How can I add an “IsDirty” property to a LINQ to SQL entity?

Question

I am binding my entities to an edit form in WPF. Within a DataTemplate, I want to be able to set the background color of the root container within a DataTemplate to show it

Answer 1

If you are using the dbml generated classes, you should be able to implement a couple of partial methods like this:

public partial class SampleEntity
{
    partial void OnCreated()
    {
        this.IsDirty = true;
    }

    partial void OnLoaded()
    {
        this.PropertyChanged += (s, e) => this.IsDirty = true;
        this.IsDirty = false;
    }

    public bool IsDirty { get; private set; }
}