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public static ToByteArray ( |
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/// <summary>
/// Converts a <see cref="T:System.DateTime" /> value to a byte array.
/// </summary>
/// <param name="dateTime">The DateTime value to convert.</param>
/// <returns>A byte array containing the S7 DateTimeLong representation of <paramref name="dateTime" />.</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// Thrown when the value of
/// <paramref name="dateTime" /> is before <see cref="P:SpecMinimumDateTime" />
/// or after <see cref="P:SpecMaximumDateTime" />.
/// </exception>
public static byte[] ToByteArray(System.DateTime dateTime)
{
if (dateTime < SpecMinimumDateTime)
{
throw new ArgumentOutOfRangeException(nameof(dateTime), dateTime,
$"Date time '{dateTime}' is before the minimum '{SpecMinimumDateTime}' supported in S7 DateTimeLong representation.");
}
if (dateTime > SpecMaximumDateTime)
{
throw new ArgumentOutOfRangeException(nameof(dateTime), dateTime,
$"Date time '{dateTime}' is after the maximum '{SpecMaximumDateTime}' supported in S7 DateTimeLong representation.");
}
var stream = new MemoryStream(TypeLengthInBytes);
// Convert Year
stream.Write(Word.ToByteArray(Convert.ToUInt16(dateTime.Year)), 0, 2);
// Convert Month
stream.WriteByte(Convert.ToByte(dateTime.Month));
// Convert Day
stream.WriteByte(Convert.ToByte(dateTime.Day));
// Convert WeekDay. NET DateTime starts with Sunday = 0, while S7DT has Sunday = 1.
stream.WriteByte(Convert.ToByte(dateTime.DayOfWeek + 1));
// Convert Hour
stream.WriteByte(Convert.ToByte(dateTime.Hour));
// Convert Minutes
stream.WriteByte(Convert.ToByte(dateTime.Minute));
// Convert Seconds
stream.WriteByte(Convert.ToByte(dateTime.Second));
// Convert Nanoseconds. Net DateTime has a representation of 1 Tick = 100ns.
// Thus First take the ticks Mod 1 Second (1s = 10'000'000 ticks), and then Convert to nanoseconds.
stream.Write(DWord.ToByteArray(Convert.ToUInt32(dateTime.Ticks % 10000000 * 100)), 0, 4);
return(stream.ToArray());
}
/// <summary>
/// Creates a byte array depending on the struct type.
/// </summary>
/// <param name="structValue">The struct object</param>
/// <returns>A byte array or null if fails.</returns>
public static byte[] ToBytes(object structValue)
{
Type type = structValue.GetType();
int size = Struct.GetStructSize(type);
byte[] bytes = new byte[size];
byte[] bytes2 = null;
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
System.Reflection.FieldInfo[] infos = type.GetFields();
foreach (System.Reflection.FieldInfo info in infos)
{
bytes2 = null;
switch (info.FieldType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bool)info.GetValue(structValue))
{
bytes[bytePos] |= (byte)Math.Pow(2, bitPos); // is true
}
else
{
bytes[bytePos] &= (byte)(~(byte)Math.Pow(2, bitPos)); // is false
}
numBytes += 0.125;
break;
case "Byte":
numBytes = (int)Math.Ceiling(numBytes);
bytePos = (int)numBytes;
bytes[bytePos] = (byte)info.GetValue(structValue);
numBytes++;
break;
case "Int16":
bytes2 = Int.ToByteArray((Int16)info.GetValue(structValue));
break;
case "UInt16":
bytes2 = Word.ToByteArray((UInt16)info.GetValue(structValue));
break;
case "Int32":
bytes2 = DInt.ToByteArray((Int32)info.GetValue(structValue));
break;
case "UInt32":
bytes2 = DWord.ToByteArray((UInt32)info.GetValue(structValue));
break;
case "Double":
bytes2 = Double.ToByteArray((double)info.GetValue(structValue));
break;
}
if (bytes2 != null)
{
// add them
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
bytePos = (int)numBytes;
for (int bCnt = 0; bCnt < bytes2.Length; bCnt++)
{
bytes[bytePos + bCnt] = bytes2[bCnt];
}
numBytes += bytes2.Length;
}
}
return(bytes);
}
/// <summary>
/// Creates a byte array depending on the struct type.
/// </summary>
/// <param name="sourceClass">The struct object</param>
/// <returns>A byte array or null if fails.</returns>
public static byte[] ToBytes(object sourceClass)
{
Type type = sourceClass.GetType();
int size = GetClassSize(type);
byte[] bytes = new byte[size];
byte[] bytes2 = null;
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
var properties = sourceClass.GetType().GetProperties();
foreach (var property in properties)
{
bytes2 = null;
switch (property.PropertyType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bool)property.GetValue(sourceClass, null))
{
bytes[bytePos] |= (byte)Math.Pow(2, bitPos); // is true
}
else
{
bytes[bytePos] &= (byte)(~(byte)Math.Pow(2, bitPos)); // is false
}
numBytes += 0.125;
break;
case "Byte":
numBytes = (int)Math.Ceiling(numBytes);
bytePos = (int)numBytes;
bytes[bytePos] = (byte)property.GetValue(sourceClass, null);
numBytes++;
break;
case "Int16":
bytes2 = Int.ToByteArray((Int16)property.GetValue(sourceClass, null));
break;
case "UInt16":
bytes2 = Word.ToByteArray((UInt16)property.GetValue(sourceClass, null));
break;
case "Int32":
bytes2 = DInt.ToByteArray((Int32)property.GetValue(sourceClass, null));
break;
case "UInt32":
bytes2 = DWord.ToByteArray((UInt32)property.GetValue(sourceClass, null));
break;
case "Double":
bytes2 = Double.ToByteArray((double)property.GetValue(sourceClass, null));
break;
}
if (bytes2 != null)
{
// add them
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
bytePos = (int)numBytes;
for (int bCnt = 0; bCnt < bytes2.Length; bCnt++)
{
bytes[bytePos + bCnt] = bytes2[bCnt];
}
numBytes += bytes2.Length;
}
}
return(bytes);
}
