I'm trying to create a common custom control in the XamarinForms PCL project that would be the equivalent of a UserControl in Windows 8/RT.
Here's what I have so far.
First I created the bindable property in the control that inherits from ContentView:
public static readonly BindableProperty TitleProperty =
BindableProperty.Create<MyCustomControl, string> (
p => p.Title, defaultValue: "NO TITLE", defaultBindingMode: BindingMode.TwoWay,
validateValue: null,
propertyChanged: (bindableObject, oldValue, newValue) =>
{
if (bindableObject != null)
{
}
Logger.Instance.WriteLine ("TITLE PROPERTY CHANGED: OldValue = " + oldValue + " , NewValue = " + newValue);
});
public string Title { get { return (string)GetValue (TitleProperty); } set { SetValue (TitleProperty, value); } }
Then I want to use it in a label in the XAML as such:
<Label Text="{TemplateBinding Title}" />
However, the TemplateBinding MarkupExtension doesn't exist so I get a XamlParseException.
I can already think of a workaround which is naming the label with an x:Name="MyLabel" and changing the Text value in the propertyChanged delegate with the newValue, but is there a better way to do that?
I do NOT require custom renderers for this control and want to do it all in XAML if possible. Thanks in advance!
Update: Pete answered it. Just use {Binding } and set the BindingContext Properly.
Here's how I got it to work.
var pageContent = new CustomControl ();
pageContent.SetBinding (CustomControl.TitleProperty, new Binding(path: "Title"));
pageContent.BindingContext = new {Title = "This is the title that's databound!"};
Doesn't look like the default value in the BindableProperty works though..
