Use a collection

You can count, iterate, add, and remove objects in a collection.

Count objects in a collection

The
count
property of a collection is an integer variable that expresses the numberof objects in the collection. This example shows the number of child nodes in the
Panel1
object:
var myObj = Project.Current.FindObject("Panel1"); Log.Info("The node contains " + myObj.Children.Count + " nodes");

Iterate objects in a collection

You can use the
foreach
instruction to iterate objects in a collection. This example generates an information message for each child node of the
Panel1
object. The result is a list of the
BrowseName
for all child nodes. In the example, a temporary
child
variable is created, which represents a different child node in each cycle.
var myNode = Project.Current.Find("Panel1"); foreach (var child in myNode.Children) Log.Info(child.BrowseName);

Add or remove OPC UA nodes

You can use the
Add()
and
Remove()
methods expressed by collections to add or remove project nodes. See Add or remove nodes.
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