// http://support.microsoft.com/kb/812406/en-us/
private static void streamFileToBrowser(
HttpResponse response,
FileInfo file,
string fileName)
{
Stream iStream = null;
try
{
// Open the file.
iStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read);
// Total bytes to read:
var dataToRead = iStream.Length;
response.Cache.SetExpires(DateTime.Now - TimeSpan.FromDays(1000));
response.ContentType = MimeHelper.MapFileExtensionToMimeType(file.Extension); //@"application/octet-stream";
response.AddHeader(@"Content-Disposition", @"attachment; filename=" + fileName);
response.AddHeader(
@"Content-Length",
string.Format(
@"{0}",
file.Length));
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (response.IsClientConnected)
{
// Read the data in buffer.
var buffer = new byte[10000];
var length = iStream.Read(buffer, 0, 10000);
// Write the data to the current output stream.
response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
response.Flush();
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
finally
{
if (iStream != null)
{
iStream.Close();
iStream.Dispose();
}
response.Close();
}
}