WPF Databinding in XAML
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06-09-2019 - |
Question
I have little problem with databinding in my current project. I have an ObservableCollection I want to bind to an ListBox.
public ObservableCollection<GeoDataContainer> geoList = new ObservableCollection<GeoDataContainer>();
...later...
geoListBox.ItemsSource = geoList;
This code works fine. The Listbox has a datatemplate and everything looks perfect.
But I don't want to use C# code for binding. I want to make the binding in the XAML Code. I am searching for days but I don't get it. These are two lines C# code but to archive this in XAML it seems impossible without creating my own class for my collection or adding a DataProvider or resources or whatever.
Is there no easy way to do it?
Solution
Another good way would be instantiating geoList as a resource
<WindowResources>
<l:GeoCollection x:Key="geoList"/>
</WindowResources>
Then you have
GeoCollection geoList = FindResource("geoList") as GeoCollection;
Of course, this is for cases when the data is related to the view only. If this is related to model or modelview, you use DataContext and bind to its properties.
OTHER TIPS
All you have to do is expose the collection and bind to it. For example, if you expose it as:
public ICollection<GeoDataContainer> GeoList
{
get { return geoList; }
}
You will be able to bind to it as:
<ListBox ItemsSource="{Binding GeoList}"/>
The "trick" is to make sure that the DataContext
of the ListBox
is the class that exposes the GeoList
property.
Kent suggestion is the way to go...
On a further note, if you do not wish to set your DataContext to the list, you can also retrieve the property with an another form of binding:
Make sure your root control has a name, i.e. "Root"
{Binding ElementName=Root, Path=GeoList}