//查询角色
public ActionResult Role_query(string rolename)
{
List <Role> roles = dbDrive.QueryRoles(rolename);
//code--信息状态，默认为0，msg--返回信息，count--数据条数，data--数据
return(Json(new { code = 0, msg = "", count = roles.Count, data = roles }, JsonRequestBehavior.AllowGet));
}