public void DownloadFileBySegmentation(BacnetClient comm, BacnetAddress adr, BacnetObjectId object_id, string filename, Action <int> progress_action)
{
Cancel = false;
//open file
System.IO.FileStream fs = null;
try
{
fs = System.IO.File.OpenWrite(filename);
}
catch (Exception ex)
{
throw new System.IO.IOException("Couldn't open file", ex);
}
BacnetMaxSegments old_segments = comm.MaxSegments;
comm.MaxSegments = BacnetMaxSegments.MAX_SEG65; //send as many segments as needed
comm.ProposedWindowSize = Properties.Settings.Default.Segments_ProposedWindowSize; //set by options
comm.ForceWindowSize = true;
try
{
int position = 0;
//uint count = (uint)comm.GetFileBufferMaxSize() * 20; //this is more realistic
uint count = 50000; //this is more difficult
bool end_of_file = false;
byte[] buffer;
int buffer_offset;
while (!end_of_file && !Cancel)
{
//read from device
if (!comm.ReadFileRequest(adr, object_id, ref position, ref count, out end_of_file, out buffer, out buffer_offset))
{
throw new System.IO.IOException("Couldn't read file");
}
position += (int)count;
//write to file
if (count > 0)
{
fs.Write(buffer, buffer_offset, (int)count);
if (progress_action != null)
{
progress_action(position);
}
}
}
}
finally
{
fs.Close();
comm.MaxSegments = old_segments;
comm.ForceWindowSize = false;
}
}
public void DownloadFileByBlocking(BacnetClient comm, BacnetAddress adr, BacnetObjectId object_id, string filename, Action <int> progress_action)
{
Cancel = false;
//open file
System.IO.FileStream fs = null;
try
{
fs = System.IO.File.OpenWrite(filename);
}
catch (Exception ex)
{
throw new System.IO.IOException("Couldn't open file", ex);
}
int position = 0;
uint count = (uint)comm.GetFileBufferMaxSize();
bool end_of_file = false;
byte[] buffer;
int buffer_offset;
try
{
while (!end_of_file && !Cancel)
{
//read from device
if (!comm.ReadFileRequest(adr, object_id, ref position, ref count, out end_of_file, out buffer, out buffer_offset))
{
throw new System.IO.IOException("Couldn't read file");
}
position += (int)count;
//write to file
if (count > 0)
{
fs.Write(buffer, buffer_offset, (int)count);
if (progress_action != null)
{
progress_action(position);
}
}
}
}
finally
{
fs.Close();
}
}
