如何从asp:按钮调用datagrid分类?

I have a datagrid which reads all songs from a directory and generate rows. I wrote and the datagrid sortification which sort by song name on ASC or DESC the only way to call sortification is to press the link in the header. But I whant to call sortification command from a asp:button, how can I do?I have a datagrid which reads all songs from a