/// <summary>
/// Fetches the specified properties for an item.
/// </summary>
private Opc.Da.ItemProperty[] GetProperties(
CacheItem item,
PropertyID[] propertyIDs,
bool returnValues)
{
// check for trivial case.
if (item == null)
{
return(null);
}
// fetch properties.
ItemPropertyCollection properties = null;
if (propertyIDs == null)
{
properties = item.GetAvailableProperties(returnValues);
}
else
{
properties = item.GetAvailableProperties(propertyIDs, returnValues);
}
// convert collection to array.
return((Opc.Da.ItemProperty[])properties.ToArray(typeof(Opc.Da.ItemProperty)));
}
private void GetProperties(System.Windows.Forms.TreeNode node)
{
try
{
Opc.Da.Server server = this.FindServer(node);
BrowseElement browseElement = null;
if (node.Tag != null && node.Tag.GetType() == typeof(BrowseElement))
{
browseElement = (BrowseElement)node.Tag;
}
if (browseElement.IsItem)
{
node.Nodes.Clear();
ItemIdentifier itemIdentifier = new ItemIdentifier(browseElement.ItemPath, browseElement.ItemName);
ItemPropertyCollection[] properties = server.GetProperties(new ItemIdentifier[]
{
itemIdentifier
}, this.m_filters.PropertyIDs, this.m_filters.ReturnPropertyValues);
if (properties != null)
{
ItemPropertyCollection[] array = properties;
for (int i = 0; i < array.Length; i++)
{
ItemPropertyCollection itemPropertyCollection = array[i];
foreach (ItemProperty property in itemPropertyCollection)
{
this.AddItemProperty(node, property);
}
browseElement.Properties = (ItemProperty[])itemPropertyCollection.ToArray(typeof(ItemProperty));
}
}
node.Expand();
if (this.ElementSelected != null)
{
this.ElementSelected(browseElement);
}
}
}
catch (System.Exception ex)
{
System.Windows.Forms.MessageBox.Show(ex.Message);
}
}