Hello,
          I am working on winforms and using a flowcharter from the samples in c#, I want to restrict specific shape connectivity like in the image url given below i want to restrict the connectivity of shape A and shape C how can i do that.

https://imagebin.ca/v/3RkcP2F80Wof

The code from which i am getting images right now is :

   // nodeListView1
            //
            this.nodeListView1.Location = new System.Drawing.Point(-3, 210);
            this.nodeListView1.Name = "nodeListView1";
            this.nodeListView1.Size = new System.Drawing.Size(200, 343);
            this.nodeListView1.TabIndex = 0;
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap1.bmp")
            }, "A");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap2.bmp")
            }, "B");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap3.bmp")
            }, "C");

Thanks

thanks slavcho ,it is similar to what i need but actually what i want is, like shape C can be connected to shape A but not with shape B,so how can i apply condition with in the given code i post before.

With this code below which is in Mainform.Designer.cs where to apply the changes ?i even can't initialize the function its giving me errors

   // nodeListView1
            //
            this.nodeListView1.Location = new System.Drawing.Point(-3, 210);
            this.nodeListView1.Name = "nodeListView1";
            this.nodeListView1.Size = new System.Drawing.Size(200, 343);
            this.nodeListView1.TabIndex = 0;
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap1.bmp")
            }, "A");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap2.bmp")
            }, "B");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap3.bmp")
            }, "C");

I am not that expert so can you define it more please,I dont have the indexing of nodes here, just the label A,B,C so how to differentiate between nodes if i want to apply condition for restricting connection among nodes.Thanks

Thanks slavcho for detailed description. This is now what i am using but still i am able to connect both nodes...how to stop them from connecting

private void diagram_LinkCreating(object sender, LinkValidationEventArgs e)
{
diagram.LinkCreating += diagram_LinkCreating;
if ("A".Equals(e.Origin.Tag) && "B".Equals(e.Destination.Tag))
{
e.Cancel = true;

}
}

This is how i am getting the images ,you talking about these tags(A,B,C)?

   // nodeListView1
            //
            this.nodeListView1.Location = new System.Drawing.Point(-3, 210);
            this.nodeListView1.Name = "nodeListView1";
            this.nodeListView1.Size = new System.Drawing.Size(200, 343);
            this.nodeListView1.TabIndex = 0;
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap1.bmp")
            }, "A");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap2.bmp")
            }, "B");
            this.nodeListView1.AddNode(new ShapeNode
            {
                Transparent = true,
                Image = Image.FromFile(@"C:/Imgs/bitmap3.bmp")
            }, "C");

Slavcho one thing more if you can tell me, how to limit links for a specific node within this code, like i want Node A to create only 2 links and accept only 1 link. Thanks

  if ("A".Equals(e.Origin.Tag) )
            {
                e.Cancel = true;

            }

Check the Count property of nodes' OutgoingLinks and IncomingLinks collections. Keeping in mind that the currently drawn link is not yet there.

Regards,
Slavcho