Question

I have a textblock inside a list view that I need to hide or collapse when it is empty or null. I tried using a string converter but that does not do it.

Any other ideas?

Update # 1:
Here is the code inside the textblock:

Visibility="{Binding Converter={StaticResource StringConverter}}

Here is the converter:

public class StringConverter : IValueConverter
  {
      public object Convert(object value, Type targetType, object parameter,
        CultureInfo culture)
      {
          return string.IsNullOrEmpty(value.ToString()) ? Visibility.Collapsed : Visibility.Visible;
      }

      public object ConvertBack(object value, Type targetType, object parameter,
      CultureInfo culture)
      {
          return DependencyProperty.UnsetValue;
      }

  }

Answer 1

I would recommend creating text and visibility bindings on your textbox.

Here’s an example of the view model properties you’d have.

public String TextBoxText
{
    get { return textBoxText; }
    set
    {
        if (value != textBoxText)
        {
            textBoxText= value;
            SetTextBoxVisibility();
            OnPropertyChanged("TextBoxText");
        }
    }
}
private String textBoxText;

public Visibility TextBoxVisibility
{
    get { return textBoxVisibility; }
    set
    {
        if (value != textBoxVisibility)
        {
            textBoxVisibility= value;
            OnPropertyChanged("TextBoxVisibility");
        }
    }
}
private Visibility textBoxVisibility;

public void SetTextBoxVisibility()
{
    this.TextBoxVisibility = String.IsNullOrEmpty(this.TextBoxText) ? Visibility.Collapsed : Visibility.Visible;
}