protected void BtnSpecSta_Click(object sender, EventArgs e) { // 获得专业统计情况 if (ddlSpeciality.SelectedValue != "null") { // 调用逻辑查询统计情况 gv.DataSource = finSrv.GetSpecilityStatistics(ddlSpeciality.SelectedItem.Text); gv.DataBind(); lbMessage.Text = ""; } else { lbMessage.Text = "请选择专业"; } }