public void BeginEdit()
{
try
{
_scope = _modelItem.BeginEdit();
_session = new UaSession {
EndpointUrl = Session.EndpointUrl
};
if (_session != null)
{
try
{
NamespaceItems.Clear();
var root = new ReferenceDescriptionViewModel(new ReferenceDescription {
DisplayName = "Objects", NodeId = new NodeId(Objects.ObjectsFolder, 0)
}, null, LoadChildren);
NamespaceItems.Add(root);
root.IsExpanded = true;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
public ModelItem AddMethod(ReferenceDescriptionViewModel vm)
{
if (_session != null && _session.Connected)
{
var name = string.Concat(vm.Parent.DisplayName, vm.DisplayName, "Method").Replace(" ", "");
var regex = new Regex(@"[^\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Nl}\p{Mn}\p{Mc}\p{Cf}\p{Pc}\p{Lm}]");
name = regex.Replace(name, "_");
if (!char.IsLetter(name, 0))
{
name = string.Concat("_", name);
}
var list2 = Methods.Select(mi => (string)mi.Properties["DisplayName"].ComputedValue).ToList();
while (list2.Contains(name))
{
name = string.Concat(name, "_2");
}
var type = typeof(bool);
var item = ModelFactory.CreateItem(_modelItem.Context, new UaItem {
DisplayName = name, StartNodeId = ExpandedNodeId.ToNodeId(vm.Parent.NodeId, _session.NamespaceUris), Type = type, NodeClass = vm.NodeClass, RelativePath = vm.BrowseName
});
Methods.Add(item);
return(item);
}
return(null);
}
public async Task <ModelItem> AddDataSource(ReferenceDescriptionViewModel vm)
{
if (_session != null && _session.Connected)
{
var nodeId = ExpandedNodeId.ToNodeId(vm.NodeId, _session.NamespaceUris);
var type = await _session.GetDataTypeFromNodeId(nodeId);
var name = string.Concat(vm.Parent.DisplayName, vm.DisplayName, "Source").Replace(" ", "");
var regex = new Regex(@"[^\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Nl}\p{Mn}\p{Mc}\p{Cf}\p{Pc}\p{Lm}]");
name = regex.Replace(name, "_");
if (!char.IsLetter(name, 0))
{
name = string.Concat("_", name);
}
var list2 = Properties.Select(mi => (string)mi.Properties["DisplayName"].ComputedValue).Concat(Commands.Select(mi => (string)mi.Properties["DisplayName"].ComputedValue)).Concat(DataSources.Select(mi => (string)mi.Properties["DisplayName"].ComputedValue)).ToList();
while (list2.Contains(name))
{
name = string.Concat(name, "_2");
}
var item = ModelFactory.CreateItem(_modelItem.Context, new UaItem {
DisplayName = name, StartNodeId = nodeId, Type = type, NodeClass = vm.NodeClass, CacheQueueSize = 240
});
DataSources.Add(item);
return(item);
}
return(null);
}
private async Task LoadChildren(ReferenceDescriptionViewModel viewModel)
{
if (_session == null || _session.Disposed)
{
return;
}
try
{
if (!_session.Connected)
{
await _session.ConnectAsync();
}
var browseRequest = new BrowseRequest {
NodesToBrowse = { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(viewModel.NodeId, _session.NamespaceUris), ReferenceTypeId = ReferenceTypeIds.HierarchicalReferences, ResultMask = (uint)BrowseResultMask.All, NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, BrowseDirection = BrowseDirection.Forward
} }
};
var browseResponse = await _session.BrowseAsync(browseRequest);
foreach (var description in browseResponse.Results.SelectMany(result => result.References))
{
viewModel.Children.Add(new ReferenceDescriptionViewModel(description, viewModel, LoadChildren));
await Task.Delay(50);
}
var continuationPoints = new ByteStringCollection(browseResponse.Results.Select(br => br.ContinuationPoint).Where(cp => null != cp));
while (continuationPoints.Count > 0)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = continuationPoints, ReleaseContinuationPoints = false
};
var browseNextResponse = await _session.BrowseNextAsync(browseNextRequest);
foreach (var description in browseNextResponse.Results.SelectMany(result => result.References))
{
viewModel.Children.Add(new ReferenceDescriptionViewModel(description, viewModel, LoadChildren));
await Task.Delay(50);
}
continuationPoints = new ByteStringCollection(browseNextResponse.Results.Select(br => br.ContinuationPoint).Where(cp => null != cp));
}
}
catch (OperationCanceledException)
{
}
}
