FilteredElementCollector allows you to access all kinds of Elements in Revit projects – model elements, families, geometries, views – based on specific criteria. Long chains of FilteredElementCollector methods can be daunting. But don’t worry – breaking them down clarifies a lot. Actually, most cases can be resolved with the image below. 📌 TLDR – Summary […]
You can insert families programmatically at points, on faces or lines, or create hosted families. Inserting Families is the core of creating Revit Elements – and a must-know for Revit plugin developers. In this post: code, examples, and everything you need to know about Inserting Families. 📌 TLDR – Summary Upfront: To insert Families programmatically:
Your code can’t modify Revit projects without a Transaction. Knowing how to use transactions can save you from frustrating code-breaking errors. In this post: code, examples, and everything you need to know about Transactions. 📌 TLDR – Summary Upfront: Use the Transaction class when your code modifies Revit projects (e.g., create or edit elements). ➡️
Selecting elements or geometries in your plugin is possible with the Selection class. 📌 TLDR – Summary Upfront: Use Selection class to: ➡️ Get currently selected elements with Selection.GetElementIds(). ➡️ Prompt the user to select elements with various Pick[…] methods (PickObject, PickObjects, PickPoint, …). ➡️ Set selected elements programmatically with Selection.SetElementIds(). The Selection Filter allows you
Revit API offers several types of buttons to enhance your plugin’s UI: PushButton (most common), PulldownButton, SplitButton, and RadioButtonGroup. 📌 TLDR – Summary Upfront: ➡️ Use PushButtons for single commands. ➡️ Use PulldownButtons and SplitButtons to group similar commands. ➡️ Use RadioButtonGroups to let users set preferences. Avoid repetitions in command classes: use C# inheritance
You can add your own panels, tabs, buttons, and other controls to Revit menu when creating a Revit plugin. You can customize the controls with images, tooltips, or extended contextual help. However, especially in the new Revit 2025 .NET API, there are some caveats. 📌 TLDR – Summary Upfront: Modify the Revit menu (e.g., add
Revit API provides three plugin types: Command, Application, and DBApplication. They have various purposes and customization options. 📌 TLDR – Summary Upfront: Revit API has 3 plugin types: ➡️ Command (IExternalCommand): Simplest. Great for testing and single-purpose methods. ➡️ Application (IExternalApplication): The “typical plugin”. Customization of ribbon and buttons. ➡️ DBApplication (IExternalDBApplication): Restricted version of