private async Task LockObject() { //selectedItem.isModified = true; SfDiagram diagram = Parent.DiagramContent.Diagram; for (var i = 0; i < diagram.SelectedItems.Nodes.Count; i++) { var node = diagram.SelectedItems.Nodes[i]; if (node.Constraints.HasFlag(NodeConstraints.Drag)) { node.Constraints = NodeConstraints.PointerEvents | NodeConstraints.Select; } else { node.Constraints = NodeConstraints.Default; } } for (var j = 0; j < diagram.SelectedItems.Connectors.Count; j++) { var connector = diagram.SelectedItems.Connectors[j]; if (connector.Constraints.HasFlag(ConnectorConstraints.Drag)) { connector.Constraints = ConnectorConstraints.PointerEvents | ConnectorConstraints.Select; } else { connector.Constraints = ConnectorConstraints.Default; } } await diagram.DataBind().ConfigureAwait(true); }