DetailsView怎么更新数据到数据库中

这个编辑后后台代码怎么书写才能把更新后的数据更新到数据库中。还有这个控件中没有触发编辑的事件啊。。。 这个是我的更新事件的代码。求高人帮忙protected void DetailsView1_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
    {
        string Tid = ((TextBox)DetailsView1.FindControl("Tid")).Text.Trim();
        string Tname = ((TextBox)DetailsView1.FindControl("Tname")).Text.Trim();
        string Tsex = ((TextBox)DetailsView1.FindControl("Tsex")).Text.Trim();
        string Tage = ((TextBox)DetailsView1.FindControl("Tage")).Text.Trim();
        string Ttel = ((TextBox)DetailsView1.FindControl("Ttel")).Text.Trim();
        string Tpwd = ((TextBox)DetailsView1.FindControl("Tpwd")).Text.Trim();
        db sdb = new db();
        string qq = "update teacher set Tid='" + Tid + "',Tamme='" + Tname + "',Tsex='" + Tsex + "',Tage='" + Tage + "',Ttel='" + Ttel+ "'where Tpwd='" + Tpwd.ToString() + "'";
        if (sdb.enq(qq) > 0)
        {
            Response.Write("11");
            DetailsView1.ChangeMode(DetailsViewMode.ReadOnly);
        }
        else
        {
            Response.Write("22");
        }

    }