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我剛剛開始使用LINQ到SQL。我希望有人可以驗證linq-2-sql延遲執行，直到執行foreach循環。總而言之，有人能告訴我這個代碼是否可擴展。這是一個帶有幾個搜索參數的簡單獲取方法。謝謝！Linq-2-Sql代碼：這是否規模？
代碼：
public static IList<Content> GetContent(int contentTypeID, int feedID, DateTime? date, string text)
{
List<Content> contentList = new List<Content>();
using (DataContext db = new DataContext())
{
var contentTypes = db.ytv_ContentTypes.Where(p => contentTypeID == -1 || p.ContentTypeID == contentTypeID);
var feeds = db.ytv_Feeds.Where(p => p.FeedID == -1 || p.FeedID == feedID);
var targetFeeds = from f in feeds
join c in contentTypes on f.ContentTypeID equals c.ContentTypeID
select new { FeedID = f.FeedID, ContentType = f.ContentTypeID };
var content = from t in targetFeeds
join c in db.ytv_Contents on t.FeedID equals c.FeedID
select new { Content = c, ContentTypeID = t.ContentType };
if (String.IsNullOrEmpty(text))
{
content = content.Where(p => p.Content.Name.Contains(text) || p.Content.Description.Contains(text));
}
if (date != null)
{
DateTime dateTemp = Convert.ToDateTime(date);
content = content.Where(p => p.Content.StartDate <= dateTemp && p.Content.EndDate >= dateTemp);
}
//Execution has been defered to this point, correct?
foreach (var c in content)
{
Content item = new Content()
{
ContentID = c.Content.ContentID,
Name = c.Content.Name,
Description = c.Content.Description,
StartDate = c.Content.StartDate,
EndDate = c.Content.EndDate,
ContentTypeID = c.ContentTypeID,
FeedID = c.Content.FeedID,
PreviewHtml = c.Content.PreviewHTML,
SerializedCustomXMLProperties = c.Content.CustomProperties
};
contentList.Add(item);
}
}
//TODO
return contentList;
}