/// <summary>
/// 同步写
/// </summary>
/// <param name="dataPointID"></param>
/// <param name="value"></param>
/// <returns></returns>
public bool Write(int dataPointID, object value)
{
IntPtr pErrors = IntPtr.Zero;
try
{
object[] obj = new object[] { value };
OPCSyncIO.Write(1, new int[] { OpcItems[dataPointID].ServerItemHandle }, obj, out pErrors);
int[] errors = new int[1];
Marshal.Copy(pErrors, errors, 0, 1);
if (errors[0] != 0)
{
throw new ApplicationException($"数据点(ID:{dataPointID})同步写入失败。");
}
return(true);
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
}
}
/*------------------------------------------------------
* Execute SyncWrite
*
* (ret) True OK
* False NG
* ------------------------------------------------------*/
public bool SyncWrite(int[] ServerHd, object[] Value)
{
int iItemCount = ServerHd.Length;
IOPCSyncIO OPCSyncIO;
IOPCSyncIO2 OPCSyncIO2;
IntPtr ppErrors;
int[] errors = new int[iItemCount];
try
{
switch (m_OpcdaVer)
{
case DEF_OPCDA.VER_30:
OPCSyncIO2 = (IOPCSyncIO2)m_OPCGroup2;
OPCSyncIO2.Write(iItemCount, ServerHd, Value, out ppErrors);
Marshal.Copy(ppErrors, errors, 0, iItemCount);
Marshal.FreeCoTaskMem(ppErrors);
break;
case DEF_OPCDA.VER_10:
case DEF_OPCDA.VER_20:
default:
OPCSyncIO = (IOPCSyncIO)m_OPCGroup;
OPCSyncIO.Write(iItemCount, ServerHd, Value, out ppErrors);
Marshal.Copy(ppErrors, errors, 0, iItemCount);
Marshal.FreeCoTaskMem(ppErrors);
break;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "SyncWrite");
return(false);
}
// erase errors
System.GC.Collect(); //04/12/29 Revised Memory Leak
return(true);
}
/// <summary>
/// 同步读
/// </summary>
/// <param name="dataPointID"></param>
/// <returns></returns>
public object Read(int dataPointID)
{
IntPtr itemValues = IntPtr.Zero;
IntPtr pErrors = IntPtr.Zero;
try
{
OPCSyncIO.Read(OPCDATASOURCE.OPC_DS_DEVICE, 1,
new int[] { OpcItems[dataPointID].ServerItemHandle }, out itemValues, out pErrors);
int[] error = new int[1];
Marshal.Copy(pErrors, error, 0, error.Length);
if (error[0] == 0)
{
OPCITEMSTATE itemState = (OPCITEMSTATE)Marshal.PtrToStructure(itemValues, typeof(OPCITEMSTATE));
return(itemState.vDataValue);
}
else
{
throw new ApplicationException($"数据点(ID:{dataPointID})同步读取失败。");
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (itemValues != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(itemValues);
itemValues = IntPtr.Zero;
}
if (pErrors != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pErrors);
pErrors = IntPtr.Zero;
}
}
}
/*------------------------------------------------------
* Execute SyncRead
*
* (ret) True OK
* False NG
* ------------------------------------------------------*/
public bool SyncRead(OpcRcw.Da.OPCDATASOURCE DataSource, int[] ServerHd, object[] Values, OpcRcw.Da.FILETIME[] TimeStamps, short[] Qualities)
{
int iItemCount = ServerHd.Length;
IOPCSyncIO OPCSyncIO;
IOPCSyncIO2 OPCSyncIO2;
IntPtr ppItemVal;
IntPtr ppErrors;
IntPtr posItem;
int[] Errors = new int[iItemCount];
OPCITEMSTATE ItemState;
int i;
try
{
switch (m_OpcdaVer)
{
case DEF_OPCDA.VER_30:
OPCSyncIO2 = (IOPCSyncIO2)m_OPCGroup2;
OPCSyncIO2.Read(DataSource, iItemCount, ServerHd, out ppItemVal, out ppErrors);
Marshal.Copy(ppErrors, Errors, 0, iItemCount);
posItem = ppItemVal;
for (i = 0; i < iItemCount; i++)
{
ItemState = (OPCITEMSTATE)Marshal.PtrToStructure(posItem, typeof(OPCITEMSTATE));
if (Errors[i] == 0)
{
Values[i] = ItemState.vDataValue;
TimeStamps[i] = ItemState.ftTimeStamp;
Qualities[i] = ItemState.wQuality;
}
Marshal.DestroyStructure(posItem, typeof(OPCITEMSTATE)); // 05/02/08 Release memory
//posItem = new IntPtr(posItem.ToInt32() + Marshal.SizeOf(typeof(OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
posItem = (IntPtr)(posItem.ToInt32() + Marshal.SizeOf(typeof(OpcRcw.Da.OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
}
Marshal.FreeCoTaskMem(ppItemVal);
Marshal.FreeCoTaskMem(ppErrors);
break;
case DEF_OPCDA.VER_10:
case DEF_OPCDA.VER_20:
default:
OPCSyncIO = (IOPCSyncIO)m_OPCGroup;
OPCSyncIO.Read(DataSource, iItemCount, ServerHd, out ppItemVal, out ppErrors);
Marshal.Copy(ppErrors, Errors, 0, iItemCount);
posItem = ppItemVal;
for (i = 0; i < iItemCount; i++)
{
ItemState = (OPCITEMSTATE)Marshal.PtrToStructure(posItem, typeof(OPCITEMSTATE));
if (Errors[i] == 0)
{
Values[i] = ItemState.vDataValue;
TimeStamps[i] = ItemState.ftTimeStamp;
Qualities[i] = ItemState.wQuality;
}
Marshal.DestroyStructure(posItem, typeof(OPCITEMSTATE)); // 05/02/08 Release memory
//posItem = new IntPtr(posItem.ToInt32() + Marshal.SizeOf(typeof(OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
posItem = (IntPtr)(posItem.ToInt32() + Marshal.SizeOf(typeof(OpcRcw.Da.OPCITEMSTATE))); // 1.0.0.5 10/06/21 Kishimoto Fixed for Memory Leak
}
Marshal.FreeCoTaskMem(ppItemVal);
Marshal.FreeCoTaskMem(ppErrors);
break;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "SyncRead");
return(false);
}
// erase Errors
System.GC.Collect(); //04/12/29 Revised Memory Leak
return(true);
}
