My first "Hello World" addin for ETABs is shown above. No matter how many times you see it, it is always satisfying to get Hello World to print out.

To make the addin, I followed Jeremy's examples on his website. Big thanks to him and his github for walking me through the initial setup process for the ETABs API with C#.

The examples that he presented were from the 2017 community edition of visual studio, so there were a few buttons that had been moved around in the 2019 version that I was using.

First, the events tab that is shown in his examples has moved into its drop down menu, indicated by a lightning bolt. This threw me off for a bit until I found the events tab in its new home.

Also, upon re-compling the application, while having ETABs open, I would get this error:

I was able to solve this by navigating into the big/debug directory and removing the ETABS_Plugin.pdb and ctrl+alt+deleting to kill ETABs. Some weird bug that I will need to dig into more, just be sure to close ETABs before recompiling the code.

The Future

I am hoping to make the diaphragm slicer into a full fledged application. This will make the application much more approachable for others in the office and out in the interwebs.

Things I will need to research in C#, let me know if you have suggestions on these topics:

  • A matrix math package for converting between local and global coordinates
  • A graphing package in C#
  • Learning windows forms more in depth

I uploaded the code on github (basically a copy of Jeremy's code) if you want to take a look.

ETABs C Sharp

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  • Latest Comments
  • retug on RAM to RevitĀ® - R2R - (part 2) -

    Great ideas Celt.

    Mapping process done on beam ends would be a good alternate user option.

    With regards to the graphics, I agree, something to make deltas pop a little more visually would be nice.


  • Celt83 on RAM to RevitĀ® - R2R - (part 2) -

    Awesome stuff!

    Some possible additions that may be helpful.

    - allow the mapping process to be done against beam ends and not just grids.

    - you chose great colors for the beam maps, if you go one step further with the graphics and allow for a “multiply” blend mode all ...

  • retug on Diaphragm Slicer New and Improved -

    Hi Trenno, I just uploaded a new .dll file to github that has metric units included. Give it a whirl, let me know if you have any trouble on the install. I think it should be as easy as downloading the .dll file and adding the file path to the