将xml反序列化为对象

时间：2015-06-13 20:24:01

标签： c# xml

我试图将xml反序列化为对象。但我一直收到这个错误：

  

System.InvalidOperationException＆＃39;发生在System.Xml.dll中   附加信息：XML文档（1,1）包含错误。

这是我用于反序列化的类

[XmlRoot("MRData")]
public class DriverData
{
    [XmlElement("series")]
    public string series { get; set; }

    [XmlElement("url")]
    public string url { get; set; }

    [XmlElement("limit")]
    public int limit { get; set; }

    [XmlElement("offset")]
    public int offset { get; set; }

    [XmlElement("total")]
    public int total { get; set; }
}


[XmlRoot("DriverTable")]
public class DriverTable
{
    [XmlElement("Driver")]
    public List<Driver> Drivers { get; set; }
}

public class Driver
{
    [XmlElement("driverId")]
    public string driverId { get; set; }

    [XmlElement("url")]
    public string url { get; set; }

    [XmlElement("GivenName")]
    public string GivenName { get; set; }

    [XmlElement("FamilyName")]
    public string FamilyName { get; set; }

    [XmlElement("DateOfBirth")]
    public DateTime DateOfBirth { get; set; }

    [XmlElement("Nationality")]
    public string Nationality { get; set; }

}

我确信Driver和DriverTable是正确的，但错误可能在DriverData？

class RacingApiClient
{
    public ObservableCollection<DriverData> GetDrivers()
    {
        var url = "http://ergast.com/api/f1/drivers";

        ObservableCollection<DriverData> drivers = new ObservableCollection<DriverData>();

        // Syncronious comsumption
        var syncClient = new WebClient();
        var content = syncClient.DownloadString(url);

        XmlSerializer serializer = new XmlSerializer(typeof(ObservableCollection<DriverData>));

        using (TextReader reader = new StringReader(url))
        {
            drivers = ((ObservableCollection<DriverData>)serializer.Deserialize(reader));
        }
        return drivers;
    }
}

此行会引发错误：drivers=((ObservableCollection<DriverData>)serializer.Deserialize(reader));

