51 lines
3.4 KiB
Markdown
51 lines
3.4 KiB
Markdown
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---
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source_files:
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- DataPRO/Modules/Hardware/AddEditHardware/Resources/TranslateExtension.cs
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- DataPRO/Modules/Hardware/AddEditHardware/Resources/StringResources.Designer.cs
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generated_at: "2026-04-16T04:36:34.790176+00:00"
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model: "Qwen/Qwen3-Coder-Next-FP8"
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schema_version: 1
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sha256: "df6887e304a35dc7"
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---
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# Resources
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## Documentation: `TranslateExtension` Markup Extension
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### 1. Purpose
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This module provides a WPF `MarkupExtension` (`TranslateExtension`) that enables declarative localization of UI strings in XAML. It allows UI elements (e.g., `TextBlock.Text`, `Button.Content`) to bind to localized string resources defined in `StringResources` by specifying a resource key. Its role is to abstract away manual resource lookup and support runtime culture switching in the `AddEditHardware` module’s UI.
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### 2. Public Interface
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- **`TranslateExtension(string key)`**
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Constructor. Accepts a string `key` corresponding to a resource name in `StringResources`. Stores the key for later lookup.
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- **`object ProvideValue(IServiceProvider serviceProvider)`**
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Overrides `MarkupExtension.ProvideValue`. Performs resource lookup at XAML load time:
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- Returns `"#stringnotfound#"` if `_key` is `null` or empty.
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- Returns the localized string from `StringResources.ResourceManager.GetString(_key)` if found.
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- Returns `"#stringnotfound# <key>"` (e.g., `"#stringnotfound# MyKey"`) if the key is non-empty but no matching resource exists.
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### 3. Invariants
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- `_key` is immutable after construction (no setter or mutation).
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- The extension **always returns a `string`** (per `[MarkupExtensionReturnType(typeof(string))]`).
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- Lookup is **case-sensitive** (relies on `ResourceManager.GetString(string)` behavior).
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- If a resource key is missing, the fallback string explicitly includes the original key for debugging visibility.
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### 4. Dependencies
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- **Depends on**:
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- `System.Windows.Markup` (for `MarkupExtension` base class).
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- `AddEditHardware.Resources.StringResources` (strongly-typed resource class generated from `.resx`).
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- `System.Resources.ResourceManager` (used internally via `StringResources.ResourceManager`).
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- **Used by**:
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- XAML files in the `AddEditHardware` module (e.g., `AddEditHardwareView.xaml`) to localize UI elements.
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- No direct runtime dependencies beyond WPF framework and the `StringResources` assembly.
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### 5. Gotchas
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- **Static resource resolution**: `ProvideValue` is called **once at XAML load time**, not at runtime. Changing `StringResources.Culture` *after* XAML is parsed will **not** update already-bound UI elements.
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- **Fallback format**: Missing keys yield `"#stringnotfound# <key>"`, which may appear in UI if keys are misspelled or missing from `.resx`. This is intentional for debugging but may confuse end users.
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- **No null-safety for `serviceProvider`**: The implementation does not validate `serviceProvider`, though WPF typically provides a valid instance.
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- **Hardcoded fallback**: The `"#stringnotfound#"` prefix is hardcoded and not configurable.
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- **No async or caching optimization**: Each usage triggers a `ResourceManager.GetString()` call; no caching is applied within `TranslateExtension` (though `ResourceManager` itself caches resources internally).
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- **Auto-generated resource class**: `StringResources` is auto-generated; manual edits will be overwritten. Resource keys must match exactly (case-sensitive) with entries in the `.resx` file.
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None identified beyond the above.
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