TreeView PopulateNodesFromClient On Demand Example

In this demo I subscribe the TreeNodeCheckChanged event to check all child nodes of a selected parent node. This treeview also loads the nodes on demand by subscribing to the TreeNodePopulate event and by setting the PopulateNodesFromClient to true, yet maintaining the event processing of the checkboxes.

Notice that I collapse each node that got unchecked and expand it if it were checked again. To best this demo, start by collapsing the Categories nodes (the second level) then check/uncheck each category at a time then press the Select/Deselect button to see a list of the selected items displayed on the right hand side.

Inventory Beverages Chai Chang Chartreuse verte Côte de Blaye Guaraná Fantástica Ipoh Coffee Lakkalikööri Laughing Lumberjack Lager Outback Lager Rhönbräu Klosterbier Sasquatch Ale Steeleye Stout Condiments Aniseed Syrup Chef Anton's Cajun Seasoning Chef Anton's Gumbo Mix Genen Shouyu Grandma's Boysenberry Spread Gula Malacca Louisiana Fiery Hot Pepper Sauce Louisiana Hot Spiced Okra Northwoods Cranberry Sauce Original Frankfurter grüne Soße Sirop d'érable Vegie-spread Confections Chocolade Gumbär Gummibärchen Maxilaku NuNuCa Nuß-Nougat-Creme Pavlova Schoggi Schokolade Scottish Longbreads Sir Rodney's Marmalade Sir Rodney's Scones Tarte au sucre Teatime Chocolate Biscuits Valkoinen suklaa Zaanse koeken Dairy Products Camembert Pierrot Flotemysost Geitost Gorgonzola Telino Gudbrandsdalsost Mascarpone Fabioli Mozzarella di Giovanni Queso Cabrales Queso Manchego La Pastora Raclette Courdavault Grains/Cereals Filo Mix Gnocchi di nonna Alice Gustaf's Knäckebröd Ravioli Angelo Singaporean Hokkien Fried Mee Tunnbröd Wimmers gute Semmelknödel Meat/Poultry Alice Mutton Mishi Kobe Niku Pâté chinois Perth Pasties Thüringer Rostbratwurst Tourtière Produce Longlife Tofu Manjimup Dried Apples Rössle Sauerkraut Tofu Uncle Bob's Organic Dried Pears Seafood Boston Crab Meat Carnarvon Tigers Escargots de Bourgogne Gravad lax Ikura Inlagd Sill Jack's New England Clam Chowder Konbu Nord-Ost Matjeshering Röd Kaviar Rogede sild Spegesild

click on this button to select checked nodes (including their children) or to deselect unchecked nodes including their children

Product ID Product Name