Priority: P1 (Transforms)

Problem

ASCX files with templated controls (Repeater, DataList, GridView) use , , blocks. Layer 1 leaves these unchanged, requiring manual conversion to Blazor RenderFragment syntax.

Scope

• Detect templated control blocks
• Extract template children
• Rewrite template expressions: <%# Eval(...) %> → @item.Property
• Add Context= parameter to item templates
• Convert Web Forms binding syntax to Blazor

Deliverables

1. ContentTemplateUnwrapperTransform in src/BlazorWebFormsComponents.Cli/Transforms/Markup/
2. Template expression rewriter (Eval, GetValue, XPath handling)
3. Register in Program.cs and test pipeline
4. Unit tests: tests/BlazorWebFormsComponents.Cli.Tests/Transforms/Markup/ContentTemplateUnwrapperTransformTests.cs
5. Integration test with real ASCX controls

Acceptance Criteria

✅ Templates unwrapped to Blazor equivalents
✅ Data-binding expressions rewritten correctly
✅ Context= parameter added to item templates
✅ Non-template markup preserved
✅ Warnings emitted for unsupported patterns
✅ Unit tests pass
✅ Integration test shows reduced L2 repair time

Related Track Document

See dev-docs/control-migration/track-contenttemplate.md