I found I didn't need TreeCollections at all. Update: I was able to load and display a hierarchical tree on my web page with very little code, using jsTree. If you want to pre-load your data into a tree structure first, like I am doing with TreeCollections, then perhaps populating a structure will work, but it will still need help with javascript if you want to interactively show/hide branches on the tree. There are two good lazy-load implementations of JSTree on SO here: Lazy-loading TreeView with JsTree in Asp.Net MVCĭepending on the size and depth of your tree, if you can pull your data dynamically as the user navigates the tree, this might be the best solution. I think we will have to use at least some javascript. You mention JsTree, and I think that is a viable option, but it's not html-only as you specified. Now to display the data on a web page, I don't think Microsoft has any tools to help us. You might want to look at that for your tree data structure. I have implemented that and can successfully build one or multiple hierarchical trees from my data. I have also looked at Telerik and Syncfusion, but am trying to avoid paying for a solution.įirst, for the data structure, I did find a NuGet package called TreeCollections written by David West here:
#ASP.NET TREEVIEW EXAMPLES WINDOWS#
You are right, there is a TreeView for ASP.NET Core, but it's for Windows Forms and not web pages:
You can use our client-side API to expand and collapse nodes, find nodes, obtain and change node state information, and also get and change the selected node.Client-side events allow you to respond to node clicks, the changing nodes checked state, and perform custom actions before and after nodes are expanded and collapsed.
Once a node’s content has been loaded, end-users can switch to this node on the client-side without callbacks or postbacks. When end-users expand nodes, their content is loaded via callbacks. In this case, ASPxTreeView initially loads only the content of expanded nodes onto the client. You can enable AJAX support by setting the EnableCallbacks property to true. This approach is the best choice if you need centralized control over the appearance of several controls or the entire site. ASPxTreeView’s appearance can be customized using CSS classes.Several themes are available, so you can apply an attractive design to your ASPxTreeView with just a couple of mouse clicks.Control’s elements can be aligned from right to left to support locales using right-to-left languages.Custom images can be used as expand buttons.You can apply templates for all identical elements within ASPxTreeView (using control level templates) or for a particular element (using node level templates). Templates can be specified for two element types: node text content and entire node content.You can manage the visibility of all check boxes or hide particular check boxes.
Nodes can be checked using check boxes.The available selections are node text, both image and text or the complete node area. You can specify where end-users can click to use node functionality.ASPxTreeView can operate in Virtual Mode, which greatly reduces both the server load and start-up time when working with complex or dynamically created hierarchies.ASPxTreeView can be populated with node information taken from a data source containing hierarchical data, including SiteMapDataSource and XmlDataSource.This topic lists the main features of the ASPxTreeView control. With integrated template technology you can easily transform nodes into anything you can imagine. The ASPxTreeView control is highly customizable: you can change the appearance of almost any visual element in ASPxTreeView. You can also operate in Virtual Mode to efficiently use your server resources when working with complex or dynamically created hierarchies. With ASPxTreeView, you can manually create a tree or easily populate it with data by binding to hierarchical data sources, including XmlDataSource and SiteMapDataSource. ASPxTreeView is an easy and useful navigation control that allows you to represent hierarchical structure data as a tree.
0 kommentar(er)
