private void DoWork()
{
bool isReportSetSignaled = false;
if (File.Exists(mFileName))
{
using (BinaryReader sReader = new BinaryReader(new FileStream(mFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 100)))
{
bool isEOF = false;
long fromPosition = mFromPosition > StorageHeader.STORAGE_HEADER_SIZE ? mFromPosition : StorageHeader.STORAGE_HEADER_SIZE;
long toPosition = mToPosition > 0 && mToPosition < sReader.BaseStream.Length ? mToPosition : sReader.BaseStream.Length;
long total = toPosition - fromPosition;
long fileLength = sReader.BaseStream.Length;
bool isPartial = toPosition < sReader.BaseStream.Length;
ReadHeader(sReader, false);
sReader.BaseStream.Position = fromPosition;
ReportReset();
while (!isClosing)
{
if (!isEOF)
{
DataChunk dataChunk = DataChunk.ReadDataChunk(sReader);
if (dataChunk != null)
{
ReportReceiveData(dataChunk);
}
else
{
isEOF = true;
}
if (isPartial && sReader.BaseStream.Position > toPosition)
{
isEOF = true;
}
if (total > 0)
{
ProgressValue = (byte)((sReader.BaseStream.Position - fromPosition) * 100 / total);
}
}
else
{
ProgressValue = 100;
ReportSet();
isReportSetSignaled = true;
if (isPartial)
{
break;
}
while (!isClosing && isEOF)
{
Thread.Sleep(100);
long newFileLength = sReader.BaseStream.Length;
if (newFileLength < fileLength)
{
fileLength = newFileLength;
isEOF = false;
ReadHeader(sReader, false);
ReportReset();
}
else if (newFileLength > fileLength)
{
fileLength = newFileLength;
isEOF = false;
}
}
}
}
}
}
IsOpen = false;
ProgressValue = 100;
if (!isReportSetSignaled)
{
ReportSet();
}
}
