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The following example will show you why we need these two things: Try running it for yourself and watch how even though you add something to the list or change the name of one of the users, nothing in the UI is updated.

The example is pretty simple, with a User class that will keep the name of the user, a List Box to show them in and some buttons to manipulate both the list and its contents.

How to handle them may vary, depending on what you're doing and what you're looking to accomplish, but WPF comes with two very easy solutions that you can use: The Observable Collection and the INotify Property Changed interface.So when you restart the app, the last snapshot stored is displayed.You will have to actually kill the app by swiping in the suspended app list and restart the app.The Items Source of the list is assigned to a quick list of a couple of users that we create in the window constructor.The problem is that none of the buttons seems to work. The first step is to get the UI to respond to changes in the list source (Items Source), like when we add or delete a user. Add(Sng) End If End Sub Public Sub New() ' Add any initialization after the Initialize Component() call. Album = Input Box("Enter Album", "Album", "Unknown") _Song Library.In the previous article, we manually populated a List View control through XAML code, but in WPF, it's all about data binding.The concept of data binding is explained in detail in another part of this tutorial, but generally speaking it's about separating data from layout.We use a bunch of Text Block controls to build each item, where we put part of the text in bold.For the e-mail address, which we added to this example, we underline it, give it a blue color and change the mouse cursor, to make it behave like a hyperlink.So, let's try binding some data to a List View: We populate a list of our own User objects, each user having a name and an age.The data binding process happens automatically as soon as we assign the list to the Items Source property of the List View, but the result is a bit discouraging: Each user is represented by their type name in the List View. NET doesn't have a clue about how you want your data to be displayed, so it just calls the To String() method on each object and uses that to represent the item.What we need is a list that notifies any destinations of changes to its content, and fortunately, WPF provides a type of list that will do just that.Does anyone know why my List View with following Code is not working?




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