Creating Property set and assigning properies value - .NET C#

or_levi5LSMC — Sun, 23 Mar 2025 16:36:18 GMT

hey all,

im tryng to create a utill class that will create property-set to an object, and attatch propetries to every object instance("set values" to the property set of each instance of an object)

i can create or get new property-set by the following method:

public static ObjectId GetOrCreatePropertySetDefinition(Transaction tr, string propertySetName, List<(string Name, Type Type)> properties) { // Access the Named Object Dictionary (NOD) DBDictionary nod = tr.GetObject( HostApplicationServices.WorkingDatabase.NamedObjectsDictionaryId, OpenMode.ForRead ) as DBDictionary; foreach (var entry in nod) { var key = entry.Key; var value = entry.Value; System.Diagnostics.Debug.WriteLine($"Key: {key}, Value: {value}"); } // Check if Property Set Definitions Dictionary exists if (!nod.Contains("AEC_PROPERTY_SET_DEFS")) { throw new Exception("Property Set Definitions Dictionary not found."); } // Open the Property Set Definitions Dictionary ObjectId propSetDictId = nod.GetAt("AEC_PROPERTY_SET_DEFS"); DBDictionary propSetDict = tr.GetObject(propSetDictId, OpenMode.ForRead) as DBDictionary; // Check if the Property Set already exists if (propSetDict.Contains(propertySetName)) { return propSetDict.GetAt(propertySetName); } // If it doesn't exist, create a new one propSetDict.UpgradeOpen(); PropertySetDefinition newPropSet = new PropertySetDefinition(); newPropSet.AlternateName = propertySetName; // Add properties dynamically based on input list foreach (var prop in properties) { // Convert C# type to Autodesk Civil 3D property data type Autodesk.Aec.PropertyData.DataType aecDataType = ConvertToAecDataType(prop.Type); // Create the property definition PropertyDefinition propertyDefinition = new PropertyDefinition { Name = prop.Name, DataType = aecDataType }; newPropSet.Definitions.Add(propertyDefinition); } // Add the new Property Set to the dictionary ObjectId newPropSetId = propSetDict.SetAt(propertySetName, newPropSet); tr.AddNewlyCreatedDBObject(newPropSet, true); return newPropSetId; } // Mapping function for data types private static Autodesk.Aec.PropertyData.DataType ConvertToAecDataType(Type type) { if (type == typeof(int)) return Autodesk.Aec.PropertyData.DataType.Integer; if (type == typeof(double) || type == typeof(float)) return Autodesk.Aec.PropertyData.DataType.Real; if (type == typeof(string)) return Autodesk.Aec.PropertyData.DataType.Text; if (type == typeof(bool)) return Autodesk.Aec.PropertyData.DataType.TrueFalse; if (type == typeof(DateTime)) return Autodesk.Aec.PropertyData.DataType.Text; throw new ArgumentException($"Unsupported data type: {type.Name}"); }

im trying to set values to the property set using this:

/// <summary> /// Attaches a Property Set to a Civil 3D object and assigns property values. /// </summary> /// <param name="tr">Active transaction</param> /// <param name="objectId">The ObjectId of the Civil 3D object</param> /// <param name="propertySetId">ObjectId of the Property Set</param> /// <param name="propertyValues">Dictionary containing property names and values</param> public static void AttachPropertySet(Transaction tr, ObjectId objectId, ObjectId propertySetId, Dictionary<string, object> propertyValues) { // Check if the object has the property set attached bool hasPropertySet = PropertyDataServices.GetAllPropertySetsUsingDefinition(propertySetId, false) .Contains(objectId); // Attach the property set if it doesn't exist if (!hasPropertySet) { DBObject dbObject = tr.GetObject(objectId, OpenMode.ForWrite); PropertyDataServices.AddPropertySet(dbObject, propertySetId); } // Retrieve the Property Set PropertySet propSet = tr.GetObject(propertySetId, OpenMode.ForWrite) as PropertySet; if (propSet == null) { throw new Exception("Failed to retrieve the Property Set."); } // Assign values to properties foreach (var kvp in propertyValues) { int propertyId = propSet.PropertyNameToId(kvp.Key); if (propertyId != -1) { propSet.SetAt(propertyId, kvp.Value); } else { throw new Exception($"Property '{kvp.Key}' not found in Property Set '{propSet.Name}'."); } } }

i always get propSet==null in here:
// Retrieve the Property Set
PropertySet propSet = tr.GetObject(propertySetId, OpenMode.ForWrite) as PropertySet;

for some reason i cant get the propertyset that i created...

what am i doing wrong? why cant i get the propertyset and set values to each elemtnt?

Re: Creating Property set and assigning properies value - .NET C#

or_levi5LSMC — Mon, 24 Mar 2025 14:58:43 GMT

i solved the problem.

i got help from this post ( using vb) :

https://forums.autodesk.com/t5/civil-3d-customization/property-sets-a-quick-how-to/td-p/12502844

and translated it to C#

topic Re: Creating Property set and assigning properies value - .NET C# in Civil 3D Customization Forum

Creating Property set and assigning properies value - .NET C#

Re: Creating Property set and assigning properies value - .NET C#