如何使用 C# 和 Json.NET 解析 Google 的 JSON API 搜索结果

我正在用 C# 做一个项目，我想在其中输入一个搜索词，点击搜索按钮，然后将部分响应从 Google 检索到数组，以便我可以迭代它们。

使用基于JSON的API搜索Google非常简单

var client = new HttpClient();
var address = new Uri("https://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=" + term);
HttpResponseMessage response = await client.GetAsync(address);
String stream = await response.Content.ReadAsStringAsync();

这将返回如下所示的 JSON 字符串（术语"测试搜索"的结果）

{
    "responseData":{
        "results":[
            {
                "GsearchResultClass":"GwebSearch",
                "unescapedUrl":"http://en.wikipedia.org/wiki/Wikipedia:Search_engine_test",
                "url":"http://en.wikipedia.org/wiki/Wikipedia:Search_engine_test",
                "visibleUrl":"en.wikipedia.org",
                "cacheUrl":"http://www.google.com/search?q'u003dcache:g6KEStELS_MJ:en.wikipedia.org",
                "title":"Wikipedia:'u003cb'u003eSearch'u003c/b'u003eengine'u003cb'u003etest'u003c/b'u003e-Wikipedia,thefreeencyclopedia",
                "titleNoFormatting":"Wikipedia:Searchenginetest-Wikipedia,thefreeencyclopedia",
                "content":"A'u003cb'u003esearch'u003c/b'u003eengine'u003cb'u003etest'u003c/b'u003ecannothelpyouavoidtheworkofinterpretingyourresultsanddecidingwhattheyreallyshow.Appearanceinanindexaloneisnotusually'u003cb'u003e...'u003c/b'u003e"
             },
             {
                 "GsearchResultClass":"GwebSearch",
                 "unescapedUrl":"http://techcrunch.com/2008/07/16/google-continues-to-test-a-search-interface-that-looks-more-like-digg-every-day/",
                 "url":"http://techcrunch.com/2008/07/16/google-continues-to-test-a-search-interface-that-looks-more-like-digg-every-day/",
                 "visibleUrl":"techcrunch.com",
                 "cacheUrl":"http://www.google.com/search?q'u003dcache:r2laSUVQw8kJ:techcrunch.com",
                 "title":"GoogleContinuesTo'u003cb'u003eTest'u003c/b'u003eA'u003cb'u003eSearch'u003c/b'u003eInterfaceThatLooksMoreLike'u003cb'u003e...'u003c/b'u003e",
                 "titleNoFormatting":"GoogleContinuesToTestASearchInterfaceThatLooksMoreLike...",
                 "content":"Jul16,2008'u003cb'u003e...'u003c/b'u003eAcoupleofdaysagowepostedscreenshotsofanew'u003cb'u003esearch'u003c/b'u003einterfacebeingbucket'u003cb'u003etested'u003c/b'u003ebyGooglethatletsusersvoteupordownon'u003cb'u003e...'u003c/b'u003e"
             },
             {
                "GsearchResultClass":"GwebSearch",
                "unescapedUrl":"http://googleblog.blogspot.com/2006/04/this-is-test-this-is-only-test.html",
                "url":"http://googleblog.blogspot.com/2006/04/this-is-test-this-is-only-test.html",
                "visibleUrl":"googleblog.blogspot.com",
                "cacheUrl":"http://www.google.com/search?q'u003dcache:Ozl1cQzRT0IJ:googleblog.blogspot.com",
                "title":"Thisisa'u003cb'u003etest'u003c/b'u003e.Thisisonlya'u003cb'u003etest'u003c/b'u003e.|OfficialGoogleBlog",
                "titleNoFormatting":"Thisisatest.Thisisonlyatest.|OfficialGoogleBlog",
                "content":"Apr24,2006'u003cb'u003e...'u003c/b'u003eFromtimetotime,werunliveexperimentsonGoogle—'u003cb'u003etests'u003c/b'u003evisibletoarelativelyfewpeople--todiscoverbetterwaysto'u003cb'u003esearch'u003c/b'u003e.Wedothis'u003cb'u003e...'u003c/b'u003e"
             },
             {
                "GsearchResultClass":"GwebSearch",
                "unescapedUrl":"http://alistapart.com/article/testing-search-for-relevancy-and-precision",
                "url":"http://alistapart.com/article/testing-search-for-relevancy-and-precision",
                "visibleUrl":"alistapart.com",
                "cacheUrl":"http://www.google.com/search?q'u003dcache:02Sjrd5mb0YJ:alistapart.com",
                "title":"'u003cb'u003eTestingSearch'u003c/b'u003eforRelevancyandPrecision·AnAListApartArticle",
                "titleNoFormatting":"TestingSearchforRelevancyandPrecision·AnAListApartArticle",
                "content":"Sep22,2009'u003cb'u003e...'u003c/b'u003eDespitethefactthatsite'u003cb'u003esearch'u003c/b'u003eoftenreceivesthemosttraffic,it'u0026#39;salsotheplacewheretheuserexperiencedesignerbearstheleastinfluence."
             }
          ],
          "cursor":{
             "resultCount":"1,010,000,000",
             "pages":[
                {
                   "start":"0",
                   "label":1
                },
                {
                   "start":"4",
                   "label":2
                },
                {
                   "start":"8",
                   "label":3
                },
                {
                   "start":"12",
                   "label":4
                },
                {
                   "start":"16",
                   "label":5
                },
                {
                   "start":"20",
                   "label":6
                },
                {
                   "start":"24",
                   "label":7
                },
                {
                   "start":"28",
                   "label":8
                }
             ],
             "estimatedResultCount":"1010000000",
             "currentPageIndex":0,
             "moreResultsUrl":"http://www.google.com/search?oe'u003dutf8'u0026ie'u003dutf8'u0026source'u003duds'u0026start'u003d0'u0026hl'u003den'u0026q'u003dTest+search",
             "searchResultTime":"0.23"
          }
       },
       "responseDetails":null,
       "responseStatus":200
    }

如何获取推送到数组中的每个节点中的 url 值，以便我可以遍历它？

dynamic jObj = JsonConvert.DeserializeObject(json);
foreach (var res in jObj.responseData.results)
{
    Console.WriteLine("{0} => {1}'n",res.title,res.url);
}

var jObj = (JObject)JsonConvert.DeserializeObject(json);
string[] urls = jObj["responseData"]["results"]
                .Select(x => (string)x["url"])
                .ToArray();