/// <summary>
/// Raises UnitCopy Event
/// </summary>
/// <param name="e"></param>
protected virtual void OnUnitCopy(UnitCopyEventArgs e)
{
if (UnitCopy != null)
{
UnitCopy(this, e);
}
}
/// <summary>
/// Copies a file in units
/// </summary>
/// <param name="source">Source File</param>
/// <param name="target">Target File</param>
/// <param name="unit">Number of bytes that is copied at once. Reverted to 2^20 if 0</param>
/// <param name="overwriteTarget">Specifies whether the target file is over writen is it already exists otherwise an exception is thrown</param>
public void Copy(string source, string target, int unit, bool overwriteTarget)
{
// Create target folder in case it doesent't exist
Directory.CreateFolder(GetFileParent(target));
// set defaults
if (unit == 0)
{
unit = (int)Math.Pow(2, 20); // 1 MB
}
FileMode targetMode;
if (overwriteTarget)
{
targetMode = FileMode.Create;
}
else
{
targetMode = FileMode.CreateNew;
}
// Streams
FileStream sourceStream = new FileStream(source, FileMode.Open, FileAccess.Read, FileShare.Read);
FileStream targetStream = new FileStream(target, targetMode, FileAccess.Write, FileShare.None);
BinaryReader sourceReader = new BinaryReader(sourceStream);
BinaryWriter targetWriter = new BinaryWriter(targetStream);
// Counters
int loopCount = (int)(sourceStream.Length / unit);
long bytesleft = sourceStream.Length;
if (bytesleft <= unit)
{
unit = (int)bytesleft;
}
// Copier Loop
for (int i = 0; i <= loopCount; i++)
{
targetWriter.Write(sourceReader.ReadBytes(unit)); // Perform Copying
// Call Event Raiser
UnitCopyEventArgs e = new UnitCopyEventArgs(source, target, sourceStream.Length, sourceStream.Length - bytesleft, unit);
this.OnUnitCopy(e);
bytesleft -= unit;
if (bytesleft <= unit)
{
unit = (int)bytesleft;
}
// Check for stop
if (m_resume == false)
{
// Close Streams
sourceReader.Close();
targetWriter.Close();
sourceStream.Close();
targetStream.Close();
// delete current file
System.IO.File.Delete(target);
// Call Event Raiser
this.OnAfterStop();
// exit loop
break;
}
}
// Close Streams
sourceReader.Close();
targetWriter.Close();
sourceStream.Close();
targetStream.Close();
}