工作流活动

属性​

常见​

• “显示名称”- 活动的显示名称。

输入​

• SpecialFolder - The SpecialFolder whose path is to be retrieved. Select from the available Environment.SpecialFolder enumeration values.

输出​

• FolderPath - The full folder path of the selected SpecialFolder. Returns an empty string if the folder is not available on the current platform.

其他​

• “私有”- 选中后将不再以“Verbose”级别记录变量和参数的值。

Platform-specific behavior​

Windows environment​

• All standard special folders resolve to their expected Windows paths (e.g., Desktop, ProgramFiles, System, ApplicationData).
• Windows-only folders such as ProgramFiles, ProgramFilesX86, Windows, AdminTools, and CommonProgramFiles return valid paths.
• Folders typically resolve to locations under C:\Users\<username> or system directories like C:\Windows.

Cross-platform environment​

• Only a subset of special folders resolve to valid paths; many Windows-specific folders return an empty string.
• Folder paths follow XDG Base Directory specifications on Linux (using environment variables like $XDG_CONFIG_HOME, $XDG_DATA_HOME) and macOS conventions.
• The activity never creates directories; it only resolves known locations based on the operating system.
• If a folder cannot be resolved on the current platform, the activity returns an empty string (not null) and does not throw an exception.

Common folder mappings​

Cross-platform folders​

• UserProfile - Windows: C:\Users\<user>, Linux/macOS: $HOME
• Desktop - Windows: C:\Users\<user>\Desktop, Linux/macOS: ~/Desktop (if present)
• MyDocuments - Windows: C:\Users\<user>\Documents, Linux/macOS: ~/Documents (if present)
• ApplicationData - Windows: %APPDATA% (Roaming), Linux/macOS: ~/.config (XDG)
• LocalApplicationData - Windows: %LOCALAPPDATA%, Linux/macOS: ~/.local/share (XDG)

Windows-only folders​

• ProgramFiles, ProgramFilesX86 - Windows program installation directories
• System, SystemX86, Windows - Windows system directories
• CommonApplicationData - Windows: %PROGRAMDATA%, Linux/macOS: empty string
• CommonProgramFiles, CommonProgramFilesX86 - Shared program files
• AdminTools, Templates, Favorites, Recent, SendTo, StartMenu, Startup - Windows shell folders

Platform-specific considerations​

• Fonts - Windows: %WINDIR%\Fonts, macOS: /System/Library/Fonts (system) or /Library/Fonts (user), Linux: varies by distribution, often returns empty string
• Desktop, MyDocuments - May return empty string if the directory doesn't exist in the user profile, even on platforms where they are expected

最佳实践​

• Always validate the result: Check for string.IsNullOrEmpty(folderPath) before using the returned path, as many folders may not exist on certain platforms.
• For cross-platform workflows: Prefer using UserProfile, ApplicationData, or LocalApplicationData for storing application data, as these have consistent mappings across platforms.
• Avoid Windows-only folders: Don't rely on folders like ProgramFiles, System, or Windows in cross-platform workflows, as they will return empty strings on Linux/macOS.
• Handle missing directories: The activity does not create directories. If you need to write to a special folder, verify it exists and create it if necessary.
• Test on target platforms: Folder availability can vary based on user profile configuration, especially for presence-sensitive folders like Desktop and Documents.
• Containerized environments: Be aware that containerized or restricted environments may return empty strings for more folders due to missing or inaccessible paths.

返回值​

• Returns the full folder path as a string if the special folder is available on the current platform.
• Returns an empty string (string.Empty) if the folder cannot be resolved on the current platform.
• Never returns null and does not throw exceptions for unsupported folders.

示例场景​

Scenario 1: Retrieving UserProfile​

• Windows: Returns C:\Users\<username>
• Linux/macOS: Returns /home/<username> or /Users/<username>

Scenario 2: Retrieving ProgramFiles​

• Windows: Returns C:\Program Files
• Linux/macOS: Returns empty string

Scenario 3: Retrieving ApplicationData​

• Windows: Returns C:\Users\<username>\AppData\Roaming
• Linux/macOS: Returns ~/.config (XDG specification)

Scenario 4: Retrieving Desktop when folder doesn't exist​

• All Platforms: Returns empty string if the Desktop folder is not present in the user profile