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清空目录以及子目录(delphi7)
procedure delDir(dirName: string);
var
sr: TSearchRec;
dLen: Integer;
str: string;
begin
// write by delphi7
// 功能：删除目录及其子目录
dLen := length(dirName);
if dirName[dLen] <> '\' then dirName := dirName + '\';
if FindFirst(dirName + '*.*', faAnyFile, sr) = 0 then
begin
repeat
if (sr.Name = '.') or (sr.Name = '..') then continue;
str := dirname + sr.Name;
if (sr.Attr and faDirectory) = faDirectory then
begin
delDir(str);
RemoveDirectory(PChar(str));
end
else begin
DeleteFile(str);
end;
until FindNext(sr) <> 0;
FindClose(sr);
end;
RemoveDirectory(PChar(dirName));
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