如何在xamarin表单中动态更改XAML中的ContentPage标题？

Question

I have a variable var wordsCount = App.words.Count.ToString(); inside my OnAppearing() method in C#. How can I pass the value of the wordsCount to the title property of the contentpage in the XAML side so everytime I go to that page the title is updated accordingly? Kind of like the below code:

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
        xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
        x:Class="Japanese.PhrasesPage"
        Title="wordsCount">
</ContentPage>

Answer 1

In the code behind of your page override OnAppearing() and set the Title property:

override void OnAppearing()
{
  Title = wordsCount;
}

If you would like to use bindings, you need to set the BindingContext and make your field a public property:

public class MyPage : ContentPage
{
  public ContentPage()
  {
    BindingContext = this;
  }

  public string WordCount { get { return wordCount; }}
}

And in XAML:

Title="{Binding WordCount}"