Question

I am using Silverlight RIA with EF and I have an entity with e.g. fields Date, Field1, Field2, …
Binding the data on LoadOperation_Completed works fine. However, I need to group the data by Year, Month, Week. What is the proposed method? I’ve tried

 public void  loadOp_Completed(object sender, EventArgs e) {
    LoadOperation<MyEntity> loadOp = sender as LoadOperation<MyEntity>;

    List<MyEntity> list = ((LoadOperation<MyEntity>)sender).Entities.ToList();

    PagedCollectionView collection = new PagedCollectionView(list);

    collection.GroupDescriptions.Add(new PropertyGroupDescription(**???**));
    this.MyDataGrid.ItemsSource = collection;
 }

but I don’t know what my PropertyGroupDescription should be.

Thank you in advance

Answer 1

Add properties called Year, Month and Week and base them on your date field:

public int Year
{
   get {  return myDate.Year; }
}

Then group by Year, Month, Week 🙂