public void ShowAsync(int Id)
{
string webRootPath = Server.MapPath("~/WEBVOUCHERFOLDER");
AsyncManager.OutstandingOperations.Increment();
AsyncManager.Timeout = ASINCH_TIMEOUT;
var tcpBinding = ScanServiceClient.GetBinding();
var endpointAddress = ScanServiceClient.GetEnpoint();
ScanServiceClient proxy = new ScanServiceClient(tcpBinding, endpointAddress);
proxy.ReadVoucherInfoCompleted += OnReadVoucherInfoCompleted;
var keys = Security.CreateInstance().GenerateSecurityKeys();
proxy.ReadVoucherInfoAsync(Id, webRootPath, keys.Item1, keys.Item2);
}