public void GetItemProperties(string id, out string[] descriptions, out MyVariant[] values)
{
//out
descriptions = null;
values = null;
//local variable
int count;
IntPtr propertyIDs;
IntPtr des;
IntPtr dataTypes;
IntPtr data;
IntPtr Error;
int ret = m_pIProperties.QueryAvailableProperties(id, out count, out propertyIDs,
out des, out dataTypes);
if (ret >= 0 && ((int)propertyIDs) != 0 && ((int)dataTypes) != 0 &&
((int)des) != 0)
{
if (count > 0)
{
int[] propIDs = IntArrayFromIntPtr(propertyIDs, count);
VarEnum[] types = VarEnumArrayFromIntPtr(dataTypes, count);
ret = m_pIProperties.GetItemProperties(id, count, propIDs, out data, out Error);
if (ret >= 0 && ((int)data) != 0 && ((int)Error) != 0)
{
int[] err = IntArrayFromIntPtr(Error, count);
descriptions = StringArrayFromIntPtr(des, count);
values = new MyVariant[count];
int i = 0;
int actData = (int)data;
foreach (int item in err)
{
if (item == 0)
{
object temp = Marshal.GetObjectForNativeVariant((IntPtr)(actData));
values[i] = new MyVariant(temp, types[i]);
}
else
{
values[i] = new MyVariant(null, VarEnum.VT_EMPTY);
//parent.PrintMessage("Server: Read Item Properties " + id + "(" + descriptions[i] + ")" + " is failed hr =" + item, MessageStyl.error);
}
i++;
actData += 16;
}
Marshal.FreeCoTaskMem(data);
}
else
{
throw new Exception("Function GetItemProperties failed. Error code = " + ret.ToString());
}
}
}
else
{
throw new Exception("Function QueryAvailableProperties failed. Error code = " + ret.ToString());
}
}
public void ReadItems(string[] id, int[] ItemHANDLES, VarEnum[] arrayType, out MyVariant[] returnValue)
{
int m_Res;
try
{
IntPtr ptrStat;
IntPtr ptrErr;
int dwCount = ItemHANDLES.Length;
IOPCSyncIO m_pISync = (IOPCSyncIO)pUnknown;
m_Res = m_pISync.Read(OPCDATASOURCE.OPC_DS_DEVICE, dwCount, ItemHANDLES, out ptrStat, out ptrErr);
if (m_Res < 0)
{
throw new Exception("Server: Read Items failed hr= " + m_Res.ToString());
}
int runErr = (int)ptrErr;
int runStat = (int)ptrStat;
if ((runErr == 0) || (runStat == 0))
{
throw new Exception("Server: Read Items failed hr= " + unchecked ((int)0x80004004).ToString());
}
returnValue = new MyVariant[dwCount];
for (int i = 0; i < dwCount; i++)
{
int error = Marshal.ReadInt32((IntPtr)runErr);
runErr += 4;
if (error >= 0)
{
object o = Marshal.GetObjectForNativeVariant((IntPtr)(runStat + 16));
returnValue[i] = new MyVariant(o, arrayType[i]);
}
else
{
returnValue[i] = new MyVariant(null, VarEnum.VT_EMPTY);
//parent.PrintMessage("Server: Read Item " + id[i] + " is failed hr =" + error, MessageStyl.error);
}
runStat += 32;
}
Marshal.FreeCoTaskMem(ptrStat);
Marshal.FreeCoTaskMem(ptrErr);
}
catch (Exception e)
{
//parent.PrintMessage(e.Message, MessageStyl.error);
throw e;
}
}
public void SetValue(string str, VarEnum t)
{
this.type = t;
try
{
switch (t)
{
case VarEnum.VT_EMPTY:
this.value = 0;
break;
case VarEnum.VT_BOOL:
value = Convert.ToBoolean(str);
break;
case VarEnum.VT_UI1:
value = Convert.ToByte(str);
break;
case VarEnum.VT_I1:
value = Convert.ToChar(str);
break;
case VarEnum.VT_I2:
value = Convert.ToInt16(str);
break;
case VarEnum.VT_UI4:
value = Convert.ToInt32(str);
break;
case VarEnum.VT_I4:
value = Convert.ToInt32(str);
break;
case VarEnum.VT_DECIMAL:
value = Convert.ToDecimal(str);
break;
case VarEnum.VT_R4:
value = Convert.ToSingle(str);
break;
case VarEnum.VT_R8:
value = Convert.ToDouble(str);
break;
//if variant=
case VarEnum.VT_VARIANT:
value = new MyVariant(str, t);
break;
case VarEnum.VT_BSTR:
str = str.Replace("\"", "");
str = str.Replace("\'", "");
value = str;
break;
case VarEnum.VT_UI1 | VarEnum.VT_ARRAY:
value = null;
break;
case VarEnum.VT_BSTR | VarEnum.VT_ARRAY:
value = null;
break;
case VarEnum.VT_I4 | VarEnum.VT_ARRAY:
value = null;
break;
case VarEnum.VT_BOOL | VarEnum.VT_ARRAY:
value = null;
break;
case VarEnum.VT_VARIANT | VarEnum.VT_ARRAY:
value = null;
break;
default:
{
this.value = null;
throw new Exception("Unknow type: " + t.ToString());
}
}
}
catch (Exception e)
{
throw new Exception("Bad type conversion: (" + e.Message + ")");
}
}