protected void PageChanged(object sender, DataGridPageChangedEventArgs e)
{
products.CurrentPageIndex = e.NewPageIndex;
// Get the search terms from the query string
string searchKey = WebComponents.CleanString.InputText(Request["keywords"], 100);
if (searchKey != ""){
// Create a data cache key
string cacheKey = "search" + searchKey;
// Check if the objects are in the cache
if(Cache[cacheKey] != null){
products.DataSource = (IList)Cache[cacheKey];
}else{
// If that data is not in the cache then use the business logic tier to fetch the data
Product product = new Product();
IList productsBySearch = product.GetProductsBySearch(searchKey);
// Store the results in a cache
Cache.Add(cacheKey, productsBySearch, null, DateTime.Now.AddHours(12), Cache.NoSlidingExpiration , CacheItemPriority.High, null);
products.DataSource = productsBySearch;
}
// Databind the data to the controls
products.DataBind();
}
}
/// <summary>
/// Rebind control
/// </summary>
protected void PageChanged(object sender, DataGridPageChangedEventArgs e)
{
//reset index
searchList.CurrentPageIndex = e.NewPageIndex;
//get category id
string keywordKey = Request.QueryString["keywords"];
//bind data
Product product = new Product();
searchList.DataSource = product.GetProductsBySearch(keywordKey);
searchList.DataBind();
}
/// <summary>
/// This method acts as a proxy between the web and business components to check whether the
/// underlying search result has already been cached.
/// </summary>
/// <param name="text">Search Text</param>
/// <returns>List of ProductInfo from Cache or Business component</returns>
public static IList<ProductInfo> GetProductsBySearch(string text)
{
Product product = new Product();
if (!enableCaching)
return product.GetProductsBySearch(text);
string key = "product_search_" + text;
IList<ProductInfo> data = (IList<ProductInfo>)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 = product.GetProductsBySearch(text);
// Create a AggregateCacheDependency object from the factory
AggregateCacheDependency cd = DependencyFacade.GetProductDependency();
// Store the output in the data cache, and Add the necessary AggregateCacheDependency object
HttpRuntime.Cache.Add(key, data, cd, DateTime.Now.AddHours(productTimeout), Cache.NoSlidingExpiration, CacheItemPriority.High, null);
}
return data;
}
