Re: reload keynote file

Let's tackle this Revit keynote reloading challenge. You're right, KeynoteEntries.LoadKeynoteEntriesFromFile()requires more than just the file path. The KeyBasedTreeEntriesLoadContent parameter is key here, and it's often misunderstood. It's not about loading the keynote file directly; it's about preparing a container to receive the keynote data. Think of it as setting the stage before the actual import.

Here's a breakdown of the process and a robust C# code example for your Revit add-in:

using Autodesk.Revit.DB;using Autodesk.Revit.UI;using System;using System.IO;namespaceRevitKeynoteReload
{
    [Transaction(TransactionMode.Manual)]publicclassReloadKeynotes : IExternalCommand
    {public Result Execute(ExternalCommandData commandData, refstring message, ElementSet elements)
        {
            UIApplication uiapp = commandData.Application;
            Document doc = uiapp.ActiveUIDocument.Document;// 1. Get the Keynote file path.  (You already have this)string keynoteFilePath = GetKeynoteFilePath(); // Replace with your logicif (string.IsNullOrEmpty(keynoteFilePath) || !File.Exists(keynoteFilePath))
            {
                TaskDialog.TaskDialog.Show("Error", "Keynote file not found.");return Result.Failed;
            }try
            {// 2. Create the KeyBasedTreeEntriesLoadContent
                KeyBasedTreeEntriesLoadContent loadContent = new KeyBasedTreeEntriesLoadContent(null); // Important: Pass null here!// 3. Load the keynote entries into the content.  This is where the magic happens.
                KeynoteEntries.LoadKeynoteEntriesFromFile(doc, keynoteFilePath, loadContent);// 4. Check the load status.  Crucial for error handling.if (loadContent.LoadStatus != ExternalResourceLoadStatus.Success)
                {
                    TaskDialog.TaskDialog.Show("Error", $"Keynote load failed: {loadContent.LoadStatus}");return Result.Failed;
                }// 5. Apply the loaded entries to the document. This updates Revit's keynote table.
                KeynoteEntries.LoadKeynoteEntries(doc, loadContent);// 6. Optional: Regenerate the document to reflect changes immediately.
                doc.Regenerate();


                TaskDialog.TaskDialog.Show("Success", "Keynotes reloaded successfully.");return Result.Succeeded;
            }
            catch (Exception ex)
            {
                TaskDialog.TaskDialog.Show("Error", $"An error occurred: {ex.Message}");return Result.Failed;
            }
        }// Helper function (replace with your actual path retrieval logic)privatestringGetKeynoteFilePath()
        {// Example: Get from a settings file, user input, etc.// For demonstration, I'm using a hardcoded path.  NEVER do this in production.return@"C:\Your\Keynote\File.txt"; // Replace with your actual path retrieval method!
        }
    }
}

Explanation and Key Improvements:

1. KeyBasedTreeEntriesLoadContent(null): The constructor takes an object proxy. Crucially, you should pass null here. This is the most common point of confusion. The proxy is used internally by Revit, and providing a value yourself is usually unnecessary and can lead to issues.

2. Error Handling: The code now includes a check for loadContent.LoadStatus. This is essential. The LoadKeynoteEntriesFromFile method might succeed even if the file format is incorrect. Checking the status lets you catch these errors and provide informative messages to the user.

3. KeynoteEntries.LoadKeynoteEntries(doc, loadContent): This is the second load method. It takes the loadContent that you populated and actually applies the keynote data to the Revit document.

4. doc.Regenerate(): This is optional but highly recommended. It forces Revit to update the keynote tags and other elements that rely on the keynote table. This ensures the changes are immediately visible to the user.

5. Path Retrieval: The GetKeynoteFilePath() function is a placeholder. Replace this with your actual logic for getting the keynote file path. This could involve reading from a configuration file, prompting the user with a file dialog, or retrieving it from a shared parameter. Do not hardcode paths in production code!

6. Transaction: The [Transaction(TransactionMode.Manual)] attribute is essential. Keynote changes require a transaction.

Practical Demonstration:

1. Create a new Revit add-in project.
2. Add the code above.
3. Replace the placeholder path in GetKeynoteFilePath() with the actual path to your keynote file.
4. Build the add-in.
5. In Revit, run the command.

This revised approach addresses the core issue and provides a more robust and practical solution for reloading keynote files in your Revit add-ins. Remember to handle file paths dynamically and always check the LoadStatus for proper error management. This will make your add-in more reliable and user-friendly.

I would be interested to hear whether this helps and whether it works as claimed. Please let us know how you end up solving this. Thank you, and have a nice weekend.