Question

我开始在C＃中使用DEX Graph数据库。到目前为止，我已经设法运行简单的示例，但无法找到如何导出图形。

我想将图形导出为Graphviz格式，以便与其他可视化工具一起显示。有没有人知道任何可以找到图表导出示例的好资源，或者您是否已经设法导出图表并可以共享代码？

我非常感谢你的帮助。

Answer 1

有一个简单的默认导出器可以这样使用：

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

但是为了获得更好的输出，您可能需要编写扩展ExportManager类的自己的导出器。

如果您遇到问题，可以在公司forum询问。

Answer 2

要制作自己的导出器，您应该执行以下操作：

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;
        }
    }

我担心对于graphviz，导出器只接受更改标签。对于颜色和形状，...也许你可以考虑使用ygraphml输出？

使用C＃的DEX图形数据库：图形导出是否有任何代码示例？

2 个答案: