A Blazor WebAssembly Excel Web AddIn
This is a Microsoft Excel Web AddIn built in Blazor WebAssembly. I had a need to build an Microsoft Excel extension and I chose Blazor because:
- I did not want to use VSTO.
- The default Excel Web AddIn template uses .NET Framework 4.8 and I wanted to use something more modern.
This builds on the base Blazor WebAssembly "Weather Forecast" project that is created by the default Blazor template. I added some ideas that I found from around the internet and it works pretty well!
You can run this project:
- as a standard webpage in a browser
- in an Excel TaskPane after you load the manifest.xml file into Microsoft Excel
Important: To load the manifest.xml file, you'll have to setup the /manifest folder as a share on your machine and then use the Excel Trust Center to add that shared folder name to the Trusted Catalogs Table. (There are lots of tutorials about this.) You must do this step! Visual Studio won't side-load the addin like the default template does.