It is a very interested point here that I did not pass Image path for each country, but TreeView shows flag with each country. In this example, I have created resource at control level and set the TargetType=”TreeViewItem” and also set the “HeaderTemplate” property of the TreeViewItem. Using XAMLįor creating general TreeViewItem item template, create Template resource at application level, window level or at control level resource. Because the problem with the last example was for the same design, we add template for each tree item. If the style of all the elements is the same, then it is better to create header template at once. Stack.Orientation = Orientation.Horizontal Private void CreateTreeViewItemTemplate() Public class ImageTreeViewItem : TreeViewItem Just add TreeView control on your page and add items in either using XAML or from code behind. If you want to create a simple tree then WPF provides you an easy way draw tree. This article will cover the following 6 main areas: At the start of my journey, I found many difficulties and sometimes I said Windows application contains more user friendly controls to work with, but with the passage of time I found WPF controls more user friendly. This problem started my journey to learn features provided by WPF. I had to use tree view in one of my projects where I had to show image and text as most of tree has in windows. This article will help you to understand the basics of tree view and also gives you deep knowledge to show content on tree according to your requirement. It mainly focuses on how to show contents in the tree view. It will give you a knowledge to create simple Tree, customization, Template and Binding. Step 5: Create XAML Page to Display treeview CompanyDetailView.This article describes the use of TreeView control provided by WPF. I created two methods for getting a list of Departments and List of Employees and bind to each viewmodel properties. This viewmodel is for CompanyDetailView.xaml page declared ObservableCollection DepartmentCollection property to hold collection of departments to bind in treeviewitems. Public class EmployeeViewModel : ViewModelBase Step 3: Create viewmodels for Each Model EmployeeViewModel.cs
If we want to notify viewmodels property change, then we must inherit this class in every viewmodel, and override RaisePropert圜hanged method to notify property change. Temp( this, new Propert圜hangedEventArgs(propertyName)) Propert圜hangedEventHandler temp = Propert圜hanged / /// protected void RaisePropert圜hanged( String propertyName) / /// Raise when property value propertychanged RaisePropert圜hanged(GetPropertyName(propertyExpression)) / /// /// protected virtual void RaisePropert圜hanged
/ /// Raise when property value propertychanged or override propertychage / /// /// /// public static string GetPropertyName(Expression> e) Public event Propert圜hangedEventHandler Propert圜hanged Public abstract class ViewModelBase:INotifyPropert圜hanged Step 1: Create Models for Department and Employee We wish to bind departments in parent node and employees for each department in child nodes in Treeview. This example is for a Company that has many departments and each department has employees. You can change the style of treeview using custom template style. WPF has HierarchicalDataTemplate to bind treeviewitem in hierarchical data by setting ItemsSource property. One parent node has multiple child nodes. Treeview is used to display data in a hierarchical series with parent child relationship. All business logic related to view is written in viewmodel. It has properties, commands and propertychanged notification logic to execute when any property raise or changed. Viewmodel is the mediator between view and viewmodel.
View is used for Data binding and displaying data. It contains visual controls and rich UI using styles and templates and storyboard. Model/View/ViewModel also relies on one more thing: a general mechanism for data binding. The Model-View-ViewModel (MVVM) pattern provides a flexible way to build WPF/Silverlight applications that promotes code re-use, simplifies maintenance and supports testing. The Model View ViewModel (MVVM) is an architectural pattern used in software engineering that originated from Microsoft which is specialized in the Presentation Model design pattern. We will also focus on MVVM (Model-View-ViewModel) pattern in this article. In this article, we walk through how to change appearance of Treeview control using Templates and Styles. In the development world, sometimes we have a requirement to change the appearance of the control.