/// <summary>
/// Method to retrieve and cache category name by its ID
/// </summary>
/// <param name="categoryId">Category id</param>
/// <returns>Category name</returns>
public static string GetCategoryName(string categoryId)
{
Category category = new Category();
if (!enableCaching)
{
return(category.GetCategory(categoryId).Name);
}
string cacheKey = string.Format(CATEGORY_NAME_KEY, categoryId);
// Check if the data exists in the data cache
string data = (string)HttpRuntime.Cache[cacheKey];
if (data == null)
{
// Caching duration from Web.config
int cacheDuration = int.Parse(ConfigurationManager.AppSettings["CategoryCacheDuration"]);
// If the data is not in the cache then fetch the data from the business logic tier
data = category.GetCategory(categoryId).Name;
// Create a AggregateCacheDependency object from the factory
AggregateCacheDependency cd = DependencyFacade.GetCategoryDependency();
// Store the output in the data cache, and Add the necessary AggregateCacheDependency object
HttpRuntime.Cache.Add(cacheKey, data, cd, DateTime.Now.AddHours(cacheDuration), Cache.NoSlidingExpiration, CacheItemPriority.High, null);
}
return(data);
}
/// <summary>
/// This method acts as a proxy between the web and business components to check whether the
/// underlying category has already been cached.
/// </summary>
/// <param name="categoryId">Category Id</param>
/// <returns>CategoryInfo from Cache or Business component</returns>
public static CategoryInfo GetCategory(string categoryId)
{
Category category = new Category();
if (!enableCaching)
{
return(category.GetCategory(categoryId));
}
string key = "category_" + categoryId;
CategoryInfo data = (CategoryInfo)HttpRuntime.Cache[key];
// Check if the data exists in the data cache
if (data == null)
{
// If the data is not in the cache then fetch the data from the business logic tier
data = category.GetCategory(categoryId);
// Create a AggregateCacheDependency object from the factory
AggregateCacheDependency cd = DependencyFacade.GetCategoryDependency();
// Store the output in the data cache, and Add the necessary AggregateCacheDependency object
HttpRuntime.Cache.Add(key, data, cd, DateTime.Now.AddHours(categoryTimeout), Cache.NoSlidingExpiration, CacheItemPriority.High, null);
}
return(data);
}
protected void Page_Load(object sender, EventArgs e)
{
GetControlStyle();
BindCategories();
// Select current category
string categoryId = Request.QueryString["categoryId"];
if (!string.IsNullOrEmpty(categoryId))
{
SelectCategory(categoryId);
}
// Add cache dependency
this.CachePolicy.Dependency = DependencyFacade.GetCategoryDependency();
}
