Hi,

For some reason there is no ManyToMany.ascx or ManyToMany_Edit.ascx controls when using the default asp.NET DD DomainService template.

I am trying to change the ManyToMany.ascx and ManyToMany_Edit.ascx controls from the normal Entity Framework DD template to be able to use with DomainDataSource but am having problems. Please could someone shed some light?

These are the problems I am having:

1 - It works for EntityDataSource

// Register for the DataSource's updating event
EntityDataSource ds = (EntityDataSource)this.FindDataSourceControl();

It doesn't work for DomainDataSource

DomainDataSource ds = (DomainDataSource )this.FindDataSourceControl();

How do I get the DomainDataSource from within the ascx control?

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 - It works for EntityDataSource

 // Get the collection of territories for this employee
    RelatedEnd entityCollection = (RelatedEnd)Column.EntityTypeProperty.GetValue(e.Entity, null);

DomainDataSource doesn't seem to have an e.Entity property or a e.Context

How do I get the higlighted code below extracted from ManyToMay_Edit.ascx to work with Domain Service  DomainDataSource 

ascx EntityDataSource  Code
-----------------------------------

public void Page_Load(object sender, EventArgs e)
{
            // Register for the DataSource's updating event
            EntityDataSource ds = (EntityDataSource)this.FindDataSourceControl();

            // This field template is used both for Editing and Inserting
            ds.Updating += new EventHandler<EntityDataSourceChangingEventArgs>(DataSource_UpdatingOrInserting);
            ds.Inserting += new EventHandler<EntityDataSourceChangingEventArgs>(DataSource_UpdatingOrInserting);
}

void DataSource_UpdatingOrInserting(object sender, EntityDataSourceChangingEventArgs e)
{
            MetaTable childTable = ChildrenColumn.ChildTable;

            // Comments assume employee/territory for illustration, but the code is generic

            // Get the collection of territories for this employee
            RelatedEnd entityCollection = (RelatedEnd)Column.EntityTypeProperty.GetValue(e.Entity, null);

            // In Edit mode, make sure it's loaded (doesn't make sense in Insert mode)
            if (Mode == DataBoundControlMode.Edit && !entityCollection.IsLoaded)
            {
                entityCollection.Load();
            }

            // Get an IList from it (i.e. the list of territories for the current employee)
            // REVIEW: we should be using EntityCollection directly, but EF doesn't have a
            // non generic type for it. They will add this in vnext
            IList entityList = ((IListSource)entityCollection).GetList();

            // Go through all the territories (not just those for this employee)
            foreach (object childEntity in childTable.GetQuery(e.Context))
            {

                // Check if the employee currently has this territory
                bool isCurrentlyInList = entityList.Contains(childEntity);

                // Find the checkbox for this territory, which gives us the new state
                string pkString = childTable.GetPrimaryKeyString(childEntity);
                ListItem listItem = CheckBoxList1.Items.FindByValue(pkString);
                if (listItem == null)
                    continue;

                // If the states differs, make the appropriate add/remove change
                if (listItem.Selected)
                {
                    if (!isCurrentlyInList)
                        entityList.Add(childEntity);
                }
                else
                {
                    if (isCurrentlyInList)
                        entityList.Remove(childEntity);
                }
            }
}

Cheers

C