How to find the associate nodes by node ports and connector's target?

[Nathaniel Chen]

Hi,

For example,

I have two Node(NodeViewModel).

A Node and B Node, connected each by a Connector

A Node have a out port(NodePortViewModel) and the Connector started there and ended in B Node input port.

Today, I want to start from A Node and follow the Connector to find B Node.

I tried the following method but no luck :(

step 1:

(A_node.Ports as ObservableCollection)[0].Info 

The "Info" Object's object type is NodePortWrapper, and this class is internal that means I can't casting "Info" as NodePortWrapper and access it.

step 2:

But in the runtime, I using Visual Studio's tracking feature find in the "Info", it has "OutConnectors" property.

step 3:

This OutConnectors property seen like some collection, and the ConnectorViewModel able to see this connector will targeting what node it point to(TargetNode property)

step 4:

So I try reflection it by using GetType().GetProperty().GetValue(). 

But here is question, the "OutConnectors" property's type is System.Linq.Enumerable.WhereSelectListIterator

It can't casting in the code, for example:

var foo = (A_node.Ports as ObservableCollection)[0].Info.GetType().GetProperty("OutConnectors").GetValue((A_node.Ports as ObservableCollection)[0].Info, null);

object foo can't convert to List or other things.

(foo's type is System.Linq.Enumerable.WhereSelectListIterator) 

And this code only able run at runtime:

((Enumerable.WhereSelectListIterator)(A_node.Ports as ObservableCollection)[0].Info.GetType().GetProperty("OutConnectors").GetValue((A_node.Ports as ObservableCollection)[0].Info, null)).ToList()[0];

The result will seen the connector between A and B Node.

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I started doubt is I'm in the right way to get my information?

Or there is better way to get I want?

Thanks!

[Karkuvel Rajan Shanmugavel]

Hi Nathaniel, 

 

 

To get associated nodes and connector of a Node, please cast Info as INodeInfo and use following properties. 

 

Property	Explanation
InConnectors	To get the incoming connections.
OutConnectors	To get the outgoing connection.
InOutConnectors	To get all the connectors connected.
InNeighbors	To get the parent Nodes connected with a Connector.
OutNeighbors	To get the child Nodes connected with a Connector.
Neighbors	To get all the Nodes connected with a Connector.

 

For more details we have provided the CodeExample below. 

 

Code Example: 

 

// Get the first selected Node 

 

SelectorViewModel select = diag.SelectedItems as SelectorViewModel; 

INode node = (select.Nodes as IEnumerable<object>).FirstOrDefault() as INode; 

 

//Iterate through each Children of Selected Node 

 

foreach(var nodes in (node.Info as INodeInfo).OutNeighbors) 

{ 

     //Do something 

}     

  

Regards, 

Karkuvel Rajan.S 

[Nathaniel Chen]

Thanks for your replied!

I know how to access those properties now :)

[Karkuvel Rajan Shanmugavel]

Hi Nathaniel, 

 

Thanks, please let us know whether you need any other assistance. 

 

Regards, 

Karkuvel Rajan.S