/// <summary>
/// Get OPC tree for selected branch
/// </summary>
/// <param name="itemId">Parent level element</param>
/// <returns>Collection of OPC children</returns>
public ObservableCollection <mTreeNode> GetTree(Opc.ItemIdentifier itemId)
{
ObservableCollection <mTreeNode> tree = new ObservableCollection <mTreeNode>();
if (isConnected)
{
Opc.Da.BrowsePosition position;
Opc.Da.BrowseFilters filters = new Opc.Da.BrowseFilters()
{
BrowseFilter = Opc.Da.browseFilter.branch
};
Opc.Da.BrowseElement[] elements = server.Browse(itemId, filters, out position);
if (elements != null)
{
foreach (Opc.Da.BrowseElement el in elements)
{
mTreeNode node = new mTreeNode();
node.Description = el.Name;
node.Name = el.ItemName;
node.Path = el.ItemPath;
if (el.HasChildren)
{
var childItemId = new Opc.ItemIdentifier(el.ItemPath, el.ItemName);
node.Nodes = new ObservableCollection <mTreeNode>(GetTree(childItemId));
}
tree.Add(node);
}
}
}
RefreshServerStatus();
return(tree);
}
/// <summary>
/// Get list of OPC tags for selected group/branch
/// </summary>
/// <param name="path">Root item/leaf path</param>
/// <param name="name">Root item/leaf name</param>
/// <returns>Collection of tags, names and path only, not values</returns>
public ObservableCollection <mItem> GetTags(string path, string name)
{
ObservableCollection <mItem> tags = new ObservableCollection <mItem>();
var itemId = new Opc.ItemIdentifier(path, name);
Opc.Da.BrowsePosition position;
Opc.Da.BrowseFilters filters = new Opc.Da.BrowseFilters()
{
BrowseFilter = Opc.Da.browseFilter.item
};
Opc.Da.BrowseElement[] elements = server.Browse(itemId, filters, out position);
if (elements != null)
{
foreach (Opc.Da.BrowseElement el in elements)
{
mItem tag = new mItem(el.ItemName, el.ItemPath);
tags.Add(tag);
}
}
return(tags);
}
