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cellspacing="1" cellpadding="1" bgcolor="#000000"><tr bgcolor="#FFFFFF"><td width="100%" colspan="4" align="left"><table width="95%" align="center"><tr><td class="font1"><p align="center"><br><font size="3">Delphi中对目录拷贝、删除和搬移的操作</font><br><span class="nava"><font color="#CC9933">2000-09-02· 吴成宾·青竹软件</font></span></p><p> 笔者在工作中遇到了需要对目录进行拷贝、删除和搬移的需求，Delphi本身提供了一些目录操作函数，但只是针对空目录而言，对目录下带有子目录的情况，更是无能为力。利用Win32 API函数和结构，以及递归的程序设计思想，笔者实现了对任意目录进行拷贝、删除和搬移的功能(分别相当于DOS中的XCopy、DelTree和Move命令)。以下分别给出了实现代码： </p><p> 1、拷贝目录 </p><p> 为了能拷贝目录下带有子目录的情况，先定义一个辅助的拷贝函数，它是递归执行的，直到把目录下的所有文件和子目录都拷贝完。 </p><p> 1.1拷贝目录的递归辅助函数：DoCopyDir </p><blockquote><p>function DoCopyDir(sDirName:String;<br> sToDirName:String):Boolean;<br> var<br> hFindFile:Cardinal;<br> t,tfile:String;<br> sCurDir:String[255];<br> FindFileData:WIN32_FIND_DATA;<br> begin<br> //先保存当前目录<br> sCurDir:=GetCurrentDir;<br> ChDir(sDirName);<br> hFindFile:=FindFirstFile('*.*',FindFileData);<br> if hFindFile< >INVALID_HANDLE_VALUE then<br> begin<br> if not DirectoryExists(sToDirName) then<br> ForceDirectories(sToDirName);<br> repeat<br> tfile:=FindFileData.cFileName;<br> if (tfile='.') or (tfile='..') then<br> Continue;<br> if FindFileData.dwFileAttributes=<br> FILE_ATTRIBUTE_DIRECTORY then<br> begin<br> t:=sToDirName+'\'+tfile;<br> if not DirectoryExists(t) then<br> ForceDirectories(t);<br> if sDirName[Length(sDirName)]< >'\' then<br> DoCopyDir(sDirName+'\'+tfile,t)<br> else<br> DoCopyDir(sDirName+tfile,sToDirName+tfile);<br> end<br> else<br> begin<br> t:=sToDirName+'\'+tFile;<br> CopyFile(PChar(tfile),PChar(t),True);<br> end;<br> until FindNextFile(hFindFile,FindFileData)=false;<br> FindClose(hFindFile);<br> end<br> else<br> begin<br> ChDir(sCurDir);<br> result:=false;<br> exit;<br> end;<br> //回到原来的目录下<br> ChDir(sCurDir);<br> result:=true;<br> end;<br> 1.2拷贝目录的函数：CopyDir </p><p>function CopyDir(sDirName:String;<br> sToDirName:string):Boolean;<br> begin<br> if Length(sDirName)< =0 then<br> exit;<br> //拷贝...<br> Result:=DoCopyDir(sDirName,sToDirName);<br> end;<br> 2、删除目录 </p></blockquote><p> 删除目录与拷贝目录很类似，但为了能删除位于根目录下的一个空目录，需要在辅助函数中设置一个标志变量，即：如果删除的是空目录,则置bEmptyDir为True，这一句已经用深色框表示了。 </p><p> 2.1删除目录的递归辅助函数：DoRemoveDir </p><blockquote><p>function DoRemoveDir(sDirName:String):Boolean;<br> var<br> hFindFile:Cardinal;<br> tfile:String;<br> sCurDir:String;<br> bEmptyDir:Boolean;<br> FindFileData:WIN32_FIND_DATA;<br> begin<br> //如果删除的是空目录,则置bEmptyDir为True<br> //初始时,bEmptyDir为True<br> bEmptyDir:=True;<br> //先保存当前目录<br> sCurDir:=GetCurrentDir;<br>⌨️ 快捷键说明
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