public AdjGraphNode <K> BreadthFirstSearch(AdjGraphNode <K> startNode, K searchNode, Guid visitId)
{
Queue <AdjGraphNode <K> > q = new Queue <AdjGraphNode <K> >();
startNode.visitId = visitId;
q.Enqueue(startNode);
while (q.Count > 0)
{
AdjGraphNode <K> n = q.Dequeue();
Console.WriteLine(n.data.ToString());
if (n.data.Equals(searchNode))
{
return(n);
}
foreach (AdjGraphNode <K> adj in n.neighbours)
{
if (adj.visitId != visitId)
{
adj.visitId = visitId;
q.Enqueue(adj);
}
}
}
return(null);
}
private List <K> BreadthFirstTraversal(Guid visitId)
{
List <K> BFList = new List <K>();
Queue <AdjGraphNode <K> > q = new Queue <AdjGraphNode <K> >();
startNode.visitId = visitId;
q.Enqueue(startNode);
while (q.Count > 0)
{
AdjGraphNode <K> n = q.Dequeue();
BFList.Add(n.data);
foreach (AdjGraphNode <K> adj in n.neighbours)
{
if (adj.visitId != visitId)
{
adj.visitId = visitId;
q.Enqueue(adj);
}
}
}
return(BFList);
}
public override bool Equals(Object obj)
{
// Check for null values and compare run-time types.
if (obj == null || GetType() != obj.GetType())
{
return(false);
}
AdjGraphNode <T> node2 = (AdjGraphNode <T>)obj;
return(Comparer <T> .Default.Compare(this.data, node2.data) == 0);
}
/// <summary>
/// Finds if there is a path between A and B using DFS
/// </summary>
/// <param name="A"></param>
/// <param name="B"></param>
/// <returns></returns>
public bool PathBetweenABExist(K a, K b, Guid visitId)
{
AdjGraphNode <K> nodeA = BreadthFirstSearch(this.startNode, a, Guid.NewGuid());
if (nodeA != null)
{
AdjGraphNode <K> nodeB = BreadthFirstSearch(nodeA, b, Guid.NewGuid());
if (nodeB != null)
{
return(true);
}
}
return(false);
}
public List <K> DepthFirstTraversal(AdjGraphNode <K> node, Guid visitId, List <K> list)
{
if (node.visitId == visitId)
{
return(list);
}
node.visitId = visitId;
list.Add(node.data);
foreach (AdjGraphNode <K> n in node.neighbours)
{
list = DepthFirstTraversal(n, visitId, list);
}
return(list);
}
public void AppendNodes(K nodeA, K nodeB, Guid visitId)
{
AdjGraphNode <K> a = BreadthFirstSearch(nodeA, Guid.NewGuid());
if (a != null)
{
AdjGraphNode <K> b = BreadthFirstSearch(nodeB, Guid.NewGuid());
if (b != null)
{
a.neighbours.Add(b);
}
else
{
b = new AdjGraphNode <K>(nodeB);
a.neighbours.Add(b);
count++;
}
}
}
static void Main(string[] args)
{
AdjGraphNode <string> node1 = new AdjGraphNode <string>("VP and Ellesemere");
AdjGraphNode <string> node2 = new AdjGraphNode <string>("Markham and Ellesemere");
AdjGraphNode <string> node3 = new AdjGraphNode <string>("Markam and Eglinton");
AdjGraphNode <string> node4 = new AdjGraphNode <string>("VP and Eglington");
AdjGraphNode <string> node5 = new AdjGraphNode <string>("VP and Kingston Rd");
AdjGraphNode <string> node6 = new AdjGraphNode <string>("Kingston Rd and Eglinton");
node1.neighbours.Add(node4);
node1.neighbours.Add(node2);
node2.neighbours.Add(node3);
node4.neighbours.Add(node3);
node4.neighbours.Add(node5);
node5.neighbours.Add(node6);
node6.neighbours.Add(node3);
//node1.DepthFirstTraversal();
node1.BreadthFirstTraversal();
//342, 206, 444, 523, 607, 301, 142, 183, 102, 157, 149
BinaryTree <int> tree = new BinaryTree <int>(342);
tree.Insert(206);
tree.Insert(444);
tree.Insert(523);
tree.Insert(607);
tree.Insert(301);
tree.Insert(142);
tree.Insert(183);
tree.Insert(102);
tree.Insert(157);
tree.Insert(149);
tree.BreathFirstTraversal();
}
public AdjGraph(K data)
{
startNode = new AdjGraphNode <K>(data);
count++;
}