private static void AddReferenceKeyColumns(List <EntityDataSourceColumn> columns, MetadataWorkspace ocWorkspace, EntitySet entitySet, EntityType entityType, Dictionary <EdmProperty, EntityDataSourcePropertyColumn> entityProperties)
{
foreach (AssociationSetEnd toEnd in GetReferenceEnds(entitySet, entityType, /*forKey*/ true))
{
ReferentialConstraint constraint;
bool isContained = EntityDataSourceUtil.IsContained(toEnd, out constraint);
// Create a group for the end columns
EntityType toType = EntityDataSourceUtil.GetEntityType(toEnd);
Type clrToType = EntityDataSourceUtil.GetClrType(ocWorkspace, toType);
EntityDataSourceReferenceGroup group = EntityDataSourceReferenceGroup.Create(clrToType, toEnd);
// Create a column for every key
foreach (EdmProperty keyMember in GetEntityType(toEnd).KeyMembers)
{
EntityDataSourceColumn controllingColumn = null;
if (isContained)
{
// if this key is 'contained' in the entity, make the referential constrained
// property the principal for the column
int ordinalInConstraint = constraint.FromProperties.IndexOf(keyMember);
// find corresponding member in the current (dependent) entity
EdmProperty correspondingProperty = constraint.ToProperties[ordinalInConstraint];
controllingColumn = entityProperties[correspondingProperty];
}
columns.Add(new EntityDataSourceReferenceKeyColumn(ocWorkspace, group, keyMember, controllingColumn));
}
}
}