#WPF MVVM TREEVIEW EXAMPLE HOW TO#
#WPF MVVM TREEVIEW EXAMPLE CODE#

The main difference to note is that the ItemsSource attribute was not specified for 'leaf' nodes, because I In this case, three node itemsĮxist within testdata.xml, 'root', 'Node', and 'leaf'. Again, within the Window.ResourcesĮlement, right below the XmlDataProvider, we create a data template for each type of tag used within the XML test file. The really interesting work is done in data templates created with HierarchicalDataTemplate. The XML test file has a root node called 'root', so we use that here to start the XML parsing with that node. The XPath attribute is used to specify a node. So in this case, the filename becomes the key name for the resource, and WPF is smart enough to work out the details when the application

By putting theįile in the root directory of the project, and setting its build action to 'Resource', the contents of the file are actually made a part of the assemblyĭuring compile time. The Source attribute is set to the name of the XML file we created for the test, but it does not actually reference a file during run time. In our code, we add a new child to the WindowĮlement right before the opening Grid tag, and below the opening Window tag, to create a section within Window to define some resources. Is included to configure the default window with a Grid control to hold the rest of the visual elements of the window. When you create a WPF project, a skeleton window is created in a file called MainWindow.xaml which opens in the Visual Studio editor.

#WPF MVVM TREEVIEW EXAMPLE CODE#

In the text below, I will highlight just a sample of the XAML code that makes this work. NETĤ.0, but you can move MainWindow.xaml and testdata.xml into a WPF 3.0 project, and it should work just as well. The source code available with this article is a complete working sample. Of that is done by defining several resources. Other than the XML file itself, almost all of the work to enable this is done within XAML, and most It is actually fairly easy to display XML data using WPF. Matter, I came up with the solution described below to populate a TreeView control with XML data. That proved to be a bit of a challenge itself, but with information gleaned from Shifflett and Smith's articles, and a little use of the grey While working that out, I had issues with strange behavior in the TreeView and decided to run some tests with XMLĭata. I found these two articles trying to find a solution to populate a TreeView with directory and file names similar to Window Explorer's directory tree,īut including at least some filenames as well. The HierarchicalDataTemplate demonstrating how it could be used to help recurse tree structure data to populate a TreeView control. Over Reaction To: A Simple WPF Explorer Tree. The second article by Karl Shifflett took off from Smith's article.

#WPF MVVM TREEVIEW EXAMPLE HOW TO#

In that article, Smith demonstrates how to use a DataTemplate to define the contents of TreeViewItems, and how the tree structureĬan be built using the window's 'Loaded' event handler. Reaction to: A Simple WPF Explorer Tree by Josh Smith. This article draws on information gleaned from two other articles about using XML with WPF that you may wish to read. Like this, but there may be something to learn here that will make that business application go together a little more easily. Admittedly, you would not try to write a business application

In this article, all of the magic is found in the XAML file that defines the window contents. In this article, I will describe how to display data contained in a simple XML file using a TreeView control in a WPF application without writing any code.

Wpf mvvm treeview example