我下面的函数获取Facebook数据并将其作为字符串返回。将Json反序列化为在Asp.net中实现Ienumerable的类
public static string GetUserNewsFeed(string strAccessToken)
{
Dictionary<string, object> PostDetail = new Dictionary<string, object>();
DateTime CreatedDateTime = DateTime.Today.AddDays(-90);
var epoch = (CreatedDateTime.ToUniversalTime().Ticks - 621355968000000000)/10000000;
PostDetail.Add("Posts", "SELECT post_id,source_id FROM stream WHERE filter_key in (SELECT filter_key FROM stream_filter WHERE uid=me() AND type='newsfeed') and (likes.count > 0 or comments.count > 0) and created_time > " + epoch);
PostDetail.Add("PostComments", "select post_id,fromid from comment where post_id in (select post_id from #Posts)");
PostDetail.Add("PostLikes", "SELECT object_id,post_id,user_id FROM like WHERE post_id in (select post_id from #Posts)");
string Json = HttpUtility.UrlEncode(Newtonsoft.Json.JsonConvert.SerializeObject(PostDetail));
return RunFQLQuery(Json, strAccessToken);
}
下面是调用该函数,并将其转换使用到Jobject Json.NET代码:
strFeed = FacebookAPI.GetUserNewsFeed(Convert.ToString(Session["access_token"]));
JObject objStreamData = JObject.Parse(strFeed);
var PostResponse = objStreamData.SelectToken("data[0]");
下面这行反序列化NewsFeedPost类:
var Posts = JsonConvert.DeserializeObject<NewsFeedPost>(PostResponse.ToString());
及以下是等级:
public class NewsFeedPost
{
public string name { get; set; }
public List<Post> fql_result_set { get; set; }
}
public class Post
{
public string post_id { get; set; }
public string source_id { get; set; }
}
现在的问题是,当我改变我的NewsFeedPost类低于它抛出错误“无法反序列化JSON对象转换型‘BAL.NewsFeedPost’”:
public class NewsFeedPost : IEnumerable<Post>
{
public string name { get; set; }
public List<Post> fql_result_set { get; set; }
public IEnumerator<Post> GetEnumerator()
{
foreach (Post item in fql_result_set)
{
yield return item;
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
}
下面是JSON响应的示例:
{
"data": [
{
"name": "Posts",
"fql_result_set": [
{
"post_id": "1"
},
{
"post_id": "2"
}
]
},
{
"name": "PostComments",
"fql_result_set": [
{
"post_id": "3",
"fromid": 4
},
{
"post_id": "5",
"fromid": 6
}
]
},
{
"name": "PostLikes",
"fql_result_set": [
{
"object_id": 7,
"post_id": "8",
"user_id": 9
},
{
"object_id": 10,
"post_id": "11",
"user_id": 12
}
]
}
]
}
我只想通过列表枚举并创建逗号分隔列表并将其保存到数据库。任何人都可以提出一些需要解决的问题吗?我如何获得List的Count和Length属性?
铸造你可以发布您试图反序列化JSON的例子吗? – 2012-02-09 14:01:53