How to set icons for the windows forms treeview control ?

Question

I use imageList to store icons and I assign imageList to treeView, I use treeView1_DrawNode to change icon for treeView but this function does not run. See my photo and code below. namespace TreeView { public partial class Form1 : Form { public Form1() { InitializeComponent(); treeView1.ImageList = imageList1; this .treeView1.DrawNode += new System.Windows.Forms.DrawTreeNodeEventHandler( this .treeView1_DrawNode); dt = CreateTable(10); CreateTreeView(dt, treeView1, true ); } DataTable dt = new DataTable(); ... //My code private void treeView1_DrawNode( object sender, DrawTreeNodeEventArgs e) { if (e.Node.IsExpanded || e.Node.Nodes.Count treeView1.ImageIndex = 0; else treeView1.ImageIndex = 1; } } http://www.mediafire.com/file/iz4mvxfu9o0h863/treeView01.jpg Why is the treeView1_DrawNode(...) function not running? How to change my treeView icons instead of +,- like a windows explorer treeview in win forms?

Dong Lam Trien · Answer

The documents you sent me have read but I have not found the documents I need, I want to change the image of the first and last nodes (the first one is called "All" and the last one is "Trash can") but I have not Changeable, I want to design treeView as an attached image http://www.mediafire.com/file/47pnxx5ocau91ih/treeView06a.jpg

Jignesh Kumar · Answer

Hi, Please use this link which will help you, http://msdn.microsoft.com/en-us/library/system.windows.forms.treeview.imageindex.aspx

Vinay Singh · Answer

Please check the link https://docs.microsoft.com/en-us/dotnet/framework/winforms/controls/how-to-set-icons-for-the-windows-forms-treeview-control https://stackoverflow.com/questions/13782649/setting-images-from-icons-in-a-treeview

Rajanikant Hawaldar · Answer

Check these links http://vbcity.com/blogs/xtab/archive/2013/08/27/windows-forms-adding-system-icons-to-treeview-nodes.aspx https://www.codeproject.com/Articles/7884/Data-Binding-TreeView-in-C https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.treeview.imagelist?redirectedfrom=MSDN&view=netframework-4.8#System_Windows_Forms_TreeView_ImageList https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.treeview.imageindex?redirectedfrom=MSDN&view=netframework-4.8#System_Windows_Forms_TreeView_ImageIndex https://stackoverflow.com/questions/13782649/setting-images-from-icons-in-a-treeview