C#

string Block = "1111111111";
string a = "87654321";
string m = "2222";
string c = "11";
string u = "99";
string v = "00";


byte[] result = W(
    SoapHexBinary.Parse(a).Value,
    SoapHexBinary.Parse(m).Value,
    SoapHexBinary.Parse(v).Value[0],
    SoapHexBinary.Parse(u).Value[0],
    SoapHexBinary.Parse(c).Value[0],
    SoapHexBinary.Parse(Block).Value
);

Dim Block As String = "AAAAAAAAAA"

Dim a As String = "99999999"
Dim m As String = "3333"
Dim a As String = "77"
Dim u As String = "07"
Dim v As String = "00"

Dim result As String = ""

result = W(a, m, v, u, a, Block)

Object reference not set to an instance of an object.

protected void DocumentUpload_OnFileUploadComplete(object sender, FileUploadCompleteEventArgs e)
      {
          if (!e.UploadedFile.IsValid) return;

          GridViewDetailRowTemplateContainer container = ((Control)sender).NamingContainer as GridViewDetailRowTemplateContainer;
          Int32 index = container.VisibleIndex;

          var orderId = Convert.ToInt32(ViewOrdersGridView.GetRowValues(index, ViewOrdersGridView.KeyFieldName));
          var fileNumber = ViewOrdersGridView.GetRowValues(index, ElsaConstants.FileNumber).ToString();
          var userId = Convert.ToInt32(Session[ElsaConstants.UserId]);
          string directory = ConfigurationManager.AppSettings[ElsaConstants.UploadDirectory];
          if (!Directory.Exists(directory))
          {
              Directory.CreateDirectory(directory);
          }

          string fileType = Path.GetExtension(e.UploadedFile.FileName);
          string fileName = e.UploadedFile.FileName.Replace(fileType, string.Format("_{0}{1}", fileNumber, fileType));
          string resultFilePath = directory + fileName;
          e.UploadedFile.SaveAs(resultFilePath, true);//MapPath

          using (var context = new ELSAEntities())
          {
              var document = new Document
              {
                  OrderId = orderId,
                  DocumentPath = fileName,
                  DateCreated = DateTime.Now,
                  CreatedBy = userId
              };

              context.Document.Add(document);
              context.SaveChanges();
          }
      }