protected void ddlStudent_SelectedIndexChanged(object sender, EventArgs e)
{
// 获得学期信息
if (ddlStudent.SelectedValue != "null")
{
ddlTerm.Items.Clear(); // 先清空已下拉菜单
ddlTerm.Items.Add(new ListItem("==请选择==", "null")); //设置第一行
ddlTerm.DataSource = finSrv.GetStudTuition(ddlStudent.SelectedValue);
ddlTerm.DataBind();
}
else
{
lbMessage.Text = "请选择学生";
}
}