ispropertyreadonly (AutoLISP)

Returns the read-only state of an entity’s property

Supported Platforms: Windows and Mac OS

Signature

(ispropertyreadonly ename propertyname [or collectionName index name])

ename

Type: Ename (entity name)

Name of the entity being queried. The ename can refer to either a graphical or a non-graphical entity.

propertyname

Type: String

Name of the property being queried. For a list of all the valid property names of a given object, use dumpallproperties.

collectionName

Type: String

If the object is a collection object, the Collection name is passed here.

index

Type: Integer

The collection index being queried.

name

Type: String

The name of the property within the collection being queried.

Return Values

Type: Integer

1 is returned when the property is read-only; otherwise, 0 is returned when the property is writable.

Examples

The following example demonstrates how to check the read-only state of the Radius and Area properties of a circle.

(setq e1 (car (entsel "\nSelect an arc or circle: ")))
<Entity name: 10e2e4ba0>

(ispropertyreadonly e1 "Radius")
0

(ispropertyreadonly e1 "Area")
1