WPF

Jammer wrote:

Are you expecting to see something like MyCustomPropertyName="" become MyCustomPropertyName="C:\windowlocation\window.xaml.cs" in your XAML file??

    internal class Metadata : IRegisterMetadata {

        // Called to register design time metadata
        public void Register() {
            AttributeTableBuilder builder = new AttributeTableBuilder();

            //Task
            builder.AddCustomAttributes(typeof(Button), new FeatureAttribute(typeof(TaskProvider)));
            
            MetadataStore.AddAttributeTable(builder.CreateTable());
        }
    }




// class that will change the property
    class TaskProvider : Microsoft.Windows.Design.Interaction.PrimarySelectionTaskProvider
    {
        public TaskProvider()
        {
          
        }

        protected override void Activate(Microsoft.Windows.Design.Model.ModelItem item)
        {

           if (String.IsNullOrEmpty((String)item.Properties["StringProperty"].ComputedValue))
                item.Properties["StringProperty"].SetValue(Guid.NewGuid().ToString()); //sets the value in XAML

            base.Activate(item);
        }
    }