The ExternalDefinition object adds properties specific to Autodesk Revit shared parameter definitions.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Syntax
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Remarks
The ExternalDefinition object can be created by a definition Group object from a shared parameters file. External parameter definition must belong to a Group which is nothing more than a collection of shared parameter definitions. The following process should be followed to add a parameter to an element: Open the shared parameters file, via the Application.OpenSharedParameterFile() method. Access an existing or create a new group, via the DefinitionFile.Groups property. Access an existing or create a new external parameter definition, via the DefinitionGroup.Definitions property. Create a new Binding object with the categories to which the parameter will be bound using an InstanceBinding or a TypeBinding object. Finally add the binding and definition to the document using the Document.ParameterBindings object.
Examples
Copy C# private void ReadEditExternalParam(DefinitionFile file)
{
// get ExternalDefinition from shared parameter file
DefinitionGroups myGroups = file.Groups;
DefinitionGroup myGroup = myGroups.get_Item("MyGroup");
if (myGroup != null)
{
ExternalDefinition myExtDef = myGroup.Definitions.get_Item("MyParam") as ExternalDefinition;
if (myExtDef != null)
{
DefinitionGroup newGroup = myGroups.get_Item("AnotherGroup");
if (newGroup != null)
{
// change the OwnerGroup of the ExternalDefinition
myExtDef.OwnerGroup = newGroup;
}
}
}
}Private Sub ReadEditExternalParam(file As DefinitionFile)
' get ExternalDefinition from shared parameter file
Dim myGroups As DefinitionGroups = file.Groups
Dim myGroup As DefinitionGroup = myGroups.Item("MyGroup")
If myGroup IsNot Nothing Then
Dim myExtDef As ExternalDefinition = TryCast(myGroup.Definitions.Item("MyParam"), ExternalDefinition)
If myExtDef IsNot Nothing Then
Dim newGroup As DefinitionGroup = myGroups.Item("AnotherGroup")
If newGroup IsNot Nothing Then
' change the OwnerGroup of the ExternalDefinition
myExtDef.OwnerGroup = newGroup
End If
End If
End If
End Sub