XML响应是：

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/xsl" href="http://ergast.com/schemas/mrd-1.4.xsl"?>
<MRData xmlns="http://ergast.com/mrd/1.4" series="f1" url="http://ergast.com/api/f1/drivers" limit="30" offset="0" total="833">
    <DriverTable>
        <Driver driverId="abate" url="http://en.wikipedia.org/wiki/Carlo_Mario_Abate">
            <GivenName>Carlo</GivenName>
            <FamilyName>Abate</FamilyName>
            <DateOfBirth>1932-07-10</DateOfBirth>
            <Nationality>Italian</Nationality>
        </Driver>
        <Driver driverId="abecassis" url="http://en.wikipedia.org/wiki/George_Abecassis">
            <GivenName>George</GivenName>
            <FamilyName>Abecassis</FamilyName>
            <DateOfBirth>1913-03-21</DateOfBirth>
            <Nationality>British</Nationality>
        </Driver>
        <Driver driverId="acheson" url="http://en.wikipedia.org/wiki/Kenny_Acheson">
            <GivenName>Kenny</GivenName>
            <FamilyName>Acheson</FamilyName>
            <DateOfBirth>1957-11-27</DateOfBirth>
            <Nationality>British</Nationality>
        </Driver>
        <Driver driverId="adams" url="http://en.wikipedia.org/wiki/Philippe_Adams">
            <GivenName>Philippe</GivenName>
            <FamilyName>Adams</FamilyName>
            <DateOfBirth>1960-11-19</DateOfBirth>
            <Nationality>Belgian</Nationality>
        </Driver>
        <Driver driverId="ader" url="http://en.wikipedia.org/wiki/Walt_Ader">
            <GivenName>Walt</GivenName>
            <FamilyName>Ader</FamilyName>
            <DateOfBirth>1912-12-15</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="adolff" url="http://en.wikipedia.org/wiki/Kurt_Adolff">
            <GivenName>Kurt</GivenName>
            <FamilyName>Adolff</FamilyName>
            <DateOfBirth>1921-11-05</DateOfBirth>
            <Nationality>German</Nationality>
        </Driver>
        <Driver driverId="agabashian" url="http://en.wikipedia.org/wiki/Fred_Agabashian">
            <GivenName>Fred</GivenName>
            <FamilyName>Agabashian</FamilyName>
            <DateOfBirth>1913-08-21</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="ahrens" url="http://en.wikipedia.org/wiki/Kurt_Ahrens,_Jr.">
            <GivenName>Kurt</GivenName>
            <FamilyName>Ahrens</FamilyName>
            <DateOfBirth>1940-04-19</DateOfBirth>
            <Nationality>German</Nationality>
        </Driver>
        <Driver driverId="albers" code="ALB" url="http://en.wikipedia.org/wiki/Christijan_Albers">
            <GivenName>Christijan</GivenName>
            <FamilyName>Albers</FamilyName>
            <DateOfBirth>1979-04-16</DateOfBirth>
            <Nationality>Dutch</Nationality>
        </Driver>
        <Driver driverId="alboreto" url="http://en.wikipedia.org/wiki/Michele_Alboreto">
            <GivenName>Michele</GivenName>
            <FamilyName>Alboreto</FamilyName>
            <DateOfBirth>1956-12-23</DateOfBirth>
            <Nationality>Italian</Nationality>
        </Driver>
        <Driver driverId="alesi" url="http://en.wikipedia.org/wiki/Jean_Alesi">
            <GivenName>Jean</GivenName>
            <FamilyName>Alesi</FamilyName>
            <DateOfBirth>1964-06-11</DateOfBirth>
            <Nationality>French</Nationality>
        </Driver>
        <Driver driverId="alguersuari" code="ALG" url="http://en.wikipedia.org/wiki/Jaime_Alguersuari">
            <GivenName>Jaime</GivenName>
            <FamilyName>Alguersuari</FamilyName>
            <DateOfBirth>1990-03-23</DateOfBirth>
            <Nationality>Spanish</Nationality>
        </Driver>
        <Driver driverId="alliot" url="http://en.wikipedia.org/wiki/Philippe_Alliot">
            <GivenName>Philippe</GivenName>
            <FamilyName>Alliot</FamilyName>
            <DateOfBirth>1954-07-27</DateOfBirth>
            <Nationality>French</Nationality>
        </Driver>
        <Driver driverId="allison" url="http://en.wikipedia.org/wiki/Cliff_Allison">
            <GivenName>Cliff</GivenName>
            <FamilyName>Allison</FamilyName>
            <DateOfBirth>1932-02-08</DateOfBirth>
            <Nationality>British</Nationality>
        </Driver>
        <Driver driverId="alonso" code="ALO" url="http://en.wikipedia.org/wiki/Fernando_Alonso">
            <PermanentNumber>14</PermanentNumber>
            <GivenName>Fernando</GivenName>
            <FamilyName>Alonso</FamilyName>
            <DateOfBirth>1981-07-29</DateOfBirth>
            <Nationality>Spanish</Nationality>
        </Driver>
        <Driver driverId="amati" url="http://en.wikipedia.org/wiki/Giovanna_Amati">
            <GivenName>Giovanna</GivenName>
            <FamilyName>Amati</FamilyName>
            <DateOfBirth>1962-07-20</DateOfBirth>
            <Nationality>Italian</Nationality>
        </Driver>
        <Driver driverId="amick" url="http://en.wikipedia.org/wiki/Red_Amick">
            <GivenName>Red</GivenName>
            <FamilyName>Amick</FamilyName>
            <DateOfBirth>1929-01-19</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="george_amick" url="http://en.wikipedia.org/wiki/George_Amick">
            <GivenName>George</GivenName>
            <FamilyName>Amick</FamilyName>
            <DateOfBirth>1924-10-24</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="amon" url="http://en.wikipedia.org/wiki/Chris_Amon">
            <GivenName>Chris</GivenName>
            <FamilyName>Amon</FamilyName>
            <DateOfBirth>1943-07-20</DateOfBirth>
            <Nationality>New Zealander</Nationality>
        </Driver>
        <Driver driverId="anderson" url="http://en.wikipedia.org/wiki/Bob_Anderson_(racing_driver)">
            <GivenName>Bob</GivenName>
            <FamilyName>Anderson</FamilyName>
            <DateOfBirth>1931-05-19</DateOfBirth>
            <Nationality>British</Nationality>
        </Driver>
        <Driver driverId="andersson" url="http://en.wikipedia.org/wiki/Conny_Andersson">
            <GivenName>Conny</GivenName>
            <FamilyName>Andersson</FamilyName>
            <DateOfBirth>1939-12-28</DateOfBirth>
            <Nationality>Swedish</Nationality>
        </Driver>
        <Driver driverId="andretti" url="http://en.wikipedia.org/wiki/Michael_Andretti">
            <GivenName>Michael</GivenName>
            <FamilyName>Andretti</FamilyName>
            <DateOfBirth>1962-10-02</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="mario_andretti" url="http://en.wikipedia.org/wiki/Mario_Andretti">
            <GivenName>Mario</GivenName>
            <FamilyName>Andretti</FamilyName>
            <DateOfBirth>1940-02-28</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="andrews" url="http://en.wikipedia.org/wiki/Keith_Andrews_(driver)">
            <GivenName>Keith</GivenName>
            <FamilyName>Andrews</FamilyName>
            <DateOfBirth>1920-06-15</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="apicella" url="http://en.wikipedia.org/wiki/Marco_Apicella">
            <GivenName>Marco</GivenName>
            <FamilyName>Apicella</FamilyName>
            <DateOfBirth>1965-10-07</DateOfBirth>
            <Nationality>Italian</Nationality>
        </Driver>
        <Driver driverId="armi" url="http://en.wikipedia.org/wiki/Frank_Armi">
            <GivenName>Frank</GivenName>
            <FamilyName>Armi</FamilyName>
            <DateOfBirth>1918-10-12</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="arnold" url="http://en.wikipedia.org/wiki/Chuck_Arnold">
            <GivenName>Chuck</GivenName>
            <FamilyName>Arnold</FamilyName>
            <DateOfBirth>1926-05-30</DateOfBirth>
            <Nationality>American</Nationality>
        </Driver>
        <Driver driverId="arnoux" url="http://en.wikipedia.org/wiki/Ren%C3%A9_Arnoux">
            <GivenName>René</GivenName>
            <FamilyName>Arnoux</FamilyName>
            <DateOfBirth>1948-07-04</DateOfBirth>
            <Nationality>French</Nationality>
        </Driver>
        <Driver driverId="arundell" url="http://en.wikipedia.org/wiki/Peter_Arundell">
            <GivenName>Peter</GivenName>
            <FamilyName>Arundell</FamilyName>
            <DateOfBirth>1933-11-08</DateOfBirth>
            <Nationality>British</Nationality>
        </Driver>
        <Driver driverId="ascari" url="http://en.wikipedia.org/wiki/Alberto_Ascari">
            <GivenName>Alberto</GivenName>
            <FamilyName>Ascari</FamilyName>
            <DateOfBirth>1918-07-13</DateOfBirth>
            <Nationality>Italian</Nationality>
        </Driver>
    </DriverTable>
</MRData>

