Delphi Batch Change file name

Procedure Tformswitchfilename.btn_changeclick (Sender:tobject); Replace file name
Var
dir:string;
Filenamelist:tstringlist;
Renamefile:file;
filename:string;
I:integer;
Begin
Dir: = Trim (cxtxt_filename. Text);

Filenamelist: = tstringlist.create;
Enumfileinqueue (PChar (dir), '. * ', filenamelist);
Enumfileinqueue (PChar (dir), '. * ', filenamelist);
For I: = 0 to Filenamelist.count-1 do
Begin
FileName: = StringReplace (Trim (filenamelist.strings[i)), Trim (cxtxt1. Text), Trim (cxtxt2. Text), [Rfreplaceall, Rfignorecase]);
AssignFile (RenameFile, Trim (Filenamelist.strings[i]));//Connect the C:\MyFile.txt file with the F variable, and you can use the F variable to manipulate the file later.
Rename (renamefile, filename);//Change file name
End

Filenamelist.free;
End

Procedure Tformswitchfilename.btn_exitclick (Sender:tobject);
Begin
Close; Exit
End

Procedure Tformswitchfilename.btn_searchclick (Sender:tobject); Search for file names under this folder
Var
dir:string;
Filenamelist:tstringlist;
I:integer;
Begin
Dir: = Trim (cxtxt_filename. Text);
Filenamelist: = tstringlist.create;
Enumfileinqueue (PChar (dir), '. * ', filenamelist);
For I: = 0 to Filenamelist.count-1 do
Begin
Cxm_filename. Lines.add (Filenamelist.strings[i]);
End
Filenamelist.free;
End

Procedure Tformswitchfilename.enumfileinqueue (Path:pchar; fileext:string; filelist:tstringlist);
Var
Searchrec:tsearchrec;
Found:integer;
tmpstr:string;
curdir:string;
Dirs:tqueue;
Pszdir:pchar;
Begin
Dirs: = tqueue.create; Create a directory queue
Dirs. Push (path); Queue the start search path
Pszdir: = dirs. Pop;
CurDir: = Strpas (Pszdir); Out Team
{Start traversal until the queue is empty (that is, there is no directory to traverse)}
while (True) does
Begin
Plus search suffix, get a search path like ' c:\*.* ', ' c:\windows\*.* '
TMPSTR: = CurDir + ' \*.* ';
Find the first file, subdirectory in the current directory
Found: = FindFirst (Tmpstr, Faanyfile, Searchrec);
While found = 0 do//after finding a file or directory
Begin
If a directory is found
if (searchrec.attr and Fadirectory) <> 0 Then
Begin
{'. ' will appear when searching subdirectories under a non-root directory (c: \, D:\) '. ' The "virtual directory"
Probably represents the upper and lower directories ... To filter out to be able}
if (Searchrec.name <> ') and (Searchrec.name <> ' ... ') then
Begin
{The path to the top-level directory is added because there is only a directory name for the subdirectory found
Searchrec.name = ' Windows ';
tmpstr:= ' c:\Windows ';
Add a breakpoint and you'll be clear.
}
TMPSTR: = CurDir + ' \ ' + searchrec.name;
{Queue The directory you are searching for.} Let it hang on first.
Because the data inside the tqueue can only be pointers, the string is converted to Pchar
Also use the Strnew function to re-request a space to deposit data, otherwise you will have entered
The pointer into the queue points to nonexistent or incorrect data (TMPSTR is a local variable). }
Dirs. Push (Strnew (PChar (TMPSTR)));
End
End
else//If a file is found
Begin
{Result records the number of files searched.} But I was using CreateThread to create threads
To call the function, do not know how to get this return value ... I don't want to use global variables}
Add the found file to the memo control
If Fileext = '. * ' Then
Filelist.add (CurDir + ' \ ' + searchrec.name)
Else
Begin
If Sametext (rightstr (curDir + ' \ ' + searchrec.name, Length (Fileext)), Fileext) Then
Filelist.add (CurDir + ' \ ' + searchrec.name);
End
End
Find the next file or directory
Found: = FindNext (SEARCHREC);
End
{After the current directory is found, if there is no data in the queue, all are found;
Otherwise there are subdirectories not found, take one out to continue to find. }
If dirs. Count > 0 Then
Begin
Pszdir: = dirs. Pop;
CurDir: = Strpas (Pszdir);
Strdispose (Pszdir);
End
Else
Break
End
Freeing resources
Dirs. Free;
FindClose (SEARCHREC);
End

Delphi Batch Change file name