protected void ButtonClear_Click(object sender, EventArgs e)
{
int oldyear = Int32.Parse(DDLyear.SelectedValue);
LearnSite.BLL.Works wbll = new LearnSite.BLL.Works();
int wct = wbll.DeleteOldyear(oldyear);//清理作品记录
LearnSite.BLL.Signin sbll = new LearnSite.BLL.Signin();
int sct = sbll.DeleteOldyear(oldyear);//清理签到记录
LearnSite.BLL.Result rbll = new LearnSite.BLL.Result();
int rct = rbll.DeleteOldyear(oldyear);//清理测验记录
Labelmsg.Text = "执行结果：清理作品记录" + wct.ToString() + "条、清理签到记录" + sct.ToString() + "条、清理测验记录" + rct.ToString() + "条";
}
