Inconsistent Percentage Field Handling Between UpdateAsync() and SystemUpdateAsync()

[mateusz-sintel]

Category

• Bug

Describe the bug

When updating a SharePoint list item with a Percentage field, the value format is inconsistent between UpdateAsync() and SystemUpdateAsync().

• Using UpdateAsync(): setting value 65 saves correctly as 65%.
• Using SystemUpdateAsync(): setting value 65 saves incorrectly as 6500%. Only by setting 0.65 does it save correctly as 65%.

Steps to reproduce

1. Create a SharePoint list with a Percentage column.
2. Call UpdateAsync() with value 65.
   • ✅ Saved correctly as 65%.
3. Call SystemUpdateAsync() with value 65.
   • ❌ Saved incorrectly as 6500%.
4. Call SystemUpdateAsync() with value 0.65.
   • ✅ Saved correctly as 65%.

Expected behavior

Both UpdateAsync() and SystemUpdateAsync() should use the same value format for percentage fields. Providing 65 should always result in 65%.

Environment details (development & target environment)

• SDK version: 1.15.0
• OS: Windows 11
• SDK used in: ASP.Net Web app
• Framework: .NET Core v8.x
• Additional details: SharePoint list with Percentage column type.