private void IBSoftwareUpgrade_Click(object sender, System.Web.UI.ImageClickEventArgs e)
        {
            string sql="select * from softwareupgrade where sid='"+this.txtsid.Text+"'";
            SqlConnection conn=new SqlConnection("uid=sa;pwd=sa;database=softwaremanage;server=.");
            conn.Open();
            SqlCommand cmd=new SqlCommand(sql,conn);
            SqlDataReader reader=cmd.ExecuteReader();
            if(reader.Read())
            {
                Response.Redirect("softwareupgradesearch.aspx");
            }
            else
            {
                Response.Write("<script language=javascript >confirm('此软件没有升级记录,是否添加?');</script>");
                //this.IBSoftwareUpgrade.Attributes.Add("onclick","javascript:return confirm ('此软件没有升级记录，是否添加?')");
                Response.Redirect("softwareupgrade.aspx");
            }
            reader.Close();
            conn.Close();
        }

window.location.href='softwareupgrade.aspx'