internal override PropertyDescriptorCollection GetProperties(tgEntity entity, tgEntityCollectionBase baseCollection)
{
bool weHaveData = false;
int lastOrdinal = 0;
tgColumnMetadataCollection esMetaCols = entity.tg.Meta.Columns;
tgEntityCollectionBase theBaseCollection = baseCollection != null ? baseCollection : entity.Collection;
bool enableHierarchcialBinding = theBaseCollection != null ? theBaseCollection.EnableHierarchicalBinding : true;
if (theBaseCollection != null)
{
if (theBaseCollection.GetList() != null)
{
// Do we have any entities?
weHaveData = theBaseCollection.GetList().Count > 0;
if (weHaveData == false)
{
// If selectedColumns has data then they attempted a load and we know the columns based on thier select statement
weHaveData = theBaseCollection.selectedColumns != null && theBaseCollection.selectedColumns.Keys.Count > 0;
}
}
}
//------------------------------------------------------------
// First we deal with Properties from the DataTable.Columns
// or from the tgColumnMetadataCollection.
//------------------------------------------------------------
ArrayList collNested = new ArrayList();
SortedList <int, PropertyDescriptor> coll = new SortedList <int, PropertyDescriptor>();
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(entity, true);
// Note, we check for selectedColumns because we might be a deserialized collection in which
// case there will not be any selectedColumns
if (weHaveData && theBaseCollection.selectedColumns != null)
{
SortedList list = GetSortedListOfProperties(entity, baseCollection);
for (int i = 0; i < list.Count; i++)
{
string column = (string)list.GetByIndex(i);
if (column == "ESRN")
{
continue;
}
tgColumnMetadata esCol = entity.tg.Meta.Columns.FindByColumnName(column);
if (esCol != null)
{
PropertyDescriptor prop = props[esCol.PropertyName];
if (prop != null)
{
coll.Add(lastOrdinal++, prop);
}
}
else
{
esCol = theBaseCollection.extraColumnMetadata[column];
if (esCol != null)
{
// Extra or Extended Properties
tgPropertyDescriptor dpd = new tgPropertyDescriptor
(
typeof(T),
column,
esCol != null ? esCol.Type : typeof(string),
delegate(object p)
{
return(((tgEntity)p).currentValues[column]);
},
delegate(object p, object data)
{
((tgEntity)p).currentValues[column] = data;
((tgEntity)p).OnPropertyChanged(column);
}
);
coll.Add(lastOrdinal++, dpd);
}
}
}
}
else
{
foreach (tgColumnMetadata esCol in esMetaCols)
{
coll.Add(lastOrdinal++, props[esCol.PropertyName]);
}
}
//------------------------------------------------------------
// Now we deal with extended properties that are using the
// esExtendedPropertyAttribute technique
//------------------------------------------------------------
foreach (PropertyDescriptor prop in props)
{
if (prop.Attributes.Contains(tgEntityCollection <T> .extendedPropertyAttribute))
{
coll.Add(lastOrdinal++, prop);
}
}
//------------------------------------------------------------
// Now we deal with any local properties. Local properties are
// properties that users may want to bind with that are
// NOT backed by data in the DataTable
//------------------------------------------------------------
List <tgPropertyDescriptor> localProps = entity.GetLocalBindingProperties();
if (localProps != null)
{
foreach (tgPropertyDescriptor esProp in localProps)
{
// We check this incase they add a local based property for a DataColumn
// based property, they would do this so it appears in design time, and
// we don't want to add a duplicate
bool exists = coll.ContainsValue(props[esProp.Name]);
if (!exists)
{
if (props[esProp.Name] != null)
{
coll.Add(lastOrdinal++, props[esProp.Name]);
}
else
{
coll.Add(lastOrdinal++, esProp);
}
}
}
}
ArrayList tempColl = new ArrayList();
if (enableHierarchcialBinding)
{
List <tgPropertyDescriptor> hierProps = entity.GetHierarchicalProperties();
if (hierProps != null)
{
foreach (tgPropertyDescriptor esProp in hierProps)
{
esProp.TrueDescriptor = props[esProp.Name];
// coll.Add(lastOrdinal++, esProp);
tempColl.Add(esProp);
}
}
}
// Create the collection
foreach (PropertyDescriptor p in coll.Values)
{
tempColl.Add(p);
}
tempColl.AddRange(collNested);
PropertyDescriptorCollection theProps =
new PropertyDescriptorCollection((PropertyDescriptor[])tempColl.ToArray(typeof(PropertyDescriptor)));
return(theProps);
}
PropertyDescriptorCollection ITypedList.GetItemProperties(PropertyDescriptor[] listAccessors)
{
// We are binding so we turn this on ...
entities.RaiseListChangedEvents = true;
PropertyDescriptorCollection props = null;
Type type = null;
if (listAccessors == null || listAccessors.Length == 0)
{
tgEntity e = null;
// It wants "this" object and so we can use this technique
if (this.Count > 0)
{
e = entities[0] as tgEntity;
}
else
{
e = new T();
}
type = e.GetType();
//------------------------------------
// Check to see if it's in the cached
//------------------------------------
if (this.BindingPropertyCache.ContainsKey(type))
{
return(this.BindingPropertyCache[type]);
}
props = this.GetProperties(e, this);
this.BindingPropertyCache[type] = props;
}
else
{
if (this.EnableHierarchicalBinding == false)
{
return(null);
}
// We should not enter this else statement if hierarchical binding is false
PropertyDescriptor prop = listAccessors[listAccessors.Length - 1];
//------------------------------------
// Check to see if it's in the cached
//------------------------------------
if (this.BindingPropertyCache.ContainsKey(prop.PropertyType))
{
return(this.BindingPropertyCache[prop.PropertyType]);
}
tgPropertyDescriptor esProp = prop as tgPropertyDescriptor;
if (esProp != null)
{
// Nope, not in the cache, let's get the info
props = this.GetProperties(esProp.ContainedEntity, null);
}
else
{
// I give up, go get the raw properties
props = TypeDescriptor.GetProperties(prop.PropertyType);
}
this.BindingPropertyCache[prop.PropertyType] = props;
}
return(props);
}
