Custom Binding Path

Fabrizio Camagna

I have to realize a binding like this <TextBlock Text="{local:mybinding Path=folder1.folder2.item}" FontSize="16"/> in the Path I have a string but this doesn't correspond to an object tree, I would dynamically attach a real object that corresponds to this string. example folder1.folder2.item1 I create an object obj1=new MyObject("folder1.folder2.item1") example folder1.folder2.item2 I create an object obj2=new MyObject("folder1.folder2.item2") obj1 and obj2 are the real objects I want bind. Maybe it's possible with ExtensionMarkup but Silverlight 3 doesn't support it, do it? Do you have any solution?

Mark Salsbery

Fabrizio Camagna wrote:

<TextBlock Text="{local:mybinding Path=folder1.folder2.item}" FontSize="16"/>

folder1.folder2.item is a path to a string or do you want to specify the string in markup?

Mark Salsbery Microsoft MVP - Visual C++ :java:

Fabrizio Camagna

is a path that rappresent a tree path of my "custom namespace" but the objects don't exist before I parse this string. I'd like parse this string and create these objects.

Mark Salsbery

Maybe you could use a converter...

public class MyObject
{
    public MyObject(string str)
    {
        //...
    }
}

public class StringToObjectConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        string str = (string)parameter;
        return new MyObject(str);
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<UserControl.Resources>
    <local:StringToObjectConverter x:Name="StringToObjectConverter" />
</UserControl.Resources>

...
<TextBlock Text="{Binding Converter={StaticResource StringToObjectConverter}, ConverterParameter=folder1.folder2.item}" FontSize="16"/>

Mark Salsbery Microsoft MVP - Visual C++ :java: