Update text in adorner on button click - wpf

Question

I have created my custom adorner to cover my main window with a gray canvas alongwith a textblock at center to show some status text while i was working on other window.
What i am currently doing is fetching the required adornerElement(ie Canvas with a textblock) from my resources and passing it to an adorner in my view constructor like this -
ResourceDictionary reportResourceDictionary = App.LoadComponent(new Uri("Resources/ReportResources.xaml", UriKind.Relative)) as ResourceDictionary;
UIElement adornerElement = reportResourceDictionary["RefreshingReportAdorner"] as UIElement;
mainWindowBlockMessageAdorner = new MainWindowBlockMessageAdorner(mainPanel, adornerElement);
But i want to update that text in textblock in some scenarios say if i click on some button in other window but how to update the text dynamically??
Adorner element from Resource file-
<Grid x:Key="RefreshingReportAdorner">
<Rectangle Fill="Gray"
StrokeThickness="1"
Stroke="Gray"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"/>
<Border BorderBrush="Black"
BorderThickness="2"
Background="White"
HorizontalAlignment="Center"
VerticalAlignment="Center">
<TextBlock i18n:LanguageManager.VisualId="6"
Text="Some Text(Update dynamically)"
Padding="15,10,15,10"/>
</Border>
</Grid>
Let me know if additional code or approach required..

Answer 1

Have you tried to create some model and push it to RefreshingReportAdorner element's DataContext?
Code:
var reportResourceDictionary = App.LoadComponent(new Uri("Resources/ReportResources.xaml", UriKind.Relative)) as ResourceDictionary;
var adornerElement = reportResourceDictionary["RefreshingReportAdorner"] as FrameworkElement;
var model = new Model();
model.MyText = "Initial text";
adornerElement.DataContext = model;
mainWindowBlockMessageAdorner = new MainWindowBlockMessageAdorner(mainPanel, adornerElement);
...
model.MyText = "Text after click";
XAML:
<TextBlock i18n:LanguageManager.VisualId="6"
Text="{Binding MyText}"
Padding="15,10,15,10"/>
Model:
public class Item : INotifyPropertyChanged
{
private string _myText;
public string MyText
{
get
{
return this._myText;
}
set
{
this._myText= value;
this.OnPropertyChanged("MyText");
}
}
}