I am going to load XML file using diagram but size of XML is large near about 3 MB,
Its throwing an exception

An unhandled exception of type 'System.StackOverflowException' occurred in MindFusion.Graphs.DLL

Can you tell me solution on that?

            sFileName = Request.QueryString[0];
            DiagramView1.Diagram = new Diagram();
            DiagramView1.LoadFromXml(Server.MapPath(sFileName));
            MindFusion.Diagramming.Layout.OrthogonalLayout dl = new         MindFusion.Diagramming.Layout.OrthogonalLayout();
            dl.Padding = 10;
            DiagramView1.Diagram.BackBrush = new MindFusion.Drawing.SolidBrush(Color.White);
            DiagramView1.Diagram.RoundedLinks = true;
            DiagramView1.Diagram.RoundedLinksRadius = 10;
            DiagramView1.Diagram.LinkCrossings = LinkCrossings.Arcs;
            DiagramView1.Diagram.CrossingRadius = 2;
            dl.RepeatingLinksPadding = 4;
            dl.Padding = 20;
            dl.MultipleGraphsPlacement = MindFusion.Diagramming.Layout.MultipleGraphsPlacement.MinimalArea;
            dl.Arrange(DiagramView1.Diagram);
            foreach (var li in DiagramView1.Diagram.Links)
            {
                if (li.Origin == li.Destination)
                {
                    var p = li.Origin.Bounds.Location;
                    li.ControlPoints.Clear();
                    li.ControlPoints.Add(new System.Drawing.PointF(p.X, p.Y + 2));
                    li.ControlPoints.Add(new System.Drawing.PointF(p.X - 5, p.Y + 2));
                    li.ControlPoints.Add(new System.Drawing.PointF(p.X - 5, p.Y - 5));
                    li.ControlPoints.Add(new System.Drawing.PointF(p.X + 5, p.Y - 5));
                    li.ControlPoints.Add(new System.Drawing.PointF(p.X + 5, p.Y));
                    li.UpdateFromPoints(false, true);
                }
            }
            DiagramView1.CanvasVirtualScroll = true;
            dl.Arrange(DiagramView1.Diagram);
            DiagramView1.Diagram.ResizeToFitItems(10);

Exception occurred at  dl.Arrange(DiagramView1.Diagram);

Now Exception is changed I have attached XML file with screen shot of exception details.

Please check.

Thread t = new Thread(Run, 4194304); // 4M of stack size
  t.Start();
  t.Join();
  if (loadException != null) throw loadException;

  void Run()
        {
            try
            {
              // Operation causing stack overflow
            }
            catch (Exception e)
            {
              ...
            }
        }

Here what is mean by loadException , Is it like stackOverflowexception or any thing else?

Can u tell me how to increase size of stack from IIS ? or command prompt ?

Disregard the loadException, it is specific to that example. Just replace the Arrange call with a thread calling it instead.

var dl = new OrthogonalLayout();
dl.EnableParallelism = false;
dl.MinimizeLinkBends = false;
dl.Refine = false;

Thread t = new Thread(() => dl.Arrange(diagram), 8000000);
t.Start();
t.Join(); 

Quote:


Reason is graph layout algorithms have polynomial complexity, so if you have thousands items in the diagram as in last file, it will take some billions algorithm steps to process them. For OrthogonalLayout disable MinimizeLinkBends and Refine properties as above to make it run faster, at cost of quality. If the data you are generating diagrams from does not change often, you could save the arranged diagrams as files in some cache folder and send them from there instead of arranging at each page load.

I hope that helps,
Stoyan

We do not support Viewer at this time, only full Visio.

Hi,

Set DiagramView.Behavior = DoNothing.

I hope that helps,
Stoyan