當我只需要XML的子元素時，如何反序列化對對象的XML響應？

Question

我從WebRequest中獲取以下XML：

<?xml version="1.0" encoding="UTF-8"?>
<search>
  <total_items>5</total_items>
  <page_size>10</page_size>
  <page_count>1</page_count>
  <page_number>1</page_number>
  <page_items></page_items>
  <first_item></first_item>
  <last_item></last_item>
  <search_time>0.044</search_time>
  <events>
    <event id="E0-001-053379749-0">
      <title>Antibalas</title>
      <url>http://test.com</url>
      <description>stuff</description>
      <start_time>2013-01-30 20:00:00</start_time>
      <stop_time></stop_time>
      <tz_id></tz_id>
      <tz_olson_path></tz_olson_path>
      <tz_country></tz_country>
      <tz_city></tz_city>
      <venue_id>V0-001-000189211-5</venue_id>
      <venue_url>http://blah.com</venue_url>
      <venue_name>Troubadour</venue_name>
      <venue_display>1</venue_display>
      <venue_address>9081 Santa Monica Boulevard</venue_address>
      <city_name>West Hollywood</city_name>
      <region_name>California</region_name>
      <region_abbr>CA</region_abbr>
      <postal_code>90069</postal_code>
      <country_name>United States</country_name>
      <country_abbr2>US</country_abbr2>
      <country_abbr>USA</country_abbr>
      <latitude>34.0815917</latitude>
      <longitude>-118.3892462</longitude>
      <geocode_type>EVDB Geocoder</geocode_type>
      <all_day>0</all_day>
      <recur_string></recur_string>
      <calendar_count></calendar_count>
      <comment_count></comment_count>
      <link_count></link_count>
      <going_count></going_count>
      <watching_count></watching_count>
      <created>2012-12-24 11:40:43</created>
      <owner>evdb</owner>
      <modified>2013-01-14 21:08:04</modified>
      <performers>
        <performer>
          <id>P0-001-000000517-4</id>
          <url>http://test.com</url>
          <name>Antibalas</name>
          <short_bio>Afro-beat / Funk / Experimental</short_bio>
          <creator>jfisher</creator>
          <linker>evdb</linker>
        </performer>
      </performers>
      <image>
        <url>http://s4.evcdn.com/images/small/I0-001/000/070/311-5.jpeg_/antibalas-11.jpeg</url>
        <width>48</width>
        <height>48</height>
        <caption></caption>
        <thumb>
          <url>http://s4.evcdn.com/images/thumb/I0-001/000/070/311-5.jpeg_/antibalas-11.jpeg</url>
          <width>48</width>
          <height>48</height>
        </thumb>
        <small>
          <url>http://s4.evcdn.com/images/small/I0-001/000/070/311-5.jpeg_/antibalas-11.jpeg</url>
          <width>48</width>
          <height>48</height>
        </small>
        <medium>
          <url>http://s4.evcdn.com/images/medium/I0-001/000/070/311-5.jpeg_/antibalas-11.jpeg</url>
          <width>128</width>
          <height>128</height>
        </medium>
      </image>
      <privacy>1</privacy>
      <calendars></calendars>
      <groups></groups>
      <going></going>
    </event>
  </events>
</search>

我創建了以下類：

public class EventSearch
{
    public int total_items { get; set; }
    public int page_size { get; set; }
    public int page_count { get; set; }
    public int page_number { get; set; }
    public int page_items { get; set; }
    public string first_item { get; set; }
    public string last_item { get; set; }
    public string search_time { get; set; }
    public List<Event> events { get; set; }
}

public class Event
{
    public string id { get; set; }
    public string title { get; set; }
    public string url { get; set; }
    public string description { get; set; }
    public DateTime start_time { get; set; }
    public string venue_id { get; set; }
    public string venue_url { get; set; }
    public string venue_name { get; set; }
    public string venue_address { get; set; }
    public string city_name { get; set; }
    public string region_name { get; set; }
    public string region_abbr { get; set; }
    public string postal_code { get; set; }
    public string country_name { get; set; }
    public string country_abbr { get; set; }
    public string country_abbr2 { get; set; }
    public double latitude { get; set; }
    public double longitude { get; set; }
    public List<Performer> performers { get; set; }
    public EventImage image { get; set; }
}

