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c#graphvizquickgraph
LordCat
LordCat

Reputation: 518

C# Drawing a graph using QuickGraph and GraphViz

I hope I don't appear lazy, but I am really struggling to draw a graph using QuickGraph and GraphViz, since I can't appear to find much documentation online. I am quite new to C# interfaces, so am finding them quite confusing as well. Would anybody be able to give me a simple working example, or direct me so some good examples and documentation?

Thank you.

Upvotes: 2

Views: 6544

Answers (1)

clx
clx

Reputation: 824

The Quickgraph-to-Graphviz-export can not write files, so you need to implement IDotEngine which handles the file writing.

public class FileDotEngine : IDotEngine
{    
    public string Run(GraphvizImageType imageType, string dot, string outputFileName)
    {
        using (StreamWriter writer = new StreamWriter(outputFileName))
        {
            writer.Write(dot);    
        }

        return System.IO.Path.GetFileName(outputFileName);
    }
}

Then you can call the Graphviz Algorithm like this:

GraphvizAlgorithm<TNode, TEdge> graphviz = new GraphvizAlgorithm<TNode, TEdge>(this.Graph);
graphviz.FormatVertex += (sender, args) => args.VertexFormatter.Comment = args.Vertex.Label;
graphviz.FormatEdge += (sender, args) => { args.EdgeFormatter.Label.Value = args.Edge.Label; };

graphviz.Generate(new FileDotEngine(), filePath);

The created dotfile can be passed to graphviz. See Graphviz Dot usage here in the dotguide

Upvotes: 2

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