C# TreeView Traversing

Introduction

TreeView in C# is a great control. TreeView can be used to build Hierarchical Menus. I was involved in a project where i had to make use of TreeView quite heavily and as a result i wrote some code myself to Build the TreeView dynamically (database driven). Here i present the TreeView traversal operation.

Here's a snapshot of the Populated TreeView.

Download sourcecode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Here is the code:

class TVIEW

//1- Create a TreeView
TreeView treeview = new TreeView();
 
//2- Populate the TreeView with Data
//populateTreeView();
//3- Now You can visit each and every node of this treeview whenever you require
TVIEW t1 = new TVIEW();
t1.TraverseTreeView(treeview);

 

private void TraverseTreeView(TreeView tview)


{
//Create a TreeNode to hold the Parent Node
TreeNode temp = new TreeNode();

//Loop through the Parent Nodes
for(int k=0; k<tview.Nodes.Count; k++) 
{
//Store the Parent Node in temp
temp = tview.Nodes[k];

//Display the Text of the Parent Node i.e. temp
MessageBox.Show(temp.Text);

//Now Loop through each of the child nodes in this parent node i.e.temp
for (int i = 0; i < temp.Nodes.Count; i++)
visitChildNodes(temp.Nodes[i]); //send every child to the function for further traversal
} 

 

private void visitChildNodes(TreeNode node)

{
//Display the Text of the node
MessageBox.Show(node.Text); 
//Loop Through this node and its childs recursively
for (int j = 0; j < node.Nodes.Count; j++)
visitChildNodes(node.Nodes[j]);
}