Question

I have a converter in the code behind called StringToIntConverter I try using it in xaml binding like this where s is the project namespace:

Converter={s:StringToIntConverter}

But it says that it is missing an assembly reference. What am I doing wrong?

I know there is some way to put it as a resource and then reference the resource but I am not sure how to do it.

Answer 1

<Some.Resources>
    <s:StringToIntConverter x:Key="StringToIntConverter"/>
</Some.Resources>
<!-- ... -->
Converter={StaticResource StringToIntConverter}

Curly braces indicate a markup extension, they cannot just be used arbitrarily to instantiate objects, but for convenience you could turn your converter into a markup extension.

Something like:

public class StringToIntConverter : MarkupExtension, IValueConverter
{
    //...

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        return this;
    }
}

Then the code you used would work just fine!

---

Also note that you could use the binding in XML-element syntax to instantiate converters in place as well, e.g.

<TextBox>
    <TextBox.Text>
        <Binding Path="String">
            <Binding.Converter>
                <s:StringToIntConverter />
            </Binding.Converter>
        </Binding>
    </TextBox.Text>
</TextBox>