无法从System.Int64转换或转换为System.Collections.Generic.List
无法从System.Int64转换或转换为System.Collections.Generic.List
提问于 2013-07-05 20:05:45
当我试图从Twitter API反序列化JSON响应时，我得到了以下异常。它有时会经历，但有时会有问题。
下面是几个类：
public static List<Tweet> Newtwt = new List<Tweet>();
public class Url2
{
public string url { get; set; }
public string expanded_url { get; set; }
public string display_url { get; set; }
public List<int> indices { get; set; }
}
public class Url
{
public List<Url2> urls { get; set; }
}
public class Description
{
public List<object> urls { get; set; }
}
public class Entities
{
public Url url { get; set; }
public Description description { get; set; }
}
public class User
{
public int id { get; set; }
public string id_str { get; set; }
public string name { get; set; }
public string screen_name { get; set; }
public string location { get; set; }
public string description { get; set; }
public string url { get; set; }
public Entities entities { get; set; }
public bool @protected { get; set; }
public int followers_count { get; set; }
public int friends_count { get; set; }
public int listed_count { get; set; }
public string created_at { get; set; }
public int favourites_count { get; set; }
public int utc_offset { get; set; }
public string time_zone { get; set; }
public bool geo_enabled { get; set; }
public bool verified { get; set; }
public int statuses_count { get; set; }
public string lang { get; set; }
public bool contributors_enabled { get; set; }
public bool is_translator { get; set; }
public string profile_background_color { get; set; }
public string profile_background_image_url { get; set; }
public string profile_background_image_url_https { get; set; }
public bool profile_background_tile { get; set; }
public string profile_image_url { get; set; }
public string profile_image_url_https { get; set; }
public string profile_link_color { get; set; }
public string profile_sidebar_border_color { get; set; }
public string profile_sidebar_fill_color { get; set; }
public string profile_text_color { get; set; }
public bool profile_use_background_image { get; set; }
public bool default_profile { get; set; }
public bool default_profile_image { get; set; }
public object following { get; set; }
public bool follow_request_sent { get; set; }
public object notifications { get; set; }
}
public class Entities2
{
public List<object> hashtags { get; set; }
public List<object> symbols { get; set; }
public List<object> urls { get; set; }
public List<object> user_mentions { get; set; }
}
public class RootObject
{
public string created_at { get; set; }
public object id { get; set; }
public string id_str { get; set; }
public string text { get; set; }
public string source { get; set; }
public bool truncated { get; set; }
public object in_reply_to_status_id { get; set; }
public object in_reply_to_status_id_str { get; set; }
public object in_reply_to_user_id { get; set; }
public object in_reply_to_user_id_str { get; set; }
public object in_reply_to_screen_name { get; set; }
public User user { get; set; }
public object geo { get; set; }
public object coordinates { get; set; }
public object place { get; set; }
public object contributors { get; set; }
public int retweet_count { get; set; }
public int favorite_count { get; set; }
public Entities2 entities { get; set; }
public bool favorited { get; set; }
public bool retweeted { get; set; }
public string lang { get; set; }
public bool? possibly_sensitive { get; set; }
}
public class Tweet
{
public string UserName { get; set; }
[JsonProperty(PropertyName = "text")]
public string Message { get; set; }
[JsonProperty(PropertyName = "id")]
public object ID { get; set; }
[JsonProperty(PropertyName = "created_at")]
public DateTime TwitTime { get; set; }
}我尝试用以下方式来反序列化响应：
string str = TwitterAPI(Request.QueryString["screen_name"].ToString(), "10");
var root = JsonConvert.DeserializeObject<List<RootObject>>(str);其中TwitterAPI()将从以下Twitter API返回响应：
https://api.twitter.com/1.1/statuses/user_timeline.json下面是详细的错误：
回答 1
Stack Overflow用户
回答已采纳
发布于 2013-07-06 13:40:05
我刚刚找到了答案。
正如文档所说，问题出在Twitter API的局限性上：
“当应用程序超过给定API端点的速率限制时，Twitter API现在将返回HTTP429错误”
我超出了限制，所以它给出了一个异常。
如果达到给定端点的速率限制，这是您将看到的HTTP 429消息的正文：
{
"errors": [
{
"code": 88,
"message": "Rate limit exceeded"
}
]
}因此，它只返回JSON格式的错误消息，并将其传递给反序列化函数，反序列化函数将返回该错误。
感谢所有人的建议。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/17488515
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