使用Delphi,如何访问等效于.NET的System.Environment.SpecialFolder.LocalApplicationData变量(可在任何Windows版本上使用)?我以为我可以做:
dir := GetEnvironmentVariable('LOCALAPPDATA');
这可以在Vista上运行,但是XP至少在我的测试机上似乎没有默认设置该环境变量。
最佳答案
在Delphi中,特殊的系统文件夹路径常量在ShlObj.DCU中定义,并以CSIDL_的形式引用,后跟符号名称。
例子:
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这是一个快速功能,当给定符号名称时,它将返回适当的特殊文件夹路径。确保在USES语句中包括SHLOBJ.DCU单元,并使用以下命令:
function GetSpecialFolderPath(Folder: Integer; CanCreate: Boolean): string;
// Gets path of special system folders
//
// Call this routine as follows:
// GetSpecialFolderPath (CSIDL_PERSONAL, false)
// returns folder as result
//
var
FilePath: array [0..255] of char;
begin
SHGetSpecialFolderPath(0, @FilePath[0], FOLDER, CanCreate);
Result := FilePath;
end;
================================================== ==============
作为引用,这些常量如下:
CSIDL_DESKTOP = $0000; { <desktop> }
CSIDL_INTERNET = $0001; { Internet Explorer (icon on desktop) }
CSIDL_PROGRAMS = $0002; { Start Menu\Programs }
CSIDL_CONTROLS = $0003; { My Computer\Control Panel }
CSIDL_PRINTERS = $0004; { My Computer\Printers }
CSIDL_PERSONAL = $0005; { My Documents. This is equivalent to CSIDL_MYDOCUMENTS in XP and above }
CSIDL_FAVORITES = $0006; { <user name>\Favorites }
CSIDL_STARTUP = $0007; { Start Menu\Programs\Startup }
CSIDL_RECENT = $0008; { <user name>\Recent }
CSIDL_SENDTO = $0009; { <user name>\SendTo }
CSIDL_BITBUCKET = $000a; { <desktop>\Recycle Bin }
CSIDL_STARTMENU = $000b; { <user name>\Start Menu }
CSIDL_MYDOCUMENTS = $000c; { logical "My Documents" desktop icon }
CSIDL_MYMUSIC = $000d; { "My Music" folder }
CSIDL_MYVIDEO = $000e; { "My Video" folder }
CSIDL_DESKTOPDIRECTORY = $0010; { <user name>\Desktop }
CSIDL_DRIVES = $0011; { My Computer }
CSIDL_NETWORK = $0012; { Network Neighborhood (My Network Places) }
CSIDL_NETHOOD = $0013; { <user name>\nethood }
CSIDL_FONTS = $0014; { windows\fonts }
CSIDL_TEMPLATES = $0015;
CSIDL_COMMON_STARTMENU = $0016; { All Users\Start Menu }
CSIDL_COMMON_PROGRAMS = $0017; { All Users\Start Menu\Programs }
CSIDL_COMMON_STARTUP = $0018; { All Users\Startup }
CSIDL_COMMON_DESKTOPDIRECTORY = $0019; { All Users\Desktop }
CSIDL_APPDATA = $001a; { <user name>\Application Data }
CSIDL_PRINTHOOD = $001b; { <user name>\PrintHood }
CSIDL_LOCAL_APPDATA = $001c; { <user name>\Local Settings\Application Data (non roaming) }
CSIDL_ALTSTARTUP = $001d; { non localized startup }
CSIDL_COMMON_ALTSTARTUP = $001e; { non localized common startup }
CSIDL_COMMON_FAVORITES = $001f;
CSIDL_INTERNET_CACHE = $0020;
CSIDL_COOKIES = $0021;
CSIDL_HISTORY = $0022;
CSIDL_COMMON_APPDATA = $0023; { All Users\Application Data }
CSIDL_WINDOWS = $0024; { GetWindowsDirectory() }
CSIDL_SYSTEM = $0025; { GetSystemDirectory() }
CSIDL_PROGRAM_FILES = $0026; { C:\Program Files }
CSIDL_MYPICTURES = $0027; { C:\Program Files\My Pictures }
CSIDL_PROFILE = $0028; { USERPROFILE }
CSIDL_SYSTEMX86 = $0029; { x86 system directory on RISC }
CSIDL_PROGRAM_FILESX86 = $002a; { x86 C:\Program Files on RISC }
CSIDL_PROGRAM_FILES_COMMON = $002b; { C:\Program Files\Common }
CSIDL_PROGRAM_FILES_COMMONX86 = $002c; { x86 C:\Program Files\Common on RISC }
CSIDL_COMMON_TEMPLATES = $002d; { All Users\Templates }
CSIDL_COMMON_DOCUMENTS = $002e; { All Users\Documents }
CSIDL_COMMON_ADMINTOOLS = $002f; { All Users\Start Menu\Programs\Administrative Tools }
CSIDL_ADMINTOOLS = $0030; { <user name>\Start Menu\Programs\Administrative Tools }
CSIDL_CONNECTIONS = $0031; { Network and Dial-up Connections }
CSIDL_COMMON_MUSIC = $0035; { All Users\My Music }
CSIDL_COMMON_PICTURES = $0036; { All Users\My Pictures }
CSIDL_COMMON_VIDEO = $0037; { All Users\My Video }
CSIDL_RESOURCES = $0038; { Resource Directory }
CSIDL_RESOURCES_LOCALIZED = $0039; { Localized Resource Directory }
CSIDL_COMMON_OEM_LINKS = $003a; { Links to All Users OEM specific apps }
CSIDL_CDBURN_AREA = $003b; { USERPROFILE\Local Settings\Application Data\Microsoft\CD Burning }
CSIDL_COMPUTERSNEARME = $003d; { Computers Near Me (computered from Workgroup membership) }
CSIDL_PROFILES = $003e;