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windows-data-storage

Windows アプリ開発 (Windows App SDK / WinRT) のファイル・設定・データ保存リファレンス。

Windows.Storage の StorageFile, StorageFolder, IStorageItem, FileIO, PathIO, CachedFileManager, DataReader, DataWriter, BasicProperties。

ApplicationData, ApplicationDataContainer, ApplicationDataCompositeValue のローカル・ローミング設定。

FileOpenPicker, FileSavePicker, FolderPicker, KnownFolders, StorageApplicationPermissions (FutureAccessList / MostRecentlyUsedList)。

JsonObject, JsonArray, XmlDocument, SQLite, EF Core, Microsoft.Data.SqlClient (SQL Server), Cosmos DB, MySQL, MongoDB 接続。

The English summary is being prepared. Showing the original description.

Works withMySQLMongoDB
See how to install

Files included (64)

  • SKILL.md7.8 KB
  • references/app-data-settings/app-data-versioning-and-migration.md1.5 KB
  • references/app-data-settings/application-data-composite-value.md2.5 KB
  • references/app-data-settings/application-data-container.md2.5 KB
  • references/app-data-settings/application-data.md4.6 KB
  • references/app-data-settings/packaged-vs-unpackaged-app-data.md2.0 KB
  • references/app-data-settings/README.md1.3 KB
  • references/app-data-settings/settings-limits-and-roaming.md1.7 KB
  • references/app-data-settings/windows-app-sdk-application-data.md3.9 KB
  • references/data-serialization/application-data-storage.md3.1 KB
  • references/data-serialization/caching-strategy.md2.6 KB
  • references/data-serialization/common-file-query.md1.9 KB
  • references/data-serialization/connect-winui-app-to-database.md4.0 KB
  • references/data-serialization/cosmos-db-data-access.md2.9 KB
  • references/data-serialization/data-access-overview.md2.1 KB
  • references/data-serialization/ef-core-sqlite-provider.md3.4 KB
  • references/data-serialization/json-array.md2.3 KB
  • references/data-serialization/json-object.md3.0 KB
  • references/data-serialization/json-value.md2.1 KB
  • references/data-serialization/json-vs-system-text-json.md2.4 KB
  • references/data-serialization/mongodb-database.md1.8 KB
  • references/data-serialization/mysql-database.md1.7 KB
  • references/data-serialization/query-options.md4.7 KB
  • references/data-serialization/README.md4.2 KB
  • references/data-serialization/sql-server-database.md4.4 KB
  • references/data-serialization/sqlite-data-access.md5.0 KB
  • references/data-serialization/storage-file-query-result.md2.4 KB
  • references/data-serialization/storage-folder-item-query-result.md3.7 KB
  • references/data-serialization/xml-document.md2.7 KB
  • references/pickers-access/file-access-permissions.md3.5 KB
  • references/pickers-access/file-open-picker.md3.0 KB
  • references/pickers-access/file-save-picker.md3.1 KB
  • references/pickers-access/folder-picker.md2.6 KB
  • references/pickers-access/hwnd-initialization.md2.6 KB
  • references/pickers-access/known-folders.md3.1 KB
  • references/pickers-access/README.md1.8 KB
  • references/pickers-access/storage-application-permissions.md3.0 KB
  • references/pickers-access/windows-app-sdk-pickers.md3.2 KB
  • references/storage-files/access-sd-card.md3.3 KB
  • references/storage-files/cached-file-manager.md1.7 KB
  • references/storage-files/data-reader-writer.md3.3 KB
  • references/storage-files/downloads-folder.md2.9 KB
  • references/storage-files/file-io.md2.6 KB
  • references/storage-files/file-properties.md2.8 KB
  • references/storage-files/irandom-access-stream.md2.5 KB
  • references/storage-files/istorage-item.md1.8 KB
  • references/storage-files/path-io.md2.3 KB
  • references/storage-files/README.md3.7 KB
  • references/storage-files/storage-file.md4.0 KB
  • references/storage-files/storage-folder.md3.4 KB
  • references/storage-files/storage-item-thumbnail.md1.9 KB
  • references/storage-files/storage-library-change-tracker.md4.6 KB
  • references/storage-files/storage-library.md3.5 KB
  • references/storage-files/storage-provider-sync-root-manager.md4.6 KB
  • references/storage-files/storage-stream-transaction.md1.7 KB
  • references/storage-files/streamed-file-content.md3.1 KB
  • references/storage-files/system-io-vs-windows-storage.md3.5 KB
  • samples/ef-core-local-database.md2.7 KB
  • samples/fast-file-enumeration.md3.6 KB
  • samples/README.md920 B
  • samples/sql-server-direct-access.md7.1 KB
  • samples/sqlite-local-database.md5.2 KB
  • scripts/install.md3.3 KB
  • scripts/README.md230 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

Windows データ・ストレージ リファレンス

Windows App SDK / WinRT が提供するファイル操作・アプリデータ・ファイルピッカー・データシリアライズの公式ドキュメントを蒸留したリファレンス。 デスクトップアプリでのファイル読み書き、設定の永続化、ユーザー選択によるファイルアクセス、JSON / XML / SQLite を使ったデータ保存を網羅する。 ユーザーのタスクに応じて適切な README.md を読み、そこから個別ファイルへ辿ること。

