private static string GetStringValue(ArraySegment <byte> arraySegment, DataType dataType)
{
DateTime AvlEpoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var subArray = arraySegment.Array.Skip(arraySegment.Offset).Take(arraySegment.Count).ToArray();
switch (dataType)
{
// Packet Data types
case DataType.TransferId:
case DataType.DataPacketCount:
case DataType.Priority:
case DataType.Satellites:
return(subArray[0].ToString());
case DataType.Latitude:
case DataType.Longitude:
Array.Reverse(subArray);
return(BitConverter.ToInt32(subArray, 0).ToString());
case DataType.Altitude:
case DataType.Angle:
case DataType.Speed:
Array.Reverse(subArray);
return(BitConverter.ToInt16(subArray, 0).ToString());
case DataType.Timestamp:
Array.Reverse(subArray);
return(AvlEpoch.AddMilliseconds(BitConverter.ToInt64(subArray, 0)).ToString());
// Tcp types
case DataType.VehicleID:
case DataType.PacketDataArrayLength:
case DataType.Error:
Array.Reverse(subArray);
var signed32 = BitConverter.ToInt32(subArray, 0).ToString();
var unsigned = BitConverter.ToUInt32(subArray, 0).ToString();
return(signed32 == unsigned ? signed32 : string.Format("{0} / {1}", signed32, unsigned));
// Udp types
case DataType.Length:
case DataType.DeviceId:
case DataType.ImeiLength:
Array.Reverse(subArray);
var signed16 = BitConverter.ToInt16(subArray, 0).ToString();
var unsigned16 = BitConverter.ToUInt16(subArray, 0).ToString();
return(signed16 == unsigned16 ? signed16 : string.Format("{0} / {1}", signed16, unsigned16));
case DataType.PacketType:
case DataType.PacketId:
return(subArray[0].ToString());
case DataType.Imei:
return(Encoding.UTF8.GetString(subArray));
default:
throw new ArgumentOutOfRangeException();
}
}
private string GetDataTypeDisplayName()
{
var type = DataType.GetType();
var members = type.GetMember(DataType.ToString());
if (members.Length == 0)
{
return(DataType.ToString());
}
var member = members[0];
var attributes = member.GetCustomAttributes(typeof(DisplayAttribute), false);
if (attributes.Length == 0)
{
return(DataType.ToString());
}
var attribute = (DisplayAttribute)attributes[0];
return(attribute.GetName());
}
public BaseData(DataType dataType, ArraySegment <byte> arraySegment)
{
DataType = dataType;
Value = GetStringValue(arraySegment, dataType);
ArraySegment = arraySegment;
}
