public static IList <OpcDaItemProperty> GetItemProperties(this OpcItemProperties opcItemProperties, string itemId,
IList <OpcDaItemProperty> properties)
{
HRESULT[] ppErrors;
var propertyIds = GetPropertyIds(properties);
var ppvData = opcItemProperties.GetItemProperties(itemId, propertyIds, out ppErrors);
for (var i = 0; i < properties.Count; i++)
{
var property = properties[i];
property.Value = ppvData[i];
property.ErrorId = ppErrors[i];
properties[i] = property;
}
return(properties);
}
public static IList <OpcDaItemProperty> LookupItemIDs(this OpcItemProperties opcItemProperties, string itemId,
IList <OpcDaItemProperty> properties)
{
var propertyIds = GetPropertyIds(properties);
HRESULT[] ppErrors;
var ppszNewItemIDs = opcItemProperties.LookupItemIDs(itemId, propertyIds, out ppErrors);
for (var i = 0; i < properties.Count; i++)
{
var property = properties[i];
property.ItemId = ppszNewItemIDs[i];
property.ErrorId = ppErrors[i];
}
return(properties);
}
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);
}
/// <summary>
/// Gets properties of items by specified item identifiers.
/// </summary>
/// <param name="itemIds">The item identifiers.</param>
/// <param name="propertiesQuery">The properties query.</param>
/// <returns>
/// Array of properties of items.
/// </returns>
/// <exception cref="System.InvalidOperationException">Interface IOPCItemProperties not supported.</exception>
public OpcDaItemProperties[] GetProperties(IList <string> itemIds, OpcDaPropertiesQuery propertiesQuery = null)
{
if (OpcItemProperties == null)
{
throw new InvalidOperationException("Interface IOPCItemProperties not supported.");
}
if (propertiesQuery == null)
{
propertiesQuery = new OpcDaPropertiesQuery();
}
var result = new OpcDaItemProperties[itemIds.Count];
for (var i = 0; i < result.Length; i++)
{
var itemId = itemIds[i];
try
{
OpcDaItemProperties itemProperties = OpcItemProperties.QueryAvailableProperties(itemId);
if (!propertiesQuery.AllProperties) // filter properties
{
itemProperties.IntersectProperties(propertiesQuery.PropertyIds);
}
if (propertiesQuery.ReturnValues) // read property values
{
OpcItemProperties.GetItemProperties(itemId, itemProperties);
}
OpcItemProperties.LookupItemIDs(itemId, itemProperties);
result[i] = itemProperties;
}
catch (Exception ex)
{
Log.ErrorFormat("Cannot get properties for item '{0}'.", ex, itemId);
result[i] = OpcDaItemProperties.CreateEmpty();
}
}
return(result);
}
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);
}
public static OpcDaItemProperties GetItemProperties(this OpcItemProperties opcItemProperties, string itemId,
OpcDaItemProperties properties)
{
opcItemProperties.GetItemProperties(itemId, properties.Properties);
return(properties);
}
public static OpcDaItemProperties LookupItemIDs(this OpcItemProperties opcItemProperties, string itemId,
OpcDaItemProperties properties)
{
opcItemProperties.LookupItemIDs(itemId, properties.Properties);
return(properties);
}
