C # Perfect class for checkbox Selection in winform Treeview

Public   Static   Class Treeviewcheck { /// <Summary>      /// Series node checked attribute Control      /// </Summary>      /// <Param name = "E"> </param>      Public   Static   Void Checkcontrol (treevieweventargs e ){ If (E. Action! = Treeviewaction. Unknown ){ If (E. node! = Null &&! Convert. isdbnull (E. node) {checkparentnode (E. node ); If (E. node. nodes. Count> 0) {checkallchildnodes (E. node, E. node. Checked );}}}} # Region Private Method // Change the status of all subnodes      Private   Static   Void Checkallchildnodes (treenode Pn, Bool Ischecked ){ Foreach (Treenode TN In Pn. nodes) {tn. Checked = ischecked; If (TN. nodes. Count> 0) {checkallchildnodes (TN, ischecked );}}} // Change the selected status of the parent node. this parameter is used only when all child nodes are not selected. You can modify the selected status as needed.      Private   Static   Void Checkparentnode (treenode curnode ){ Bool Bchecked = False ; If (Curnode. parent! = Null ){ Foreach (Treenode Node In Curnode. Parent. nodes ){ If (Node. Checked) {bchecked = True ; Break ;}} If (Bchecked) {curnode. Parent. Checked = True ; Checkparentnode (curnode. Parent );} Else {Curnode. Parent. Checked = False ; Checkparentnode (curnode. Parent );}}} # Endregion }

Call Method: In the aftercheck event of Treeview

Private void treeviewappsaftercheck (Object sender, treevieweventargs E)

{

Treeviewcheck. checkcontrol (E)

}