public static OpcDaItemProperty[] LookupItemIDs(this OpcItemProperties opcItemProperties, string itemId,
IList <int> propertyIds)
{
HRESULT[] ppErrors;
var ppszNewItemIDs = opcItemProperties.LookupItemIDs(itemId, propertyIds.ToArray(), out ppErrors);
var properties = new OpcDaItemProperty[propertyIds.Count];
for (var i = 0; i < propertyIds.Count; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = propertyIds[i],
ItemId = ppszNewItemIDs[i],
ErrorId = ppErrors[i]
};
properties[i] = property;
}
return(properties);
}
public static OpcDaItemProperties QueryAvailableProperties(this OpcItemProperties opcItemProperties,
string itemId)
{
string[] ppDescriptions;
VarEnum[] ppvtDataTypes;
var pdwPropertyIDs = opcItemProperties.QueryAvailableProperties(itemId, out ppDescriptions,
out ppvtDataTypes);
var props = new OpcDaItemProperties {Properties = new OpcDaItemProperty[pdwPropertyIDs.Length]};
for (var i = 0; i < pdwPropertyIDs.Length; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = pdwPropertyIDs[i],
Description = ppDescriptions[i],
DataType = TypeConverter.FromVarEnum(ppvtDataTypes[i])
};
props.Properties[i] = property;
}
return props;
}
public static OpcDaItemProperty[] GetItemProperties(this OpcItemProperties opcItemProperties, string itemId,
IList<int> propertyIds)
{
HRESULT[] ppErrors;
var ppvData = opcItemProperties.GetItemProperties(itemId, propertyIds.ToArray(), out ppErrors);
var properties = new OpcDaItemProperty[ppvData.Length];
for (var i = 0; i < properties.Length; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = propertyIds[i],
Value = ppvData[i],
ErrorId = ppErrors[i]
};
properties[i] = property;
}
return properties;
}
public static OpcDaItemProperty[] GetItemProperties(this OpcItemProperties opcItemProperties, string itemId,
IList <int> propertyIds)
{
HRESULT[] ppErrors;
var ppvData = opcItemProperties.GetItemProperties(itemId, propertyIds.ToArray(), out ppErrors);
var properties = new OpcDaItemProperty[ppvData.Length];
for (var i = 0; i < properties.Length; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = propertyIds[i],
Value = ppvData[i],
ErrorId = ppErrors[i]
};
properties[i] = property;
}
return(properties);
}
public static OpcDaItemProperties QueryAvailableProperties(this OpcItemProperties opcItemProperties,
string itemId)
{
string[] ppDescriptions;
VarEnum[] ppvtDataTypes;
var pdwPropertyIDs = opcItemProperties.QueryAvailableProperties(itemId, out ppDescriptions,
out ppvtDataTypes);
var props = new OpcDaItemProperties {
Properties = new OpcDaItemProperty[pdwPropertyIDs.Length]
};
for (var i = 0; i < pdwPropertyIDs.Length; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = pdwPropertyIDs[i],
Description = ppDescriptions[i],
DataType = TypeConverter.FromVarEnum(ppvtDataTypes[i])
};
props.Properties[i] = property;
}
return(props);
}
private static OpcDaItemProperty[] ReadItemProperties(ref IntPtr pItemProperties, int dwNumProperties)
{
var result = new OpcDaItemProperty[dwNumProperties];
IntPtr current = pItemProperties;
for (int i = 0; i < dwNumProperties; i++)
{
var opcitemproperty = (OPCITEMPROPERTY)Marshal.PtrToStructure(current, typeof(OPCITEMPROPERTY));
result[i] = new OpcDaItemProperty
{
DataType = TypeConverter.FromVarEnum((VarEnum)opcitemproperty.vtDataType),
PropertyId = opcitemproperty.dwPropertyID,
ItemId = opcitemproperty.szItemID,
Description = opcitemproperty.szDescription,
Value = opcitemproperty.vValue,
ErrorId = opcitemproperty.hrErrorID
};
Marshal.DestroyStructure(current, typeof(OPCITEMPROPERTY));
current += Marshal.SizeOf(typeof(OPCITEMPROPERTY));
}
Marshal.FreeCoTaskMem(pItemProperties);
pItemProperties = IntPtr.Zero;
return(result);
}
public static OpcDaItemProperty[] LookupItemIDs(this OpcItemProperties opcItemProperties, string itemId,
IList<int> propertyIds)
{
HRESULT[] ppErrors;
var ppszNewItemIDs = opcItemProperties.LookupItemIDs(itemId, propertyIds.ToArray(), out ppErrors);
var properties = new OpcDaItemProperty[propertyIds.Count];
for (var i = 0; i < propertyIds.Count; i++)
{
var property = new OpcDaItemProperty
{
PropertyId = propertyIds[i],
ItemId = ppszNewItemIDs[i],
ErrorId = ppErrors[i]
};
properties[i] = property;
}
return properties;
}
private static OpcDaItemProperty[] ReadItemProperties(ref IntPtr pItemProperties, int dwNumProperties)
{
var result = new OpcDaItemProperty[dwNumProperties];
IntPtr current = pItemProperties;
for (int i = 0; i < dwNumProperties; i++)
{
var opcitemproperty = (OPCITEMPROPERTY) Marshal.PtrToStructure(current, typeof (OPCITEMPROPERTY));
result[i] = new OpcDaItemProperty
{
DataType = TypeConverter.FromVarEnum((VarEnum) opcitemproperty.vtDataType),
PropertyId = opcitemproperty.dwPropertyID,
ItemId = opcitemproperty.szItemID,
Description = opcitemproperty.szDescription,
Value = opcitemproperty.vValue,
ErrorId = opcitemproperty.hrErrorID
};
Marshal.DestroyStructure(current, typeof (OPCITEMPROPERTY));
current += Marshal.SizeOf(typeof (OPCITEMPROPERTY));
}
Marshal.FreeCoTaskMem(pItemProperties);
pItemProperties = IntPtr.Zero;
return result;
}
