Question

Property in my viewmodel that I’m trying to bind to:

 private TextActionValue _textActionVal;
    public TextActionValue TextActionVal
    {
        get { return _textActionVal; }
        set
        {
            _textActionVal = value; 
        }
    }

xaml:

<Grid Margin="0,15,15,15" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>
    <GroupBox Grid.Row="1" BorderThickness="0">
        <TextBox Margin="0,5,0,5" AcceptsReturn="True" AcceptsTab="True" Text="{Binding TextActionValue.Text}" HorizontalAlignment="Stretch" MinHeight="100"></TextBox>
    </GroupBox>
</Grid>

And finally the TextActionValue class:

public class TextActionValue : ISomeAction, INotifyPropertyChanged
{
    private String _text;
    public String Text
    {
        get { return _text; }
        set
        {
            _text = value;
            OnPropertyChanged("Text");
        }
    }

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
    #endregion
}

The text property is filled. There’s definitely a value in there when I step it.

If I just bind to a basic string property it works. It does not like “TextActionValue.Text”. This is not an option unless I do some refactoring which I want to avoid if I can.

If I put a breakpoint inside of TextActionValue get…the get is never hit. So this is telling me the binding is never created. Why though…or is what I’m trying to do not possible?

Answer 1

Try binding to TextActionVal.Text instead of TextActionValue.Text

You are trying to bind to the class not the property.

Also check your output window while debugging to see data binding errors.