Loads an entire family and all its types/symbols into the document and provides a reference to the loaded family.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

C#
public bool LoadFamily( string filename, out Family family )

Visual Basic
Public Function LoadFamily ( _ filename As String, _ <OutAttribute> ByRef family As Family _ ) As Boolean

Visual C++
public: bool LoadFamily( String^ filename, [OutAttribute] Family^% family )

Parameters

filename: Type: System..::..String
The fully qualified filename of the Family file, usually ending in .rfa.

family: Type: Autodesk.Revit.DB..::..Family%
A reference to the family that was loaded if successful, otherwise nullNothingnullptra null reference (Nothing in Visual Basic).

Return Value

True if the entire family was loaded successfully into the project, otherwise False.

Remarks

Loading an entire family may take a considerable amount of time and memory. It is recommended that you use one of the LoadFamilySymbol() methods and only load those symbols that you need.

Examples

CopyC#

// Get the Revit library path as defined via the Options dialog - File Locations tab - Places button
string libraryPath = "";
application.Application.GetLibraryPaths().TryGetValue("Imperial Library", out libraryPath);

if (String.IsNullOrEmpty(libraryPath))
{
    libraryPath = "c:\\";   // If not have, use a default path.
}

// Allow the user to select a family file.
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = libraryPath;
openFileDialog1.Filter = "Family Files (*.rfa)|*.rfa";

// Load the family file using LoadFamily method and then give information.
if (DialogResult.OK == openFileDialog1.ShowDialog())
{
    Autodesk.Revit.DB.Family family = null;
    if (document.LoadFamily(openFileDialog1.FileName, out family))
    {
        String name = family.Name;
        TaskDialog.Show("Revit","Family file has been loaded. Its name is " + name);
    }
    else
    {
        TaskDialog.Show("Revit","Can't load the family file.");
    }
}

CopyVB.NET

' Get the Revit library path as defined via the Options dialog - File Locations tab - Places button
Dim libraryPath As String = ""
application.Application.GetLibraryPaths().TryGetValue("Imperial Library", libraryPath)

If [String].IsNullOrEmpty(libraryPath) Then
    ' If not have, use a default path.
    libraryPath = "c:\"
End If

' Allow the user to select a family file.
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = libraryPath
openFileDialog1.Filter = "Family Files (*.rfa)|*.rfa"

' Load the family file using LoadFamily method and then give information.
If DialogResult.OK = openFileDialog1.ShowDialog() Then
    Dim family As Autodesk.Revit.DB.Family = Nothing
    If document.LoadFamily(openFileDialog1.FileName, family) Then
        Dim name As [String] = family.Name
        TaskDialog.Show("Revit", "Family file has been loaded. Its name is " & name)
    Else
        TaskDialog.Show("Revit", "Can't load the family file.")
    End If
End If

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions..::..ArgumentException	Thrown when filename is nullNothingnullptra null reference (Nothing in Visual Basic) or empty.