| public static ToByteArray ( double value ) : byte[] | ||
| value | double | |
| return | byte[] | |
/// <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);
}
/// <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);
}
public bool WriteItems(Tag tag, object value)
{
lock (this)
{
try
{
if (!IsConnected())
{
return(false);
}
if (tag.TagType == "string") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = (byte)strValue.Length;
var valueByte = new byte[strlen + 1];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen > pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串的长度过长!");
}
valueByte[0] = strlen;
strbyte.CopyTo(valueByte, 1);
_plc.Write(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset + 1,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
//2020/6/11 ByteArray
if (tag.TagType == "bytearray") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = strValue.Length;
var valueByte = new byte[strlen];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen != pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串长度与定义长度不匹配!");
}
strbyte.CopyTo(valueByte, 0);
_plc.WriteBytes(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
else
{
switch (value)
{
case double d:
{
var bytes = Double.ToByteArray(d);
value = DWord.FromByteArray(bytes);
break;
}
case bool b:
value = b ? 1 : 0;
break;
}
_plc.Write(tag.Address, value);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
}
catch (Exception ex)
{
//LOG.Error(string.Format("S7 Driver写入地址{0},值{1},出错{2}", tag.Address, value,ex));
Log.Error($"S7 Driver writes address:{tag.Address}, value:{value}, Message:{ex}");
return(false);
}
}
}
