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Senia_sweety
Asked:2022-05-02 03:22:11 +0800 CST2022-05-02 03:22:11 +0800 CST

如何解析以下 XML？

  • 772

有一个 XML 文件：

<ValCurs Date="01.05.2021" name="Foreign Currency Market">
   <Valute ID="R01010">
      <NumCode>036</NumCode>
      <CharCode>AUD</CharCode>
      <Nominal>1</Nominal>
      <Name>Австралийский доллар</Name>
      <Value>58,1546</Value>
   </Valute>
   <Valute ID="R01020A">
      <NumCode>944</NumCode>
      <CharCode>AZN</CharCode>
      <Nominal>1</Nominal>
      <Name>Азербайджанский манат</Name>
      <Value>44,0524</Value>
   </Valute>
      <Valute ID="R01035">
      <NumCode>826</NumCode>
      <CharCode>GBP</CharCode>
      <Nominal>1</Nominal>
      <Name>Фунт стерлингов Соединенного королевства</Name>
      <Value>104,1694</Value>
   </Valute>
      <Valute ID="R01060">
      <NumCode>051</NumCode>
      <CharCode>AMD</CharCode>
      <Nominal>100</Nominal>
      <Name>Армянских драмов</Name>
      <Value>14,3761</Value>
   </Valute>
</ValCurs>

http://www.cbr.ru/scripts/XML_daily.asp XML 取自该资源。

问题是反序列化 XML 文件。这是要在 Main 中检查的类和输出信息的示例。
它目前给出一个错误

InvalidOperationException: ValCurs xmlns='' 不是预期的。

澄清：我正在使用.Netcore 3.1

[Serializable()]
[XmlRoot(ElementName = "ValCurs")]
class CurrencyClass
{
    [XmlElement(ElementName = "Valute")]
    public List<Valute> Valutes { get; set; }
}

[Serializable()]
class Valute
{
    [XmlAttribute(AttributeName = "ID")]
    public string ID { get; set; }
    [XmlElement(ElementName = "NumCode")]
    public string NumCode { get; set; }

    [XmlElement(ElementName = "CharCode")]
    public string CharCode { get; set; }
    [XmlElement(ElementName = "Nominal")]
    public string Nominal { get; set; }
    [XmlElement(ElementName = "Name")]
    public string Name { get; set; }
    [XmlElement(ElementName = "Value")]
    public string Value { get; set; }
}

static void Main(string[] args)
{
    var formatter = new XmlSerializer(typeof(DocumentClass));
    using (FileStream fs = new FileStream(@"D:\repositivs\ConsoleApp1\CurValute.xml", FileMode.Open))
    {
        var currencyTest = (CurrencyClass)formatter.Deserialize(fs);
        Console.WriteLine("Объект десериализован");
        foreach (Valute valute in currencyTest.Valutes)
        {
            Console.WriteLine("ID: {0}", valute.ID[0]);
            Console.WriteLine("Name: {0} ", valute.Name);
            Console.WriteLine("Nominal: {0}", valute.Nominal);
            Console.WriteLine("Value: {0} ", valute.Value);
        }
    }
}

另外，曾尝试使用 XmlReader，但未成功。

c#

1 个回答

  1. Best Answer
    1. 我们打开第一个将 XML 转换为 C# 类的可用服务，将您的 XML 复制到那里，我们得到输出
        [XmlRoot(ElementName = "Valute")]
    public class Valute
    {
        [XmlElement(ElementName = "NumCode")]
        public string NumCode { get; set; }
        [XmlElement(ElementName = "CharCode")]
        public string CharCode { get; set; }
        [XmlElement(ElementName = "Nominal")]
        public string Nominal { get; set; }
        [XmlElement(ElementName = "Name")]
        public string Name { get; set; }
        [XmlElement(ElementName = "Value")]
        public string Value { get; set; }
        [XmlAttribute(AttributeName = "ID")]
        public string ID { get; set; }
    }

    [XmlRoot(ElementName = "ValCurs")]
    public class ValCurs
    {
        [XmlElement(ElementName = "Valute")]
        public List<Valute> Valute { get; set; }
        [XmlAttribute(AttributeName = "Date")]
        public string Date { get; set; }
        [XmlAttribute(AttributeName = "name")]
        public string Name { get; set; }
    }

    您也可以在工作室中使用 PasteSpecial->XML 作为类，会有类似的东西，只是稍微冗长一些。

    2.

            static void Main(string[] args)
        {
            Console.OutputEncoding = Encoding.UTF8; // для кирилицы

            var serializer = new XmlSerializer(typeof(ValCurs));
            using var reader = new StringReader(xml);

            var obj = serializer.Deserialize(reader) as ValCurs;
            Console.WriteLine($"{obj.Date} | {obj.Name}");
            foreach (var v in obj.Valute) 
                Console.WriteLine($"{v.ID} | {v.Name} | {v.Nominal} | {v.NumCode} | {v.Value}");
        }

    线路本身

            static string xml = 
@"<ValCurs Date=""01.05.2021"" name=""Foreign Currency Market"">
   <Valute ID=""R01010"">
      <NumCode>036</NumCode>
      <CharCode>AUD</CharCode>
      <Nominal>1</Nominal>
      <Name>Австралийский доллар</Name>
      <Value>58,1546</Value>
   </Valute>
   <Valute ID=""R01020A"">
      <NumCode>944</NumCode>
      <CharCode>AZN</CharCode>
      <Nominal>1</Nominal>
      <Name>Азербайджанский манат</Name>
      <Value>44,0524</Value>
   </Valute>
      <Valute ID=""R01035"">
      <NumCode>826</NumCode>
      <CharCode>GBP</CharCode>
      <Nominal>1</Nominal>
      <Name>Фунт стерлингов Соединенного королевства</Name>
      <Value>104,1694</Value>
   </Valute>
      <Valute ID=""R01060"">
      <NumCode>051</NumCode>
      <CharCode>AMD</CharCode>
      <Nominal>100</Nominal>
      <Name>Армянских драмов</Name>
      <Value>14,3761</Value>
   </Valute>
</ValCurs>";
    }

    ...

    • 3

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