internal void StartUploadFile(ProgressViewModel <System.IO.FileInfo> item, Action <long> uploadCompletedCallback)
{
var us = new UploadFile("", item.Body);
//var sm = us.Stream;
var tl = us.File.Length;
//long datalength = 0;
var hs = new SHA256Managed().ComputeHash(us.Stream);
us.Stream.Position = 0;
//var ht = HashType.Sha256;
//var fn = us.File.Name;
//this.SendData(us.Stream,0,us.File.Length,r=>0,us.File.Length,
//UploadFilePartial(item, uploadCompletedCallback);
long offset = us.Stream.Position;
us.Read(0);
UploadFilePartial(item, uploadCompletedCallback, us, tl, hs, offset);
}
