C# XmlSerializer 在子節點中定義帶前綴的命名空間

Question

我需要使用 C# 創建一個 XML 文檔，如下所示：

<?xml version="1.0" encoding="utf-8"?>
<Container>
  <Info>
    <request xmlns:a="http://www.UKMail.com/Services/Contracts/DataContracts">
      <a:AuthenticationToken>token</a:AuthenticationToken>
      <a:Username>username</a:Username>
      <a:ConsignmentNumber>12345</a:ConsignmentNumber>
    </request>
  </Info>
</Container>

關鍵部分是帶有前綴 (xmlns:a=...) 的命名空間定義位於子節點中，而不是根節點中。 到目前為止，我只能出示這份文件：

<?xml version="1.0" encoding="utf-8"?>
<Container xmlns:a="http://www.UKMail.com/Services/Contracts/DataContracts">
  <Info>
    <a:request>
      <a:AuthenticationToken>token</a:AuthenticationToken>
      <a:Username>username</a:Username>
      <a:ConsignmentNumber>12345</a:ConsignmentNumber>
    </a:request>
  </Info>
</Container>

這被 web 服務拒絕 - 如果您將 xmlns:a.. 部分移動到請求節點，web 服務會對此感到滿意。

這就是我現在生成 XML 的方式：

class Program
    {
        static void Main(string[] args)
        {
            SerializeObject("XmlNamespaces.xml");
        }

        public static void SerializeObject(string filename)
        {
            var mySerializer = new XmlSerializer(typeof(Container));
            // Writing a file requires a TextWriter.
            TextWriter myWriter = new StreamWriter(filename);

            // Creates an XmlSerializerNamespaces and adds two
            // prefix-namespace pairs.
            var myNamespaces = new XmlSerializerNamespaces();
            myNamespaces.Add("a", "http://www.UKMail.com/Services/Contracts/DataContracts");


            Container container = new Container
            {
                Info = new CancelConsignmentRequest
                {
                    request = new CancelConsignmentRequestInfo
                    {
                        AuthenticationToken = "token",
                        ConsignmentNumber = "12345",
                        Username = "username"
                    }
                }
            };

            mySerializer.Serialize(myWriter, container, myNamespaces);
            myWriter.Close();
        }
    }

    public class Container
    {
        public CancelConsignmentRequest Info { get; set; } = new CancelConsignmentRequest();
    }

    [XmlRoot(Namespace = "http://www.UKMail.com/Services/Contracts/ServiceContracts")]
    public class CancelConsignmentRequest
    {
        [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts")]
        public CancelConsignmentRequestInfo request { get; set; } = new CancelConsignmentRequestInfo();
    }

    public class CancelConsignmentRequestInfo
    {
        [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 0)]
        public string AuthenticationToken { get; set; }
        [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 1)]
        public string Username { get; set; }

        [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 2)]
        public string ConsignmentNumber { get; set; }
    }

我無法弄清楚如何將帶有前綴的名稱空間定義放置在其中一個子節點中。 有誰知道如何在 C# 中執行此操作嗎？ 謝謝。

Answer 1

這個有可能。 下面的代碼可以滿足您的要求。

class Program
{
    static void Main(string[] args)
    {
        SerializeObject("XmlNamespaces.xml");
    }

    public static void SerializeObject(string filename)
    {
        var mySerializer = new XmlSerializer(typeof(Container));
        // Writing a file requires a TextWriter.
        TextWriter myWriter = new StreamWriter(filename);

        // Creates an XmlSerializerNamespaces and adds two
        // prefix-namespace pairs.
        var myNamespaces = new XmlSerializerNamespaces();
        //myNamespaces.Add("a", "http://www.UKMail.com/Services/Contracts/DataContracts");

        Container container = new Container
        {
            Info = new CancelConsignmentRequest
            {
                request = new CancelConsignmentRequestInfo
                {
                    AuthenticationToken = "token",
                    ConsignmentNumber = "12345",
                    Username = "username"
                }
            }
        };

        mySerializer.Serialize(myWriter, container, myNamespaces);
        myWriter.Close();
    }
}

public class Container
{
    public CancelConsignmentRequest Info { get; set; } = new CancelConsignmentRequest();
}

public class CancelConsignmentRequest
{
    public CancelConsignmentRequestInfo request { get; set; } = new CancelConsignmentRequestInfo();
}

[XmlRoot(Namespace = "http://www.UKMail.com/Services/Contracts/ServiceContracts")]
public class CancelConsignmentRequestInfo
{
    [XmlNamespaceDeclarations]
    public XmlSerializerNamespaces xmlns = new XmlSerializerNamespaces(
        new[] { new XmlQualifiedName("a", "http://www.UKMail.com/Services/Contracts/DataContracts"), });
    [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 0)]
    public string AuthenticationToken { get; set; }
    [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 1)]
    public string Username { get; set; }

    [XmlElement(Namespace = "http://www.UKMail.com/Services/Contracts/DataContracts", Order = 2)]
    public string ConsignmentNumber { get; set; }
}