ディレクトリ構成

skills/windows-data-storage/
  SKILL.md
  references/
    storage-files/
      README.md
      storage-file.md
      storage-folder.md
      istorage-item.md
      file-io.md
      path-io.md
      cached-file-manager.md
      storage-stream-transaction.md
      irandom-access-stream.md
      data-reader-writer.md
      storage-item-thumbnail.md
      storage-library.md
      storage-library-change-tracker.md
      storage-provider-sync-root-manager.md
      downloads-folder.md
      streamed-file-content.md
      access-sd-card.md
      system-io-vs-windows-storage.md
      file-properties.md
    app-data-settings/
      README.md
      application-data.md
      application-data-container.md
      application-data-composite-value.md
      windows-app-sdk-application-data.md
      settings-limits-and-roaming.md
      packaged-vs-unpackaged-app-data.md
      app-data-versioning-and-migration.md
    pickers-access/
      README.md
      file-open-picker.md
      file-save-picker.md
      folder-picker.md
      hwnd-initialization.md
      windows-app-sdk-pickers.md
      storage-application-permissions.md
      known-folders.md
      file-access-permissions.md
    data-serialization/
      README.md
      json-object.md
      json-array.md
      json-value.md
      xml-document.md
      json-vs-system-text-json.md
      sqlite-data-access.md
      ef-core-sqlite-provider.md
      application-data-storage.md
      caching-strategy.md
      storage-file-query-result.md
      query-options.md
      common-file-query.md
      storage-folder-item-query-result.md
      data-access-overview.md
      connect-winui-app-to-database.md
      sql-server-database.md
      cosmos-db-data-access.md
      mysql-database.md
      mongodb-database.md
  samples/
    README.md
    sqlite-local-database.md
    ef-core-local-database.md
    sql-server-direct-access.md
    fast-file-enumeration.md
  scripts/
    README.md
    install.md

探索手順

タスクからカテゴリを引き、カテゴリの README.md で目的のページを特定する:

  1. 下記マッピング表でタスクに対応するカテゴリを探す
  2. そのカテゴリの references/{category}/README.md を参照して目的のページを特定する
  3. 該当ページの .md を Read して詳細を確認する

タスク → カテゴリ マッピング

タスクカテゴリ参照 README
StorageFile / StorageFolder でファイル・フォルダーの取得・作成・削除・列挙をしたいstorage-filesreferences/storage-files/README.md
FileIO / PathIO / DataReader / DataWriter でテキスト・バイナリの読み書きをしたいstorage-filesreferences/storage-files/README.md
CachedFileManager / IRandomAccessStream / StorageStreamTransaction でストリームの整合性を扱いたいstorage-filesreferences/storage-files/README.md
System.IO と Windows.Storage のどちらを使うか判断したいstorage-filesreferences/storage-files/README.md
ApplicationData / ApplicationDataContainer でローカル・ローミング設定を保存したいapp-data-settingsreferences/app-data-settings/README.md
パッケージ化・非パッケージ化アプリでの ApplicationData の違いを知りたいapp-data-settingsreferences/app-data-settings/README.md
アプリデータのバージョニング・移行・サイズ制限を扱いたいapp-data-settingsreferences/app-data-settings/README.md
FileOpenPicker / FileSavePicker / FolderPicker でユーザーにファイル・フォルダーを選択させたいpickers-accessreferences/pickers-access/README.md
デスクトップアプリでピッカーの HWND 初期化・WindowId 設定をしたいpickers-accessreferences/pickers-access/README.md
KnownFolders / StorageApplicationPermissions でアクセス許可・既知フォルダーを扱いたいpickers-accessreferences/pickers-access/README.md
JsonObject / JsonArray / JsonValue / XmlDocument で構造化データをパース・生成したいdata-serializationreferences/data-serialization/README.md
SQLite / EF Core でローカルデータベースを構築したいdata-serializationreferences/data-serialization/README.md
QueryOptions / CommonFileQuery / StorageFileQueryResult でファイルクエリ・キャッシュ戦略を扱いたいdata-serializationreferences/data-serialization/README.md
StorageFolderQueryResult / StorageItemQueryResult でフォルダー・混在アイテムのクエリ結果を列挙したいdata-serializationreferences/data-serialization/README.md
SQL Server / Cosmos DB / MySQL / MongoDB に Windows アプリから接続したいdata-serializationreferences/data-serialization/README.md
業務アプリ (LOB) の DB アクセス構成(サービス層・EF Core・オフライン同期・資格情報保護)を決めたいdata-serializationreferences/data-serialization/README.md
ファイルの基本・拡張プロパティを取得、インデクサーで高速取得したいstorage-filesreferences/storage-files/README.md
動作する実装例を見たいsamplessamples/README.md
NuGet パッケージの導入コマンドを知りたいscriptsscripts/README.md

出典: learn.microsoft.com (en-us) Windows apps docs、2026-10-16 取得。

このスキルは Windows App SDK / WinRT のファイル・設定・データ保存 API のみを扱う。コントロール UI は windows-winui-controls、ライフサイクル・ウィンドウ・通知は windows-app-sdk が担当し、いずれもここでは扱わない。共有業務データの認証付きサービス層(ID / API 呼び出し)もこのスキルの範囲外。

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