public class Performer
{
    public string id { get; set; }
    public string url { get; set; }
    public string name { get; set; }
    public string short_bio { get; set; }
}

public class EventImage
{
    public string url { get; set; }
    public int width { get; set; }
    public int height { get; set; }
    public Image thumb { get; set; }
    public Image small { get; set; }
    public Image medium { get; set; }
}

public class Image
{
    public string url { get; set; }
    public int width { get; set; }
    public int height { get; set; }
}

在我要調用的方法中，我想返回事件列表。 到目前為止，這是給我的錯誤：

沒想到。

碼：

var request = WebRequest.Create(url);
var response = request.GetResponse();

if (((HttpWebResponse)response).StatusCode == HttpStatusCode.OK)
{
    // Get the stream containing content returned by the server.
    Stream dataStream = response.GetResponseStream();
    // Open the stream using a StreamReader.
    StreamReader reader = new StreamReader(dataStream);

    XmlSerializer serializer = new XmlSerializer(typeof(EventSearch));
    EventSearch deserialized = (EventSearch)serializer.Deserialize(reader);

    return deserialized.events;
}

我不確定下一步該怎么做。 我需要注釋我的課程嗎？

Answer 1

是的，你將需要添加一些Attributes到您的classes的XML元素到你的對象映射。

這應該可以工作，但是我不得不更改一些東西，Xml中的DateTime是錯誤的fromat，所以我將其設置為字符串（可以根據需要進行解析）， page_items也是一個int但是它是一個空元素xml，您將無法反序列化它，如果它有可能為空，則必須更改為字符串。

[XmlType("search")]
public class EventSearch
{
    public int total_items { get; set; }
    public int page_size { get; set; }
    public int page_count { get; set; }
    public int page_number { get; set; }
   // public int? page_items { get; set; }
    public string first_item { get; set; }
    public string last_item { get; set; }
    public string search_time { get; set; }
    public List<Event> events { get; set; }
}

[XmlType("event")]
public class Event
{
    [XmlAttribute("id")]
    public string id { get; set; }
    public string title { get; set; }
    public string url { get; set; }
    public string description { get; set; }
    public string start_time { get; set; }
    public string venue_id { get; set; }
    public string venue_url { get; set; }
    public string venue_name { get; set; }
    public string venue_address { get; set; }
    public string city_name { get; set; }
    public string region_name { get; set; }
    public string region_abbr { get; set; }
    public string postal_code { get; set; }
    public string country_name { get; set; }
    public string country_abbr { get; set; }
    public string country_abbr2 { get; set; }
    public double latitude { get; set; }
    public double longitude { get; set; }
    public List<Performer> performers { get; set; }
    public EventImage image { get; set; }
}

[XmlType("performer")]
public class Performer
{
    public string id { get; set; }
    public string url { get; set; }
    public string name { get; set; }
    public string short_bio { get; set; }
}

[XmlType("image")]
public class EventImage
{
    public string url { get; set; }
    public int width { get; set; }
    public int height { get; set; }
    public Image thumb { get; set; }
    public Image small { get; set; }
    public Image medium { get; set; }
}

[XmlType("thumb")]
public class Image
{
    public string url { get; set; }
    public int width { get; set; }
    public int height { get; set; }
}

我直接使用以下文件從文件中進行了測試：

using (FileStream stream = new FileStream("C:\\Test.xml", FileMode.Open))
{
    XmlSerializer serializer = new XmlSerializer(typeof(EventSearch));
    EventSearch deserialized = (EventSearch)serializer.Deserialize(stream);
}

但是您來自Webresponce的Stream應與FileStream相同

希望這可以幫助 ：）