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Google Elevations API で RestSharp を試すことに成功した後、Flickr API で試してみたいと思いました。Elevations API では、Elevation クエリに対する XML 応答から派生した一連の POCO クラスを作成しました。Flickr API についても同じことをしたいと考えています。(素晴らしい FlickrNet があることは理解していますが、RestSharp で試してみたかったのです)。

動作している POCO クラスのバージョンがありますが、一部の情報が欠落しています。

XML での応答は次のとおりです。

<?xml version="1.0" encoding="utf-8" ?>
<rsp stat="ok">
  <photos page="1" pages="2" perpage="100" total="117">
    <photo id="8626881695" owner="62679167@N05" secret="e82b58b22f" server="8519" farm="9" title="IMG_3149.JPG" ispublic="1" isfriend="0" isfamily="0" latitude="51.507431" longitude="-0.122815" accuracy="16" context="0" place_id="I.7fkAxTUrq7FstgaA" woeid="20094318" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_t.jpg" height_t="100" width_t="100" url_s="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_m.jpg" height_s="240" width_s="240" url_q="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f.jpg" height_m="500" width_m="500" url_n="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_n.jpg" height_n="320" width_n="320" url_z="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_z.jpg" height_z="640" width_z="640" url_c="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_c.jpg" height_c="800" width_c="800" url_l="http://farm9.staticflickr.com/8519/8626881695_e82b58b22f_b.jpg" height_l="1024" width_l="1024" url_o="http://farm9.staticflickr.com/8519/8626881695_a923d82fe6_o.jpg" height_o="2112" width_o="2112" />
    <photo id="8626886683" owner="62679167@N05" secret="f308e6462c" server="8240" farm="9" title="" ispublic="1" isfriend="0" isfamily="0" latitude="51.507236" longitude="-0.122338" accuracy="16" context="0" place_id="I.7fkAxTUrq7FstgaA" woeid="20094318" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_t.jpg" height_t="100" width_t="100" url_s="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_m.jpg" height_s="240" width_s="240" url_q="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8240/8626886683_f308e6462c.jpg" height_m="500" width_m="500" url_n="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_n.jpg" height_n="320" width_n="320" url_z="http://farm9.staticflickr.com/8240/8626886683_f308e6462c_z.jpg" height_z="612" width_z="612" url_o="http://farm9.staticflickr.com/8240/8626886683_c98a1a9f02_o.jpg" height_o="612" width_o="612" />
    <photo id="8626885149" owner="62679167@N05" secret="4dde1595e4" server="8387" farm="9" title="IMG_3147.JPG" ispublic="1" isfriend="0" isfamily="0" latitude="51.509048" longitude="-0.124458" accuracy="16" context="0" place_id="aOppNH9QV7zH7w" woeid="15652" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_t.jpg" height_t="100" width_t="100" url_s="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_m.jpg" height_s="240" width_s="240" url_q="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4.jpg" height_m="500" width_m="500" url_n="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_n.jpg" height_n="320" width_n="320" url_z="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_z.jpg" height_z="640" width_z="640" url_c="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_c.jpg" height_c="800" width_c="800" url_l="http://farm9.staticflickr.com/8387/8626885149_4dde1595e4_b.jpg" height_l="1024" width_l="1024" url_o="http://farm9.staticflickr.com/8387/8626885149_8f928ce11a_o.jpg" height_o="2112" width_o="2112" />
    <photo id="8626825995" owner="24343055@N03" secret="0ba9a79f43" server="8262" farm="9" title="Heroes Salute" ispublic="1" isfriend="0" isfamily="0" latitude="51.503119" longitude="-0.149366" accuracy="16" context="0" place_id="yy7TEQtVUbhVOw" woeid="43246" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_t.jpg" height_t="75" width_t="100" url_s="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_m.jpg" height_s="180" width_s="240" url_q="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43.jpg" height_m="375" width_m="500" url_n="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_n.jpg" height_n="240" width_n="320" url_z="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_z.jpg" height_z="480" width_z="640" url_c="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_c.jpg" height_c="600" width_c="800" url_l="http://farm9.staticflickr.com/8262/8626825995_0ba9a79f43_b.jpg" height_l="768" width_l="1024" url_o="http://farm9.staticflickr.com/8262/8626825995_309be230ce_o.jpg" height_o="2313" width_o="3085" />
    <photo id="8626826765" owner="24343055@N03" secret="a14c1a395c" server="8526" farm="9" title="Long Overdue" ispublic="1" isfriend="0" isfamily="0" latitude="51.503173" longitude="-0.149318" accuracy="16" context="0" place_id="yy7TEQtVUbhVOw" woeid="43246" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_t.jpg" height_t="100" width_t="75" url_s="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_m.jpg" height_s="240" width_s="180" url_q="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c.jpg" height_m="500" width_m="375" url_n="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_n.jpg" height_n="320" width_n="240" url_z="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_z.jpg" height_z="640" width_z="480" url_c="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_c.jpg" height_c="800" width_c="600" url_l="http://farm9.staticflickr.com/8526/8626826765_a14c1a395c_b.jpg" height_l="1024" width_l="768" url_o="http://farm9.staticflickr.com/8526/8626826765_7db667a6ed_o.jpg" height_o="3121" width_o="2340" />
    <photo id="8626843195" owner="24343055@N03" secret="bf3c7309a5" server="8104" farm="9" title="Bus Bonus" ispublic="1" isfriend="0" isfamily="0" latitude="51.503319" longitude="-0.149323" accuracy="16" context="0" place_id="yy7TEQtVUbhVOw" woeid="43246" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_t.jpg" height_t="100" width_t="75" url_s="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_m.jpg" height_s="240" width_s="180" url_q="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5.jpg" height_m="500" width_m="375" url_n="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_n.jpg" height_n="320" width_n="240" url_z="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_z.jpg" height_z="640" width_z="480" url_c="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_c.jpg" height_c="800" width_c="600" url_l="http://farm9.staticflickr.com/8104/8626843195_bf3c7309a5_b.jpg" height_l="1024" width_l="768" url_o="http://farm9.staticflickr.com/8104/8626843195_601d42bdd2_o.jpg" height_o="3067" width_o="2300" />
    <photo id="8626786831" owner="24664325@N06" secret="c30d6881bf" server="8261" farm="9" title="Breaking the girl" ispublic="1" isfriend="0" isfamily="0" latitude="51.508234" longitude="-0.128188" accuracy="16" context="0" place_id="1EPGyGtTUrrDXJmGCA" woeid="20094364" geo_is_family="0" geo_is_friend="0" geo_is_contact="0" geo_is_public="1" url_sq="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_s.jpg" height_sq="75" width_sq="75" url_t="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_t.jpg" height_t="64" width_t="100" url_s="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_m.jpg" height_s="155" width_s="240" url_q="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_q.jpg" height_q="150" width_q="150" url_m="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf.jpg" height_m="322" width_m="500" url_n="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_n.jpg" height_n="206" width_n="320" url_z="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_z.jpg" height_z="412" width_z="640" url_c="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_c.jpg" height_c="515" width_c="800" url_l="http://farm9.staticflickr.com/8261/8626786831_c30d6881bf_b.jpg" height_l="644" width_l="1000" />
...cut for brevity
  </photos>
</rsp>

