Binding TextBlock text in a new Window?

Question

I've created a warning window to verify delete actions by the user, using Window.ShowDialog and setting the DialogResult. Everything works fine, except that the warning text doesn't appear in the TextBlock and I don't know why. Here's my Window :

<Window x:Class="RoVCo.Windows.VerifyWindow"
        ....
        WindowStyle="None" Padding="10" ResizeMode="NoResize">
        <StackPanel>
            <TextBlock Height="Auto" Text="{Binding TBText, Mode=OneWay}" Foreground="Yellow" TextWrapping="Wrap" />
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,10,0,0">
                <Button Content="Cancel" Margin="10,0" Width="50" Click="CancelVerify" />
                <Button Content="OK" Width="50" Click="ConfirmVerify" />
            </StackPanel>
        </StackPanel>
</Window>

And the class:

public partial class VerifyWindow : Window
{
    public VerifyWindow(string content)
    {
        InitializeComponent();
        _text = content;
    }
    private string _text = "";
    public string TBText { get { return _text; } }

    private void CancelVerify(object sender, RoutedEventArgs e)
    {
        this.DialogResult = false;
        this.Close();
    }
    private void ConfirmVerify(object sender, RoutedEventArgs e)
    {
        this.DialogResult = true;
        this.Close();
    }
}

And I call it like such:

var window = new RoVCo.Windows.VerifyWindow("Removing this skill will erase all DP spent on it from all levels. Continue?");
if (window.ShowDialog() == false) return;

Answer 1

为了使用绑定，您需要本地属性是公共的，并且是通知属性或依赖项属性。

Answer 2

You can try this solution.

1. Change your VerifyWindow constructor to:

   public VerifyWindow() { InitializeComponent(); }

and remove the TBText and _text code.

1. Create a new class called VerifyViewModel

   public class VerifyViewModel : INotifyPropertyChanged { public VerifyViewModel(string content) { this.TBText = content; }

    public string TBText { get; private set; } #region INPC code - can create an abstract base view model class and put this there instead public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName)); } protected virtual void OnPropertyChanged(PropertyChangedEventArgs e) { var handler = this.PropertyChanged; if (handler != null) { handler(this, e); } } #endregion 

   }

2. Call this code as below

   var viewmodel = new VerifyViewModel ("Removing this skill will erase all DP spent on it from all levels. Continue?");

     var window = new VerifyWindow { DataContext = viewmodel }; if (window.ShowDialog() == false) return; 

Answer 3

If its just a single property that you are using in the Dialog I think using a DependancyProperty will be the better option then adding all the INotifyPropertyChanged logic

public partial class VerifyWindow : Window
{
    public VerifyWindow(string content)
    {
        InitializeComponent();
        TBText = content;
    }

    public static readonly DependencyProperty TBTextProperty =
        DependencyProperty.Register("TBText", typeof(string), typeof(VerifyWindow), new UIPropertyMetadata(string.Empty));

    public string TBText
    {
        get { return (string)GetValue(TBTextProperty); }
        set { SetValue(TBTextProperty, value); }
    }

    private void CancelVerify(object sender, RoutedEventArgs e)
    {
        this.DialogResult = false;
        this.Close();
    }
    private void ConfirmVerify(object sender, RoutedEventArgs e)
    {
        this.DialogResult = true;
        this.Close();
    }
}