catch(Exception ex)
{
Response.Write("error");
}
finally
{
Response.Flush();
Response.Close();
}
}
///<summary>
///分塊下載
///</summary>
///<paramname="dirFile">要下載的文件路徑</param>
publicvoidfenKuai(string dirFile)
{
stringfileName = dirFile + ".zip";//客戶端保存的文件名
stringfilePath = WebSite.IMAGESERVER_LOCALPATH + fileName;//路徑
System.IO.FileInfo fileInfo = newSystem.IO.FileInfo(filePath);
try
{
if (fileInfo.Exists == true)
{
const longChunkSize = 102400;//100K 每次讀取文件，只讀取100Ｋ，這樣可以緩解服務器的壓力
byte[] buffer = newbyte[ChunkSize];
Response.Clear();
System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
long dataLengthToRead = iStream.Length;//獲取下載的文件總大小
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition","attachment; filename=" + HttpUtility.UrlEncode(fileName));
while (dataLengthToRead > 0 &&Response.IsClientConnected)
{
intlengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));//讀取的大小
Response.OutputStream.Write(buffer, 0, lengthRead);
Response.Flush();
dataLengthToRead =dataLengthToRead - lengthRead;
}
}
}
catch (Exception ex)
{
Response.Write("error");
}
finally
{
Response.Close();
}
}
