public CzkemUserFace GetUserFace(string userid)
{
var data = string.Empty;
var length = 0;
var index = 50;
var result = _czkem.GetUserFaceStr(_czkem.MachineNumber, userid, index, ref data, ref length);
if (result)
{
return(new CzkemUserFace
{
Data = data,
Length = length
});
}
return(null);
}