如何修复错误，并返回ObservableCollection？

1 个答案:

答案 0 :(得分：1)

您有很多问题：

  1. 您正尝试将单个MRData元素反序列化为ObservableCollection<DriverData>。这不是一种碰撞。为单个对象创建一个序列化器：

    XmlSerializer serializer = new XmlSerializer(typeof(DriverData));

  2. 您已忽略MRData的命名空间，您需要更改XmlRoot属性以包含此内容：

    [XmlRoot("MRData", Namespace = "http://ergast.com/mrd/1.4")]
    3. 您的DriverTable班级定义中缺少

  3. DriverData。您还为所有其他属性添加了XmlElement个属性。这些是属性，而不是元素，因此应具有XmlAttribute属性。完整的更正定义是：

    [XmlRoot("MRData", Namespace = "http://ergast.com/mrd/1.4")]
public class DriverData
{
    [XmlAttribute("series")]
    public string series { get; set; }

    [XmlAttribute("url")]
    public string url { get; set; }

    [XmlAttribute("limit")]
    public int limit { get; set; }

    [XmlAttribute("offset")]
    public int offset { get; set; }

    [XmlAttribute("total")]
    public int total { get; set; }

    [XmlElement("DriverTable")]
    public DriverTable DriverTable { get; set; }
}

  4. Driver上的两个属性同样具有XmlElement属性，而不是XmlAttribute属性：

    [XmlAttribute("driverId")]
public string driverId { get; set; }

[XmlAttribute("url")]
public string url { get; set; }

  5. 您的反序列化程序使用正在阅读StringReader的{​​{1}}。这是URI，而不是您的内容。这应该是：

    url

    6. 请参阅此处的工作示例：https://dotnetfiddle.net/bkYr7Q

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