unoplatform/uno

Validate `XamlBindingHelper` helper behavior for known string conversions

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#17,410 opened on Jul 7, 2024

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difficulty/starter 🚀good first issuekind/bug

Description

Current behavior

We should validate Uno vs WinAppSDK behavior for conversions from string to the following types:

IconElement
SymbolIcon
PathIcon
RowDefinition
ColumnDefinition
RowDefinitionCollection
ColumnDefinitionCollection
PropertyPath
TargetPropertyPath
Run
InputScope
KeySpline
DoubleCollection
PointCollection
Transform
Brush
BrushCollection
Geometry
ImageSource
TransformGroup
MatrixTransform
SolidColorBrush
FontFamily
CacheMode
Uri
TimeSpan
Double
Float
Int32
Bool
Color
FontWeight

Some may already be correct, some may not.

Expected behavior

No response

How to reproduce it (as minimally and precisely as possible)

No response

Workaround

No response

Works on UWP/WinUI

None

Environment

No response

NuGet package version(s)

No response

Affected platforms

No response

IDE

No response

IDE version

No response

Relevant plugins

No response

Anything else we need to know?

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Contributor guide

Tech stack
csharp
Domain
testingdeveloper experience
Issue type
test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
C# basicsUno platform familiarityXAML binding knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Examine the conversion logic in XamlBindingHelper, likely in src/Uno.UI/DataBinding. For each type listed, write unit tests to verify correct string conversion. Compare with WinAppSDK behavior and document any discrepancies.