Is it possible to change the Visibility property of a TextBox with the click of a button in another class(another wpf window)?

Question

I'm trying to change the Visibility property of a TextBox in one window by clicking the button in another window. It does not work with the current code i have. It is easy to do with a button and a TextBox that are in the same class but in separate classes it doesn't work. This is the code behind for the window that has the button i want to press to change the other window's textbox.

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
    }

    private void Button2_Click(object sender, RoutedEventArgs e)
    {
        MainWindow mainWindow = new MainWindow();

        mainWindow.Box.Visibility = Visibility.Visible;
    }
}

}

this is the code for the window whose textbox i want to change

<Grid Background="Blue">
    <Grid.ColumnDefinitions>
        <ColumnDefinition/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>

    <TextBox Name="Box" Text="" Visibility="Hidden"/>
    <Button Name="Buttons" Grid.Column="1" Content="Button" Click="Button_Click"/>
</Grid>

 public partial class MainWindow : Window
{

    public MainWindow()
    {
        InitializeComponent();

        Window1 window1 = new Window1();
        window1.Show();

    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        Box.Visibility = Visibility.Visible;
    }
}

}

Answer 1

Yes it is! You can use Mediator class for that

public class Mediator
{
    static readonly Mediator instance = new Mediator();

    public static Mediator Instance
    {
        get
        {
            return instance;
        }
    }

    private Mediator()
    {

    }


    private static Dictionary<string, Action<object>> subscribers = new Dictionary<string, Action<object>>();


    public void Register(string message, Action<object> action)
    {
        subscribers.Add(message, action);
    }


    public void Notify(string message, Object param)
    {
        foreach (var item in subscribers)
        {

            if (item.Key.Equals(message))
            {
                Action<object> method = (Action<object>)item.Value;
                method.Invoke(param);
            }
        }
    }
}

Add this class to your project, then i constructor of your Main Window u create Instance of mediator

    Mediator _Mediator
    public MainWindow()
    {
        InitializeComponent();
        _Mediator= Mediator.Instance;
         _Mediator.Register("ButtonVisibility",ChangeButtonVisibility);

    }
    private void ChangeButtonVibility(object obj)
    {
      this.button.Visibility=Visibility.Hidden;
    }

in your other window constructor shoud look like this

    Mediator _Mediator;
    public MainWindow1(Mediator _mediator)
    {
        InitializeComponent();
        _Mediator=_mediator;

    }
    //ON button click u notify like this
     private void button_click(object sender, RoutedEventArgs e)
    {

        _Mediator.Notify("ButtonVisibility",null)
    }

When you initialize your child window from main window

MainWindow1 window1= new MainWindow(_Mediator);

NOTICE : Mediator class is used in MVVM patter , but can it can help in this case .

Answer 2

It is possible

By declaring the textbox as a static variable ( in the code not in the xaml file )you can delacre it in the xaml file but you need to use

X:Name="choose_the_name_you_want"

And then reach it from the cs file

And just do it like this

I want the x:name to be exmpl so my code will be

Public Static textblock TB =new exmpl ;

Then just edit TB.Visibility to false

That's it

Declare the static variable out of any void Nut inside the class

Don't forget to comment down the result