Information on Title - WPF

Question

I have an application where the user can select the company to be worked on. When he selects, I would like this information to go to the Application Title... This is possible?

The attribute Title is in the parent window. Already this event Mousedoubleclick is in a Usercontrol son... This is my doubt, how to pass from the son to the Father..

For now I have this Textblock to add the information in the title:

<TextBlock Text="{Binding Titulo, RelativeSource={RelativeSource FindAncestor,AncestorType=Window}}" HorizontalAlignment="Center" VerticalAlignment="Top"/>

Title:

private string _titulo;

    public string Titulo
    {
        get
        {
            return _titulo;
        }
        set
        {
            _titulo = value;
        }
    }

What can I do here when the user selects?

private void dataGridEmpresa_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {

          --- AQUI! ---

    }

After the change:

<my:EscolherEmpresa TitleValue="{Binding Title,RelativeSource={RelativeSource FindAncestor,AncestorType=Window}, Mode=OneWayToSource}"/>

Where I open Usercontrol:

private void main_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.F5){

            tbTitulo.Text = "ESCOLHER EMPRESA PARA TRABALHAR";

            MainMdiContainer.Children.Clear();
            MainMdiContainer.Children.Add(new MdiChild()
            {
                Margin = new Thickness(-10, -28, 0, 0),
                Width = this.Width - 20,
                Height = this.Height - 113,
                //WindowState = System.Windows.WindowState.Maximized,
                Style = null,
                Content = new Telas.EscolherEmpresa()
            });
        }

    }

Answer 1

I haven’t tried it but I think it does what it wants.

In the Usercontrol declare a Dependencyproperty

public string TitleValue
{
    get { return (string)GetValue(TitleValueProperty); }
    set { SetValue(TitleValueProperty, value); }
}

public static readonly DependencyProperty TitleValueProperty =
    DependencyProperty.Register("TitleValue", typeof(string),
                                 typeof(UserControl1));//Nome da classe do UserControl

In the XAML of Window by including the Usercontrol:

<my:UserControl1 TitleValue="{Binding Title,RelativeSource={RelativeSource FindAncestor,AncestorType=Window}, Mode=OneWayToSource}"/>

In the method dataGridEmpresa_MouseDoubleClick():

private void dataGridEmpresa_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{

   string title = //Obtenha o titulo
   TitleValue = title;
}