private void CloseModelLinks(ModelPath modelPath)
{
// Access transmission data in the given file
TransmissionData trans = TransmissionData.ReadTransmissionData(modelPath);
if (trans != null)
{
// collect all external references
var externalReferences = trans.GetAllExternalFileReferenceIds();
foreach (ElementId extRefId in externalReferences)
{
var extRef = trans.GetLastSavedReferenceData(extRefId);
if (extRef.ExternalFileReferenceType == ExternalFileReferenceType.RevitLink)
{
// var p = ModelPathUtils.ConvertModelPathToUserVisiblePath(extRef.GetPath());
//set data
trans.SetDesiredReferenceData(extRefId, extRef.GetPath(), extRef.PathType, false);
Debug.Write($"{extRef.GetPath().CentralServerPath} " +
$"{extRef.GetPath().ServerPath}");
}
}
// make sure the IsTransmitted property is set
trans.IsTransmitted = true;
// modified transmissoin data must be saved back to the model
TransmissionData.WriteTransmissionData(modelPath, trans);
}
}
// sample code from RevitAPI.chm entry
// on the TransmissionData class:
/// <summary>
/// Unload all Revit links.
/// This method will set all Revit links to be
/// unloaded the next time the document at the
/// given location is opened.
/// The TransmissionData for a given document
/// only contains top-level Revit links, not
/// nested links.
/// However, nested links will be unloaded if
/// their parent links are unloaded, so this
/// function only needs to look at the
/// document's immediate links.
/// </summary>
void UnloadRevitLinks(ModelPath location)
{
// access transmission data in the given Revit file
TransmissionData transData = TransmissionData
.ReadTransmissionData(location);
if (transData != null)
{
// collect all (immediate) external references in the model
ICollection <ElementId> externalReferences
= transData.GetAllExternalFileReferenceIds();
// find every reference that is a link
foreach (ElementId refId in externalReferences)
{
ExternalFileReference extRef
= transData.GetLastSavedReferenceData(refId);
if (extRef.ExternalFileReferenceType
== ExternalFileReferenceType.RevitLink)
{
// we do not want to change neither the
// path nor the path-type; we only want
// the links to be unloaded (shouldLoad
// = false)
transData.SetDesiredReferenceData(refId,
extRef.GetPath(), extRef.PathType, false);
}
}
// make sure the IsTransmitted property is set
transData.IsTransmitted = true;
// modified transmission data must be saved back to the model
TransmissionData.WriteTransmissionData(
location, transData);
}
else
{
TaskDialog.Show(
"Unload Links",
"The document does not have any transmission data");
}
}
public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Application app = uiapp.Application;
Document doc = uidoc.Document;
FilePath location = new FilePath("C:/file.rvt");
TransmissionData transData
= TransmissionData.ReadTransmissionData(
location);
if (null != transData)
{
// Collect all (immediate) external
// references in the model
ICollection <ElementId> externalReferences
= transData.GetAllExternalFileReferenceIds();
// Find every reference that is a link
foreach (ElementId refId in externalReferences)
{
ExternalFileReference extRef
= transData.GetLastSavedReferenceData(
refId);
if (extRef.ExternalFileReferenceType
== ExternalFileReferenceType.RevitLink)
{
// Change the path of the linked file,
// leaving everything else unchanged:
transData.SetDesiredReferenceData(refId,
new FilePath("C:/MyNewPath/cut.rvt"),
extRef.PathType, true);
}
}
// Make sure the IsTransmitted property is set
transData.IsTransmitted = true;
// Modified transmission data must be saved
// back to the model
TransmissionData.WriteTransmissionData(
location, transData);
}
else
{
TaskDialog.Show("Unload Links",
"The document does not have"
+ " any transmission data");
}
return(Result.Succeeded);
}