http://hi.baidu.com/%B1%F9%D1%A9%D2%F8%C1%AB/blog/item/39a1c4fb0ae8ebccb58f31e0.html#0
通常当用到大的Json文档的时候，你可能只对其中的一小个片段信息感兴趣。这种情况下你想把Json.Net转换为.Net 对象就会让人很困扰，因为你必须为Json的整个结果定义一个.Net的类。
使用Json.Net很容易避开这个问题。在把它们传递到Json.Net序列化器之前，你可以使用Linq to Json 提取Json中你想要序列化的一些片段。
string googleSearchText = @"{
""responseData"": {
""results"": [
{
""GsearchResultClass"": ""GwebSearch"",
""unescapedUrl"": ""http://en.wikipedia.org/wiki/Paris_Hilton"",
""url"": ""http://en.wikipedia.org/wiki/Paris_Hilton"",
""visibleUrl"": ""en.wikipedia.org"",
""cacheUrl"": ""http://www.google.com/search?q=cache:TwrPfhd22hYJ:en.wikipedia.org"",
""title"": ""<b>Paris Hilton</b> - Wikipedia, the free encyclopedia"",
""titleNoFormatting"": ""Paris Hilton - Wikipedia, the free encyclopedia"",
""content"": ""[1] In 2006, she released her debut album...""
},
{
""GsearchResultClass"": ""GwebSearch"",
""unescapedUrl"": ""http://www.imdb.com/name/nm0385296/"",
""url"": ""http://www.imdb.com/name/nm0385296/"",
""visibleUrl"": ""www.imdb.com"",
""cacheUrl"": ""http://www.google.com/search?q=cache:1i34KkqnsooJ:www.imdb.com"",
""title"": ""<b>Paris Hilton</b>"",
""titleNoFormatting"": ""Paris Hilton"",
""content"": ""Self: Zoolander. Socialite <b>Paris Hilton</b>...""
}
],
""cursor"": {
""pages"": [
{
""start"": ""0"",
""label"": 1
},
{
""start"": ""4"",
""label"": 2
},
{
""start"": ""8"",
""label"": 3
},
{
""start"": ""12"",
""label"": 4
}
],
""estimatedResultCount"": ""59600000"",
""currentPageIndex"": 0,
""moreResultsUrl"": ""http://www.google.com/search?oe=utf8&ie=utf8...""
}
},
""responseDetails"": null,
""responseStatus"": 200
}";
JObject googleSearch = JObject.Parse(googleSearchText);
// get JSON result objects into a list
IList<JToken> results = googleSearch["responseData"]["results"].Children().ToList();
// serialize JSON results into .NET objects
IList<SearchResult> searchResults = new List<SearchResult>();
foreach (JToken result in results)
{
SearchResult searchResult = JsonConvert.DeserializeObject<SearchResult>(result.ToString());
searchResults.Add(searchResult);
}
// Title = <b>Paris Hilton</b> - Wikipedia, the free encyclopedia
// Content = [1] In 2006, she released her debut album...
// Url = http://en.wikipedia.org/wiki/Paris_Hilton
// Title = <b>Paris Hilton</b>
// Content = Self: Zoolander. Socialite <b>Paris Hilton</b>...
// Url = http://www.imdb.com/name/nm0385296/