How to visualize DEX graph database? (export) with .Net

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DEX graphdb

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Feb 14, 2013, 8:46:45 AM2/14/13
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In order to visualize a DEX graph database you should export the database to a format such as graphml, that is able to be visualized. DEX also supports graphviz.

To export the graph you should add this code in your application:

DefaultExport exp = new DefaultExport();
g.Export("exported.gv", ExportType.Graphviz, exp);

One or other export method depending on the type you wish to export it to.

This would use the default exporter, to make your own:

public class MyExport : ExportManager
    {
        private Graph g = null;

        public MyExport() {
        }

        public override void Prepare(Graph graph) {
            // This method will be called once at the beginning of the export.
            // So we keep the graph being exported.
            g = graph;

        }

        public override void Release() {
            // Called once at the end of the export process.
        }

        public override bool GetGraph(GraphExport graphExport) {
            // Called once to get the Graph details (a label)
            graphExport.SetLabel("[MyExport] MyGraph");
            return true;
        }

        public override bool EnableType(int type) {
            // Will be called once for each type to allow or deny the export of
            // the nodes/edges of each type
            return true; // We enable the export of all types
        }


        public override bool GetNode(long node, NodeExport nodeExport) {
            // Called once for each node of an allowed type to get it's export definition.
            // The definition will be used if it returns true, or the default
            // node type definition from getNodeType will be used if this method
            // returns false.
            // It can set the label, shape, color, ...
            nodeExport.SetLabel("[MyExport] MyNode " + node);
            return true;
        }

        public override bool GetNodeType(int type, NodeExport nodeExport) {
            // Used to get a node type generic export definition.
            // Called once for each node only if the call to GetNode returned false.
            // It can set the label, shape, color, ...
            nodeExport.SetLabel("[MyExport] MyNodeType " + type);
            return true;
        }

        public override bool GetEdge(long edge, EdgeExport edgeExport) {
            // Called once for each edge of an allowed type to get it's export definition.
            // The definition will be used if it returns true, or the default
            // edge type definition from getEdgeType will be used if this method
            // returns false.
            // It can set the label, shape, color, ...
            edgeExport.SetLabel("[MyExport] MyEdge " + edge);
            return true;
        }

        public override bool GetEdgeType(int type, EdgeExport edgeExport) {
            // Used to get an edge type generic export definition.
            // Called once for each edge only if the call to GetEdge returned false.
            // It can set the label, shape, color, ...
            edgeExport.SetLabel("[MyExport] MyEdgeType " + type);
            return true;
        }
    }

Use your new exporter like this: 

MyExport myExp = new MyExport();
g.export("HelloDex.graphviz", ExportType.Graphviz, myExp);
g.export("HelloDex.graphml", ExportType.YGraphML, myExp);  

You can use any visual graph application that supports the formats, and import your HelloDex.graphml or HelloDex.graphviz file.
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