機能するが情報が欠落しているPOCOクラスは次のとおりです。

public class Reply
  {
    public string stat {get;set;}
    public List<Photo> photos {get;set;}
  }

  public class Photo
  {
    public string id {get;set;}
    public string owner {get;set;}
    public string secret {get;set;}
    public string server {get;set;}
    public string farm {get;set;}
    public string title {get;set;}
    public string ispublic {get;set;}
    public string isfriend {get;set;}
    public string isfamily {get;set;}
    public string latitude {get;set;}
    public string longitude {get;set;}
    public string accuracy {get;set;}
    public string context {get;set;}
    public string place_id {get;set;}
    public string woeid {get;set;}
    public string geo_is_family {get;set;}
    public string geo_is_contact {get;set;}
    public string geo_is_public {get;set;}
    public string url_sq {get;set;}
    public string height_sq {get;set;}
    public string width_sq {get;set;}
    public string url_t {get;set;}
    public string height_t {get;set;}
    public string width_t {get;set;}
    public string url_s {get;set;}
    public string height_s {get;set;}
    public string width_s {get;set;}
    public string url_q {get;set;}
    public string height_q {get;set;}
    public string width_q {get;set;}
    public string url_m {get;set;}
    public string height_m {get;set;}
    public string width_m {get;set;}
    public string url_n {get;set;}
    public string height_n {get;set;}
    public string width_n {get;set;}
    public string url_z {get;set;}
    public string height_z {get;set;}
    public string width_z {get;set;}
    public string url_c {get;set;}
    public string height_c {get;set;}
    public string width_c {get;set;}
    public string url_l {get;set;}
    public string height_l {get;set;}
    public string width_l {get;set;}
    public string url_o {get;set;}
    public string height_o {get;set;}
    public string width_o {get;set;}

  }

photos 要素の属性も取得したいと思います。

<photos page="1" pages="2" perpage="100" total="117">

上記のクラスでは、これらの属性を定義していないため、これらの属性に到達する論理的な方法がわかりません。次のクラスを試しました（ Photo クラスは上記と同じです）：

 public class Reply
  {
    public string stat {get;set;}
    public Photos photos {get;set;}

  }
  public class Photos
  {
    public string page {get;set;}
    public string pages {get;set;}
    public string perpage {get;set;}
    public string total {get;set;}
    public List<Photo> photoList {get;set;}
  }

アクセスしようとするresponse.Data.photos.pageと、Object reference not set to an instance of an objectエラーが発生します。

photos 要素の属性にアクセスし、写真のリストを取得できるようにクラスを設計する方法について、誰かが光を当てることができますか?

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1 に答える 1

0

デフォルトでは、RestSharp は属性をデシリアライズしません。github.com/restsharp/RestSharp/wiki/Deserialization 違いは、それがインラインに他に何もない要素 (つまり、写真) である場合、属性を逆シリアル化できることです。属性を持つ要素やその他の要素が含まれている要素には、カスタム デシリアライザーが必要なようです。代わりに、Xml.Linq を使用して photos 要素の属性にアクセスしました。

System.Xml.Linq.XDocument xDoc = System.Xml.Linq.XDocument.Parse(response.Content); 
IEnumerable<int> page = 
   from item in xDoc.Descendants("photos") 
   select (int) item.Attribute("page"); etc...
于 2013-04-09T06:47:48.613 に答える