因此,我正在构建一个 Web 应用程序,一旦完成,我就想出售它。它允许用户在管理面板中输入数据,例如他们的网站名称、元关键字、他们的联系电子邮件、电话、地址等。我编写了一个操作过滤器,以便在我放置过滤器的每个请求中包含这些值,因此我不必每次都查询它们,因为这些值包含在整个站点的公共页脚中。但是,我了解到,如果我用这些值的新信息或不同信息更新数据库,它不会在网页上更新,我猜这是因为操作过滤器是在应用程序启动时配置的。在操作过滤器中,我使用存储库模式来查询这些值。我在下面包含了操作过滤器的代码。我怎样才能拥有操作过滤器的便利,但能够在数据库中的数据发生变化时动态更新它?谢谢!
public class ViewBagActionFilter : ActionFilterAttribute,IActionFilter
{
Repositories.SettingsRepository _repo = new Repositories.SettingsRepository();
void IActionFilter.OnActionExecuted(ActionExecutedContext filterContext)
{
base.OnActionExecuted(filterContext);
}
void IActionFilter.OnActionExecuting(ActionExecutingContext filterContext)
{
string siteName = _repo.GetSiteName();
string siteDesc = _repo.GetSiteDescription();
string siteKeywords = _repo.GetSiteKeywords();
string googleAnalytics = _repo.GetGoogleAnalytics();
string streetAddress = _repo.GetStreetAddress();
string zipCode = _repo.GetZipCode();
string city = _repo.GetCity();
string state = _repo.GetState();
string aboutUs = _repo.GetAboutUs();
string phone = _repo.GetPhoneNumber();
string contactEmail = _repo.GetContactEmail();
if (!string.IsNullOrWhiteSpace(siteName) && siteName.Length > 0)
{
string[] splitSiteName = new string[siteName.Length/2];
splitSiteName = siteName.Split(' ');
if (splitSiteName.Length > 1)
{
filterContext.Controller.ViewBag.SiteName1 = splitSiteName[0];
filterContext.Controller.ViewBag.SiteName2 = splitSiteName[1];
}
else
{
filterContext.Controller.ViewBag.SiteName1 = splitSiteName[0];
filterContext.Controller.ViewBag.SiteName2 = "";
}
}
//Set default values for common viewbag items that are on every page using ternary syntax
filterContext.Controller.ViewBag.SiteDescription = (!string.IsNullOrWhiteSpace(siteDesc) && siteDesc.Length > 0) ? siteDesc : "";
filterContext.Controller.ViewBag.SiteKeywords = (!string.IsNullOrWhiteSpace(siteKeywords) && siteKeywords.Length > 0) ? siteKeywords : "";
filterContext.Controller.ViewBag.GoogleAnalytics = (!string.IsNullOrWhiteSpace(googleAnalytics) && googleAnalytics.Length > 0) ? googleAnalytics : "";
filterContext.Controller.ViewBag.StreetAddress = (!string.IsNullOrWhiteSpace(streetAddress) && streetAddress.Length > 0) ? streetAddress : "";
filterContext.Controller.ViewBag.ZipCode = (!string.IsNullOrWhiteSpace(zipCode) && zipCode.Length > 0) ? zipCode : "";
filterContext.Controller.ViewBag.City = (!string.IsNullOrWhiteSpace(city) && city.Length > 0) ? city : "";
filterContext.Controller.ViewBag.State = (!string.IsNullOrWhiteSpace(state) && state.Length > 0) ? state : "";
filterContext.Controller.ViewBag.AboutUs = (!string.IsNullOrWhiteSpace(aboutUs) && aboutUs.Length > 0) ? aboutUs : "";
filterContext.Controller.ViewBag.PhoneNumber = (!string.IsNullOrWhiteSpace(phone) && phone.Length > 0) ? phone : "";
filterContext.Controller.ViewBag.ContactEmail = (!string.IsNullOrWhiteSpace(contactEmail) && contactEmail.Length > 0) ? contactEmail : "";
base.OnActionExecuting(filterContext);
}
}