存在 DirectoryExists
var
dir: string;
begin
dir := 'c:\temp';
if not DirectoryExists(dir) then
begin
//如果文件夹不存在
end;
end;
--------------------------------------------------------------------------------
//删除文件 DeleteFile; Windows.DeleteFile
var
f: string;
begin
f := 'c:\temp\test.txt';
//DeleteFile(f); //返回 Boolean
//或者用系统API:
Windows.DeleteFile(PChar(f)); //返回 Boolean
end;
--------------------------------------------------------------------------------
//删除文件夹 RemoveDir; RemoveDirectory
var
dir: string;
begin
dir := 'c:\temp';
RemoveDir(dir); //返回 Boolean
//或者用
系统 API:
RemoveDirectory(PChar(dir)); //返回 Boolean
end;
--------------------------------------------------------------------------------
//获取当前文件夹 GetCurrentDir
var
dir: string;
begin
dir := GetCurrentDir;
ShowMessage(dir); //C:\Projects
end;
--------------------------------------------------------------------------------
//设置当前文件夹 SetCurrentDir; ChDir; SetCurrentDirectory
var
dir: string;
begin
dir := 'c:\temp';
if SetCurrentDir(dir) then
ShowMessage(GetCurrentDir); //c:\temp
//或者
ChDir(dir); //无返回值
//也可以使用API:
SetCurrentDirectory(PChar(Dir)); //返回 Boolean
end;
--------------------------------------------------------------------------------
//获取指定驱动器的当前路径名 GetDir
var
dir: string;
b: Byte;
begin
b := 0;
GetDir(b,dir);
ShowMessage(dir); //
//第一个参数: 1、2、3、4...分别对应: A、B、C、D...
//0 是缺省驱动器
end;
--------------------------------------------------------------------------------
//文件改名 RenameFile
var
OldName,NewName: string;
begin
OldName := 'c:\temp\Old.txt';
NewName := 'c:\temp\New.txt';
if RenameFile(OldName,NewName) then
ShowMessage('改名成功!');
//也可以:
SetCurrentDir('c:\temp');
OldName := 'Old.txt';
NewName :=
'New.txt';
if RenameFile(OldName,NewName) then
ShowMessage('改名成功!');
end;
--------------------------------------------------------------------------------
//建立文件夹 CreateDir; CreateDirectory; ForceDirectories
var
dir: string;
begin
dir := 'c:\temp\delphi';
if not DirectoryExists(dir) then
CreateDir(dir); //返回 Boolean
//也可以直接用API:
CreateDirectory(PChar(dir),nil); //返回 Boolean
//如果缺少上层目录将自动补齐:
dir := 'c:\temp\CodeGear\Delphi\2007\万一';
ForceDirectories(dir); //返回 Boolean
end;
-------------------------------------------------------------------------------
//删除空文件夹 RemoveDir; RemoveDirectory
var
dir: string;
begin
dir := 'c:\temp\delphi';
RemoveDir(dir); //返回 Boolean
//也可以直接用API:
RemoveDirectory(PChar(dir)); //返回 Boolean
end;
--------------------------------------------------------------------------------
//建立新文件 FileCreate
var
FileName: string;
i: Integer;
begin
FileName := 'c:\temp\test.dat';
i := FileCreate(FileName);
if i>0 then
ShowMessage('新文件的句柄是: ' + IntToStr(i))
else
ShowMessage('创建失败!');
end;
--------------------------------------------------------------------------------
//获取当前文件的版本号 GetFileVersion
var
s: string;
i: Integer;
begin
s := 'C:\WINDOWS\notepa