How to set up a WPF data table in tree code?

Question

struct Drink { public string Name { get; private set; } public int Popularity { get; private set; } public Drink ( string name, int popularity ) : this ( ) { this.Name = name; this.Popularity = popularity; } } List<Drink> coldDrinks = new List<Drink> ( ){ new Drink ( "Water", 1 ), new Drink ( "Fanta", 2 ), new Drink ( "Sprite", 3 ), new Drink ( "Coke", 4 ), new Drink ( "Milk", 5 ) }; } } 

So that I can see the Name property for treeview element names.

Answer 1

Reid had already considered the Build Your Own XAML approach, but just to give an illustration of the FrameworkElementFactory approach, it would look something like this.

First create an FEF:

 var fef = new FrameworkElementFactory(typeof(TextBlock)); fef.SetBinding(TextBlock.TextProperty, new Binding("Name")); 

Then create a DataTemplate with its VisualTree set to factory:

 DataTemplate dt = new DataTemplate { VisualTree = fef }; 

Although, as Reid notes, the FrameworkElementFactory approach is officially deprecated, it is still widely used, I think because the structure of the XAML lines seems so ragged. (Although the FEF approach quickly becomes insanely complex if you have a non-trivial template ...!)

Answer 2

There are two approaches. The easiest way is to simply generate xaml and parse it at runtime:

 string xaml = "<DataTemplate><TextBlock Text=\"{Binding Name}\"/></DataTemplate>"; MemoryStream sr = new MemoryStream(Encoding.ASCII.GetBytes(xaml)); ParserContext pc = new ParserContext(); pc.XmlnsDictionary.Add("", "http://schemas.microsoft.com/winfx/2006/xaml/presentation"); pc.XmlnsDictionary.Add("x", "http://schemas.microsoft.com/winfx/2006/xaml"); DataTemplate datatemplate = (DataTemplate)XamlReader.Load(sr, pc); treeView1.Resources.Add("dt", datatemplate); 

The second option is to use the FrameworkElementFactory class. However, it is rather complicated, and difficult "right." Since MSDN now refers to this as deprecated, I will not include code for demonstration ...

Answer 3

Instead of creating your own XAML, for example, Reed said that you can get a XAML control using

 String myXAML = System.Windows.Markup.XamlWriter.Save(yourControl.Template) 

Then you can edit the XAML and create your controltemplate / datatemplate file back

 var xamlStream = new MemoryStream(System.Text.Encoding.Default.GetBytes(myXAML)); _buttonControlTemplate = (ControlTemplate)System.Windows.Markup.XamlReader.Load(xamlStream);