CODEWITHSUNDEEP
c#wpfdata-binding
Herks
Herks

Reputation: 897

C# binding not working

I have implemented a basic data binding in code behind, this is the code:

Binding bindingSlider = new Binding();
bindingSlider.Source = mediaElement.Position;
bindingSlider.Mode = BindingMode.TwoWay;            
bindingSlider.Converter = (IValueConverter)Application.Current.Resources["DoubleTimeSpan"];            
slider.SetBinding(Slider.ValueProperty, bindingSlider);

And this is the converter's code,

class DoubleTimeSpan : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter,
string language)
    {
        return ((TimeSpan)value).TotalSeconds;
    }

    public object ConvertBack(object value, Type targetType, object parameter,
string language)
    {           
        return TimeSpan.FromSeconds((double)value);
    }
}

Even though I don't receive compiler's error message, but the binding code is not working. Why?

Upvotes: 5

Views: 1386

Answers (4)

user2122394
user2122394

Reputation: 21

You need to use the Path property instead of Source in data binding.

Upvotes: 2

Abdusalam Ben Haj
Abdusalam Ben Haj

Reputation: 5423

If the Source you are binding to is a UIElement, try this :

Binding bindingSlider = new Binding("Position");
bindingSlider.ElementName = "mediaElement";
bindingSlider.Mode = BindingMode.TwoWay;            
bindingSlider.Converter = (IValueConverter)Application.Current.Resources["DoubleTimeSpan"];            
slider.SetBinding(Slider.ValueProperty, bindingSlider);

Upvotes: 0

Anton Tykhyy
Anton Tykhyy

Reputation: 20066

bindingSlider.Source = mediaElement.Position ; // boo!

This is wrong. Source is the object containing the property you are binding to. What you want is

bindingSlider.Source = mediaElement ;
bindingSlider.Path   = new PropertyPath ("Position") ;

Upvotes: 2

RredCat
RredCat

Reputation: 5421

It is a quite difficult to get from your code what is wrong. As Fabian said - check output windows. But increase binding trace level before. Check next to know how to do it.

PresentationTraceSources.TraceLevel

Upvotes: 0

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