Convert Xamarin.Forms.Binding into System.string - xamarin.forms

Question

How would you convert a binding object into a string? I'm trying to bind text to a property using a bindable property, but I'm getting an error that says
cannot convert from Xamarin.Forms.Binding to System.string.
I assumed the BindableProperty returnType typeof(string) would have caught this.
Here's my front-end code (App.rug.Length is a string):
<local:MenuItem ItemTitle="Length" ItemImage="icons/blue/next" ItemSubText="{Binding App.rug.Length}" PageToo="{Binding lengthpage}"/>
Here's my back-end code:
public class MenuItem : ContentView
{
private string itemsubtext { get; set; }
public static BindableProperty SubTextProperty = BindableProperty.Create("ItemSubText", typeof(string), typeof(MenuItem), null, BindingMode.TwoWay);
public MenuItem()
{
var menuTapped = new TapGestureRecognizer();
menuTapped.Tapped += PushPage;
StackLayout Main = new StackLayout
{
Children = {
new SectionLine(),
new StackLayout {
Padding = new Thickness(10),
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Fill,
Children = {
new Label {
Margin = new Thickness(10, 2, 10, 0),
FontSize = 14,
TextColor = Color.FromHex("#c1c1c1"),
HorizontalOptions = LayoutOptions.End,
Text = this.ItemSubText
}
}
}
}
};
Main.GestureRecognizers.Add(menuTapped);
Content = Main;
}
public string ItemSubText
{
get { return itemsubtext; }
set { itemsubtext = value; }
}
}
Here is the error:
Xamarin.Forms.Xaml.XamlParseException: Position 26:68. Cannot assign
property "ItemSubText": type mismatch between "Xamarin.Forms.Binding"
and "System.String"

Answer 1

the issue you are getting is probably caused by the binding you have used for the subtext property.
Your variable App.rug.Length is a static variable so therefore you will need to specify it in the binding like below
<local:MenuItem ItemTitle="Length" ItemImage="icons/blue/next" ItemSubText="{Binding Source={x:Static local:App.rug.Length}}" PageToo="{Binding lengthpage}"/>
where
xmlns:local="clr-namespace:{App Namespace here}"
Also fix up your property Accessors for ItemSubText property
public string ItemSubText
{
get { return (string)GetValue (SubTextProperty); }
set { SetValue (SubTextProperty, value); }
}