protected void lstRoles_SelectedIndexChanged(object sender, EventArgs e)
{
//string userid=Request.Params.Get("id");
string userid = Session["id"] != null ? Session["id"].ToString() : "";
MainSecurity objscu = new MainSecurity();
//lay thong tin ve chuyen muc cua thang hien tai
lstCat.DataTextField = "Cat_Name";
lstCat.DataValueField = "Cat_ID";
lstCat.DataSource = objscu.GetCategoryByRoleAsTable(userid, Int32.Parse(lstRoles.SelectedValue));
lstCat.DataBind();
//lay thong tin ve toan bo quyen
lstPer.DataSource = objscu.GetPermissionAsTable(userid, 1, -1);
lstPer.DataTextField = "Permission_Name";
lstPer.DataValueField = "Permission_ID";
lstPer.DataBind();
}