How to bind data to treeview with ID and parent id?

Question

Rajanikant Hawaldar · Answer

Hi Shwetha , try this work great,done using C# windaw application, create sample like this, debug line by line then you will understand. using System.Collections.Generic; using System.Data; using System.Linq; using System.Windows.Forms; namespace TreeviewBindingWithID { public partial class Form1 : Form { public Form1() { InitializeComponent(); FillTreeView(); } private class ItemInfo { public int ID; public int ParentID; public string Name; } private void FillTreeView() { var items = new List () { new ItemInfo(){ID = 1, ParentID = 4, Name = "A" }, new ItemInfo(){ID = 2, ParentID = 1, Name = "A1" }, new ItemInfo(){ID = 3, ParentID = 0, Name = "B" }, new ItemInfo(){ID = 4, ParentID = 0, Name = "C" }, new ItemInfo(){ID = 5, ParentID = 1, Name = "A2" }, new ItemInfo(){ID = 6, ParentID = 3, Name = "B1" }, }; FillNode(items, null ); } private void FillNode(List items, TreeNode node) { var parentID = node != null ? ( int )node.Tag : 0; var nodesCollection = node != null ? node.Nodes : treeView1.Nodes; foreach (var item in items.Where(i => i.ParentID == parentID)) { var newNode = nodesCollection.Add(item.Name, item.Name); newNode.Tag = item.ID; FillNode(items, newNode); } } } }