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docs/ai/DataPRO/Modules/Database/DatabaseServices/Converters.md

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+---
+source_files:
+  - DataPRO/Modules/Database/DatabaseServices/Converters/DbTypeToVisibilityConverter.cs
+generated_at: "2026-04-17T16:44:02.991131+00:00"
+model: "zai-org/GLM-5-FP8"
+schema_version: 1
+sha256: "f33cb579dbf56959"
+---
+
+# Documentation: DbTypeToVisibilityConverter
+
+## 1. Purpose
+
+`DbTypeToVisibilityConverter` is a WPF `IMultiValueConverter` that determines the visibility of UI elements based on database connection type state. It bridges the view layer (`DatabaseStatusBarView`) and view model layer (`DatabaseStatusBarViewModel`) to conditionally show or hide elements depending on the current `DbType` configuration and connection status. This converter is specifically designed for the database status bar component in the application.
+
+## 2. Public Interface
+
+### `DbTypeToVisibilityConverter` (class)
+
+Implements: `IMultiValueConverter`
+
+#### `Convert(object[] values, Type targetType, object parameter, CultureInfo culture)`
+
+**Signature:**
+```csharp
+public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+```
+
+**Behavior:** Converts database type information to a `Visibility` value.
+
+- **`values[0]`**: Expected to be an integer value castable to `DbType` enum (the target database type being evaluated for visibility).
+- **`values[1]`**: Expected to be a `DatabaseStatusBarView` instance.
+- **Returns:** `Visibility.Visible` or `Visibility.Collapsed` based on the following logic:
+  - If `view.DataContext` is `null`, returns `Visibility.Collapsed`.
+  - If `vm.DatabaseType` is `DbType.RemoteOnly`: Visible only when `dbType == DbType.RemoteOnly`.
+  - If `vm.DatabaseType` is `DbType.LocalOnly`: Visible only when `dbType == DbType.LocalOnly`.
+  - If `vm.DatabaseType` is `DbType.RemoteLocalHybrid`:
+    - When `vm.RemoteConnected` is `true`: Visible only when `dbType == DbType.RemoteOnly`.
+    - When `vm.RemoteConnected` is `false`: Visible only when `dbType == DbType.RemoteLocalHybrid`.
+  - All other cases: Returns `Visibility.Collapsed`.
+
+#### `ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)`
+
+**Signature:**
+```csharp