savepicturedialog在保存时，怎么获得后缀呢？

Question

savepicturedialog在保存时，怎么获得后缀呢？
在SavePictureDialog1SelectionChange事件里
例如保存时 选了bmp 就提示您选择了bmp！
           选了jpg 就提示您选择了bmp！
把后缀赋给str,
case   str   of 
                0:str:='.ico';  
                             begin
                              ShowMessage('您选择的是ico');  
                             end;
                1:str:='Jpeg; 
                             begin
                              ShowMessage('您选择的是ico');  
                             end;
     
                
如何获得后缀呢？

Answer 1

ExtractFileExt(savepicturedialog.FileName)