// The read method, reads data from the virtual channel
private void read(out byte[] data)
{
byte[] readInData = new byte[1536];
GCHandle pinned = GCHandle.Alloc(readInData, GCHandleType.Pinned);
IntPtr address = pinned.AddrOfPinnedObject();
uint bytesread = 0;
int returnValue = WTSapi32.WTSVirtualChannelRead(handle, int.MaxValue, readInData, 1536, out bytesread);
pinned.Free();
byte[] correct = new byte[bytesread];
Array.Copy(readInData, correct, bytesread);
data = correct;
Array.Clear(readInData, 0, readInData.Length);
Application.DoEvents();
}
private void buttonSendFile_Click(object sender, EventArgs e)
{
openFDToSendVC.Title = "Choose a file to transmit";
openFDToSendVC.FileName = "";
openFDToSendVC.InitialDirectory = System.Environment.GetFolderPath(Environment.SpecialFolder.Personal);
openFDToSendVC.Filter = "All Files|*.*";
string path = "";
if (openFDToSendVC.ShowDialog() != DialogResult.Cancel)
{
path = openFDToSendVC.FileName;
}
try
{
// Send the file title
string filename = Path.GetFileName(path);
string sEncode = System.Convert.ToBase64String(System.Text.Encoding.Unicode.GetBytes("title:" + filename)); //to be used for base64 encoding
byte[] bData = System.Text.Encoding.Unicode.GetBytes(sEncode);
int bytesWritten = 0;
WTSapi32.WTSVirtualChannelWrite(handle, bData, bData.Length, ref bytesWritten);
FileInfo fi = new FileInfo(path);
// Display the ProgressBar control.
progressBarSleipnir.Visible = true;
// Set Minimum to 1 to represent the first char being sent.
progressBarSleipnir.Minimum = 1;
// Set Maximum to the file size.
progressBarSleipnir.Maximum = (int)fi.Length;
// Set the initial value of the ProgressBar.
progressBarSleipnir.Value = 1;
// Set the Step property to a value of 1024 to represent each each buffer being read.
progressBarSleipnir.Step = 1024;
using (FileStream fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var stream = new MemoryStream())
{
byte[] buffer = new byte[1024]; // read in chunks of 1KB
int bytesRead = 0;
while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
{
byte[] title;
read(out title);
string sReceived = "";
foreach (byte b in title)
{
if (b != 0)
{
char c = Convert.ToChar(b);
sReceived += c;
}
else
{
}
}
if (sReceived == "Received")
{
string sEncoded = System.Convert.ToBase64String(buffer);
byte[] bEncoded = System.Text.Encoding.Unicode.GetBytes(sEncoded);
WTSapi32.WTSVirtualChannelWrite(handle, bEncoded, bEncoded.Length, ref bytesWritten);
Array.Clear(buffer, 0, buffer.Length);
Application.DoEvents();
progressBarSleipnir.PerformStep();
}
else if (sReceived == "Cancelled")
{
Array.Clear(buffer, 0, buffer.Length);
break;
}
sReceived = "";
Array.Clear(buffer, 0, buffer.Length);
}
byte[] terminator = System.Text.Encoding.Unicode.GetBytes(System.Convert.ToBase64String(System.Text.Encoding.Unicode.GetBytes("!!!")));
WTSapi32.WTSVirtualChannelWrite(handle, terminator, terminator.Length, ref bytesWritten);
Array.Clear(buffer, 0, buffer.Length);
}
}
catch (Exception error)
{
Console.WriteLine("The process failed: {0}", error.ToString());
}
}