Overview: A Canvas Power App can easily connect to Excel held with SharePoint of OneDrive. It is great for getting values in, or for reading static values from a list.
Limitations:
1. You need to create a table in Excel to connect from Power Apps. The problem is the table cannot contain any formulas. I wanted to input a value, use Excel formulas to get a calculate risk value. It can't connect. The work around is to build the formulas in Power Apps but for my customer complex Excel sheet I don't want to spend weeks re-engineering the logic from code.
Excel: Trying to read field B19 that reference my calculation:
Power Apps: Trying to connect to the Excel table results in the "Excel file containing formula are currently not supported" error message:
2. Size limit, max 2 MB Excel file. This may be bigger now.
Summary: You can't work with large data sets and you can read from calculation cells in tables o Excel is fine for inputting into an Excel document that will be used as excel but pretty useless as a data store for Power Apps. Rather use a SharePoint list but this doesn't help if you actually want to use Excel as it contains complex logic.
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