How to get information if parameter value in revit has changed

[Anonymous]

Hi community,

is there a way to get information if parameter value in revit has changed?

Maybe with the ChangeType Class?

At the end i need a list in my C# program e.g. with ID´s of all the elements where any value in my opened document has been changed.

Thanks for help

greetings

Michael

[pmcmm1]

Hello there,

I don't think there is a built-in function to do what you want. The only way to do what you want is to create a database of all the values you wanted to store, and then you could check which ones changed by comparing the new and old values.

To help you further it would be interesting to get a better overview of what you are trying to achieve.

Regards

[jeremytammik]

There are two ways to be informed when an element has been modified: the DocumentChanged event and the Dynamic Model Updater framework, or DMU.  The former is simple and informs of the modification after it has completed. The latter is more complicated, informs you beforehand and enables you to react to it and add your own modification to the same transaction. Here is a comparison between the two:

https://thebuildingcoder.typepad.com/blog/2016/01/idling-dmu-documentchanged-and-need-for-regen.html

Here are articles covering everything else you need to know about DMU:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.31

For your simple use, the DocumentChanged event sounds perfectly sufficient.