Revit 2026 API
EntityClear(String) Method |
Resets the field to its default value.
Namespace: Autodesk.Revit.DB.ExtensibleStorage
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)
Syntax
public void Clear( string fieldName )
Public Sub Clear ( fieldName As String )
public: void Clear( String^ fieldName )
member Clear : fieldName : string -> unit
Parameters
- fieldName String
- The name of the field to clear.

Exception | Condition |
---|---|
ArgumentException | The name matches no field in this Entity's Schema. -or- This field's subschema prevents writing. |
ArgumentNullException | A non-optional argument was null |
InvalidOperationException | This Entity is invalid. |

The default value is zero for numeric fields, invalid value for identifiers and
entities, and empty for strings and containers.
This method is a shortcut that will look up the field by name. If you want to call it
on many entities, it is faster if you look up the field yourself.
See Also