See my code below. When I try to set SetValue on the edge, I get an error at this.Controls.Add(host); I tried, setting all different kinds of value, int, doubles, hex, low or high value, nothing works, for no ReservedMetadataKey.
private void cmdGraph_Click(object sender, EventArgs e)
NodeXLControl ctx = new NodeXLControl();
ctx.Width = 1024;
ctx.Height = 786;
var vertices = from vt in db.vertices select vt;
var edges = from edg in db.edges select edg;
prgGraph.Maximum = vertices.Count() + edges.Count();
prgGraph.Value = 0;
foreach(vertice vt in vertices)
Vertex v1 = new Vertex();
v1.Name = vt.email;
int maxwidth = (from ew in db.edges orderby ew.count descending select ew.count).First();
GraphDrawer gd = ctx.GraphDrawer;
gd.EdgeDrawer.Width = 1;
foreach (edge ed in edges)
var edx = ed;
bool res1 = ctx.Graph.Vertices.Find(edx.vertice.email, out v1);
bool res2 = ctx.Graph.Vertices.Find(edx.vertice1.email, out v2);
Edge e1 = new Edge(v1, v2, true);
e1.SetValue(ReservedMetadataKeys.PerEdgeWidth, edx.count / maxwidth * 10);
ElementHost host = new ElementHost();
host.Width = 1024;
host.Height = 786;
host.Top = 100;
host.Child = ctx;
Error: Assertion Failed. at GraphVertexEdgeBase.GetValue
What can be wrong?
Fixed. Used the sourcecode to find out what was wrong. Had to be single value for the width and byte for the alpha. Also my width was under 1 for some values.
Feb 7, 2010 at 6:41 PM
Edited Feb 7, 2010 at 6:43 PM
Please see the ReservedMetadataKeys topic in the NodeXLApi.chm help file, which documents the required type for each key. For example, the remarks for
ReservedMetadataKeys.PerEdgeWidth state that "The key's value is a Single between EdgeDrawer.MinimumWidth and EdgeDrawer.MaximumWidth."
You do not need to look in the source code to determine how to use a particular key.