After adding my new CS2007 theme, I wanted to take advantage of caching for my home page. There was some sample code in the default theme, but it wasn’t exactly what I needed:

protected override void OnInit(EventArgs e)
{
    List recentPosts = CSCache.Get("HomePageSearch-" 
      + CurrentCSContext.User.RoleKey) as List;
    if (recentPosts == null)
    {
        SearchQuery query = new SearchQuery();
        query.StartDate = DateTime.Now.AddDays(-10);
        query.EndDate = DateTime.Now.AddDays(1);
        query.PageSize = 5;

        recentPosts = CSSearch.Search(query).Posts;
        CSCache.Insert("HomePageSearch-" 
     + CurrentCSContext.User.RoleKey, recentPosts, CSCache.MinuteFactor * 5);
    }
    RecentPostList.DataSource = recentPosts;

    base.OnInit(e);
}

This does a query for all additions to the site in the last 10 days, including images, comments, etc. But I wanted just blog entries. Looking around on the web, I found a discussion on this in the CS Forums. Using this as guide, I got exactly what I needed:

protected override void OnInit(EventArgs e)
{
    int NumberOfBlogPosts = 3;
    List recentPosts = CSCache.Get("HomePageBlog-" 
        + CurrentCSContext.User.RoleKey) as List;
    
    if (recentPosts == null)
    {
        List FilteredPosts = new List();    
        SearchQuery query = new SearchQuery();
        query.PageSize = 20;
        query.ApplicationTypes = new ApplicationType[] { ApplicationType.Weblog };
        recentPosts = CSSearch.Search(query).Posts;

        int PostNumber = ;
        foreach (IndexPost post in recentPosts)
            if (PostNumber < NumberOfBlogPosts)
                if (!post.Title.StartsWith("re:", true, null))
                {
                    FilteredPosts.Add(post);
                    PostNumber++;
                }


        CSCache.Insert("HomePageBlog-" 
      + CurrentCSContext.User.RoleKey, FilteredPosts, 300);
        recentPosts = FilteredPosts;
    }
    RecentPostList.DataSource = recentPosts;
    base.OnInit(e);
}

This finds 20 weblog posts, filters out everything that starts with “Re:”, adds it to the cache, and uses it as a datasource for the blogpost list.