F:\新建文件夹\abc.txt
文件名,如abc.txt
Edit1.Text:=ExtractFileName(Opendialog1.FileName);
路径名,如F:\新建文件夹\,以“\”结尾
Edit2.Text:=ExtractFilePath(Opendialog1.FileName);
ExtractFilePath(Opendialog1.FileName)+ExtractFileName(Opendialog1.FileName)=Opendialog1.FileName
Extract意为提取