Example of how I converted Advanced Database Crawler functionality to Sitecore 7.

SitecoreADCMigration.cs

/* Sitecore 6.x code */
var searchParam = new SearchParam
{
    Database = currentDB,
    Language = "",
    TemplateIds = "",
    LocationIds = blog.ID.Guid.ToString(),
    FullTextQuery = terms
};

using (var runner = new QueryRunner("advanced"))
{
    var skinnies = runner.GetItems(searchParam);
    foreach (var i in skinnies)
    {
        var tempItemp = blog.Database.GetItem(i.ItemID);
        if (tempItemp.TemplateName == "BlogEntry")
        {
            result.Add(tempItemp);
        }
    }
}

/* Sitecore 7.x code */
using (var context = ContentSearchManager.GetIndex("sitecore_web_index").CreateSearchContext())
{
	var termSearch = PredicateBuilder.True<SearchResultItem>();
	foreach (var term in terms.Split(' '))
	{
		var newTerm = term;
		termSearch = termSearch.And(t => t.Content.Contains(newTerm));
	}

	var query = context
		.GetQueryable<SearchResultItem>()
		.Where(i =>
			i.TemplateName == "BlogEntry"
			&& i.Path.StartsWith(blog.Paths.Path)
		)
		.Where(termSearch);
	
	foreach (var item in query)
	{
		var contentItem = blog.Database.GetItem(item.ItemId);
		result.Add(contentItem);
	}
}

James,

Have you got any more code that will give it more context? ie. what is the type for blog?
Also, a readme file would be great.

Also, what is terms, it is not defined.

thanks
Russ