1。public static int i = 0;
2。
protected void OnSortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
i += 1;
BindGrid();
}
3。private void BindGrid()
{
string m_strConn = ConfigurationSettings.AppSettings["connectionString"];
SqlConnection cnn = new SqlConnection(m_strConn);
SqlDataAdapter da;
if (i%2 == 0)
da = new SqlDataAdapter("select * from jcyhqd order by yhm desc",cnn);
else
da = new SqlDataAdapter("select * from jcyhqd order by yhm asc",cnn);