// 当下拉专业改变时,添加班级信息
protected void DdlSpeciality_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddlDepartment.SelectedValue != "null" && ddlSpeciality.SelectedValue != "null")
{
// 获得班级
ddlClass.Items.Clear(); // 先清空已下拉菜单
ddlClass.Items.Add(new ListItem("==请选择==", "null")); //设置第一行
ddlClass.DataSource = finSrv.GetClass(ddlSpeciality.SelectedValue);
ddlClass.DataBind();
}
else
{
lbMessage.Text = "请选择学院和专业";
}
}