![]() In your Razor HTML-view, the base for the TreeView control is a simple tag, with an data-url attribute pointing at the method it should call to get data: Īnd finally some javascript/jquery to initialize the TreeView and add some handling, this code loads the treeview, sets the icons I would like to have (from font-awesome) and adds a click-handler which just writes out the selected node name to the console. Return Json(list, JsonRequestBehavior.AllowGet) Var items = Directory.GetFileSystemEntries(node) List.Add(new Node(Path.GetFileName(item), item, Directory.Exists(item))) This is the best, easiest, and fastest way to make tree view. This article will guide you on how to display parent child tree view dynamically from the database. I swear, I did a really hard work to extract the problem from my real-life project and reduce it to a minimal example. TreeViewArticleSource.zip In this article, we will create a dynamic tree view menu fetched from the database, using ASP.NET MVC 5, C, Razor and SQL Server 2014 (using Visual Studio 2013). I already made experience with some custom controls, but this one has some specific difficulties. ![]() Var items = Directory.GetFileSystemEntries("D:/") User260076833 posted Dear community, I need help with a custom control. ![]() If it’s a folder I’m passing “true” to the load_on_demand property of the jqTree javascript model: public ActionResult Nodes(string node) This is some simple test-code using the local computer folder structure on the D-drive just to try it out. My action is called /Home/Nodes and takes and optional “node” parameter which holds the id of the treeview-node being “expanded”. Then create a controller method in HomeController.cs which will be called on-demand/lazily by the TreeView control in your HTML-view. Public Node(string label, string id, bool loadOnDemand = true) Then open up your /App_Start/BundlesConfig.cs file and add the files to your bundles, something like this:īundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(īundles.Add(new StyleBundle("~/Content/css").Include(Īdd this viewmodel to hold the treeview node data: public class Node The package is not available on Nuget at the moment though, but it’s easy enough to download and set up manually.ĭownload and unzip the code from Github, copy the files jqtree.css and jqtree-circle.png to your /Content folder, and copy the file to your /Scripts folder. For this example to work correctly, you must copy the sample site map data, provided after this code example, to a file named Web.sitemap. ![]() The code is available on and the author mbraak (Marco Braak) is very active in the “issues” section answering questions from users. The following code example demonstrates how to use the TreeView control for site navigation by binding it to a SiteMapDataSource control. This Code is for C# you may implement this Algorithm in any platform other than ’ve been looking for a lightweight TreeView library to use with ASP.NET MVC, and I think I’ve found my “weapon of choice” – jqTree. You just need to pass this array to Asp.Net View and assign this to the data field of TreeView. This Code will generate the required result array. PropertyInfo Props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance) Sb.Append(GenerateUL(subMenu, table, subMenuBuilder)) ĭataTable dataTable = new DataTable(typeof(T).Name) Var subMenuBuilder = new ""nodes"": [")) If (subMenu.Length > 0 & !pid.Equals(parentId)) Private string GenerateUL(DataRow menu, DataTable table, StringBuilder sb) String unorderedList = GenerateUL(parentMenus, table, sb) Var dn = db.menu.ToList() // getting table data from database (menu is the name of table)ĭataRow parentMenus = table.Select("ParentId = 0") I’m going to provide you the best solution using recursion technique with Asp.Net for creating the above hierarchical structure using C#. You can easily download the Library and setup but the challenge is to create the above hierarchical structure from the server side. This Database Table will help you to better understand the TreeView hierarchy data in the Database Table.įor Binding Data from this Table to TreeView, I’m going to use one of the most popular Bootstrap Treeview Library.įor defining the hierarchical structure required to display data in the tree, it’s important to provide a nested array of JavaScript objects like this. So in most cases, parents and child are defined in the same table in a way that every node has its parent id which is the unique key from the same table. Actually, TreeView is the way of defining a hierarchy with the parent-child relation. Let me explain first that why and in what case developers find it difficult.Ībove all, we need to understand the structure of the Database table from where we want to load data to a TreeView. When you expand a node, the TreeView uses IavaScript to. Loading Data from Database to TreeView is difficult as compared to Loading Data into a Table. For example, consider the TreeView control, which lets users expand and collapse nodes at will.
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