public static IDictionary MergeElementTypes(DynaElem FromType, DynaElem ToType)
{
// Name of Transaction
string transactionName = "Merge Element Type";
// Get the Revit elements from the Dynamo Elements
RevitDB.ElementType rFromType = (RevitDB.ElementType)FromType.InternalElement;
RevitDB.ElementType rToType = (RevitDB.ElementType)ToType.InternalElement;
RevitDoc document = rToType.Document;
// Collect all instances of FromType
RevitDB.FilteredElementCollector collector = new RevitDB.FilteredElementCollector(document);
RevitDB.BuiltInParameter parameterId = RevitDB.BuiltInParameter.ELEM_TYPE_PARAM;
RevitDB.FilterNumericEquals filterNumberRule = new RevitDB.FilterNumericEquals();
RevitDB.ParameterValueProvider provider = new RevitDB.ParameterValueProvider(new RevitDB.ElementId(parameterId));
RevitDB.FilterRule filterRule = new RevitDB.FilterElementIdRule(provider, filterNumberRule, rFromType.Id);
RevitDB.ElementFilter filterParameter = new RevitDB.ElementParameterFilter(filterRule, false);
Type instanceType = Select.InstanceClassFromTypeClass(rFromType.GetType());
if (instanceType != null)
{
collector.OfClass(instanceType);
}
IEnumerable <RevitDB.Element> instances = collector
.WhereElementIsNotElementType()
.WherePasses(filterParameter)
.ToElements();
// Intialize list for elements that are successfully merged and failed to merge.
List <DynaElem> elements = new List <DynaElem>();
List <DynaElem> elementsFailed = new List <DynaElem>();
// Define Function to change instances types.
Action <IEnumerable <RevitDB.Element> > _SetType = (isntances) =>
{
foreach (RevitDB.Element elem in instances)
{
// If Element is in a group, put the element in the failed list
int groupId = elem.GroupId.IntegerValue;
if (groupId == -1)
{
//elem.TextNoteType = rToType;
RevitDB.Parameter param = elem.get_Parameter(RevitDB.BuiltInParameter.ELEM_TYPE_PARAM);
param.Set(rToType.Id);
DynaElem dElem = elem.ToDSType(true);
elements.Add(dElem);
}
else
{
DynaElem dElem = elem.ToDSType(true);
elementsFailed.Add(dElem);
}
}
// Check if there are any instances of FromType left
int count = collector.Count();
if (count == 0)
{
document.Delete(rFromType.Id);
}
};
if (document.IsModifiable)
{
TransactionManager.Instance.EnsureInTransaction(document);
_SetType(instances);
TransactionManager.Instance.TransactionTaskDone();
}
else
{
using (Autodesk.Revit.DB.Transaction trans = new Autodesk.Revit.DB.Transaction(document))
{
trans.Start(transactionName);
_SetType(instances);
trans.Commit();
}
}
return(new Dictionary <string, object>
{
{ "Merged", elements },
{ "Failed", elementsFailed }
});
}
