DP44/enriched-qwen3-coder-next/DataPRO/Modules/Reports/PedestrianAndHeadReports/Resources.md

source_files, generated_at, model, schema_version, sha256

source_files	generated_at	model	schema_version	sha256
DataPRO/Modules/Reports/PedestrianAndHeadReports/Resources/TranslateExtension.cs DataPRO/Modules/Reports/PedestrianAndHeadReports/Resources/StringResources.Designer.cs	2026-04-16T04:55:02.133936+00:00	Qwen/Qwen3-Coder-Next-FP8	1	b181762eeb96b72d

Resources

Documentation: TranslateExtension Module

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1. Purpose

This module provides a WPF MarkupExtension (TranslateExtension) to enable declarative, localized string resolution in XAML. It allows UI elements (e.g., TextBlock.Text, Header, etc.) to bind to resource keys and automatically retrieve the corresponding localized string at runtime from StringResources, falling back to a standardized placeholder if the key is missing or empty. Its role is to centralize and simplify internationalization (i18n) for the PedestrianAndHeadReports module, ensuring consistent handling of localized UI text without requiring code-behind or manual resource lookups.

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2. Public Interface

TranslateExtension class

Namespace: PedestrianAndHeadReports.Resources
Inherits: System.Windows.Markup.MarkupExtension

Constructor

public TranslateExtension(string key)

• Purpose: Initializes a new instance with the specified resource key.
• Parameters:
  • key: The string key used to look up a localized value in StringResources.ResourceManager.

ProvideValue method

public override object ProvideValue(IServiceProvider serviceProvider)

• Purpose: Returns the localized string corresponding to _key, or a fallback value if lookup fails.
• Behavior:
  • If _key is null or empty → returns "#stringnotfound#".
  • Otherwise, calls StringResources.ResourceManager.GetString(_key).
    • If the result is non-null → returns the localized string.
    • If the result is null → returns "#stringnotfound# " + _key (i.e., the placeholder followed by a space and the original key).
• Return type: object (always a string per [MarkupExtensionReturnType(typeof(string))]).

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3. Invariants

• Key must be non-null/non-empty for meaningful lookup:
  Empty or null keys are explicitly handled and return "#stringnotfound#"—no exception is thrown.
• Fallback format is deterministic:
  When a key is missing, the output is always "#stringnotfound# <key>". This makes missing keys visually identifiable in the UI.
• Thread-safety of resource access is assumed:
  StringResources.ResourceManager.GetString(...) is used directly; while ResourceManager is thread-safe for concurrent reads, the extension itself does not enforce synchronization (but WPF’s MarkupExtension lifecycle typically avoids concurrent ProvideValue calls per instance).
• Return type is always a string:
  Guaranteed by [MarkupExtensionReturnType(typeof(string))] and implementation.

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4. Dependencies

Dependencies of this module:

• System.Windows.Markup (WPF framework): Required for MarkupExtension base class and MarkupExtensionReturnTypeAttribute.
• PedestrianAndHeadReports.Resources.StringResources:
  • Used via StringResources.ResourceManager.GetString(...).
  • StringResources is auto-generated from .resx files and contains strongly-typed properties (e.g., Acceleration, TestDate) backed by the ResourceManager.

Dependencies on this module:

• XAML files in the PedestrianAndHeadReports module (inferred):
  • Likely used in XAML as {local:Translate KeyName} to localize UI elements.
  • Example: <TextBlock Text="{local:Translate Acceleration}" /> → resolves to localized string for "Acceleration" (e.g., "加速度" in Japanese).

External dependencies:

• .NET Framework 4.0+ (inferred from runtime version in StringResources.Designer.cs header).

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5. Gotchas

• No caching of resolved values per instance:
  Each call to ProvideValue performs a fresh ResourceManager.GetString(_key) lookup. While ResourceManager caches internally, repeated use of the same TranslateExtension instance in different contexts (e.g., data templates) may re-resolve unnecessarily.
• Missing keys produce visible placeholders in UI:
  The "#stringnotfound# <key>" fallback is intentional for debugging but may appear in production if resource keys are mistyped or missing in .resx files.
• Case sensitivity of keys:
  Resource keys (e.g., "Acceleration", "Acceleration ") are case-sensitive. A mismatch in casing (e.g., "acceleration") will result in a null lookup and fallback.
• No support for parameterized strings (e.g., string.Format):
  The extension only supports simple key → string lookup. It does not handle placeholders (e.g., "Hello {0}") or arguments.
• Auto-generated StringResources class:
  Changes to the underlying .resx file require regeneration of StringResources.Designer.cs. If keys are renamed/removed in .resx but referenced in XAML via TranslateExtension, they will fall back to "#stringnotfound#...".
• No culture override support in TranslateExtension:
  While StringResources.Culture can be set globally, TranslateExtension does not expose or accept a culture parameter—respects only the current UI thread’s CurrentUICulture.

None identified from source alone.
(Note: The above are inferred from standard behavior of ResourceManager, WPF MarkupExtension, and common localization patterns—not from explicit warnings in the source.)