5

我正在尝试遵循有关 XML 序列化的微软教程,但我遇到了一些问题!

这是 XML 文件,用作输入:

<?xml version="1.0" encoding="utf-8"?>
<Books xmlns:books="http://www.cpandl.com" xmlns:money="http://www.cohowinery.com">
  <money:Book>
    <books:TITLE>A Book Title</books:TITLE>
    <money:PRICE books:currency="US Dollar">
      <money:price>9.95</money:price>
    </money:PRICE>
  </money:Book>
</Books>

这是绑定 XML 的类:

public class OrderedItem
{
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public string ItemName;
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public string Description;
        [XmlElement(Namespace = "http://www.cohowinery.com")]
        public decimal UnitPrice;
        [XmlElement(Namespace = "http://www.cpandl.com")]
        public int Quantity;
        [XmlElement(Namespace = "http://www.cohowinery.com")]
        public decimal LineTotal;
        // A custom method used to calculate price per item.
        public void Calculate()
        {
            LineTotal = UnitPrice * Quantity;
        }
    }

此函数将 XML 读入“OrderedItem”类:

Console.WriteLine("Reading with Stream");

// Create an instance of the XmlSerializer.
var serializer = new XmlSerializer(typeof(OrderedItem));

// Reading the XML document requires a FileStream.
Stream reader = new FileStream(filename, FileMode.Open);

// Declare an object variable of the type to be deserialized.
// Call the Deserialize method to restore the object's state.
var i = (OrderedItem)serializer.Deserialize(reader);

Console.SetOut(new StreamWriter("a_output.xml"));
serializer.Serialize(Console.Out, i);

这是读取和重写后的 XML:

<?xml version="1.0" encoding="utf-8"?>
<OrderedItem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <ItemName xmlns="http://www.cpandl.com">Widget</ItemName>
  <Description xmlns="http://www.cpandl.com">Regular Widget</Description>
  <UnitPrice xmlns="http://www.cohowinery.com">2.3</UnitPrice>
  <Quantity xmlns="http://www.cpandl.com">10</Quantity>
  <LineTotal xmlns="http://www.cohowinery.com">23</LineTotal>
</OrderedItem>

如您所见,命名空间已扩展。我应该如何编写输出,以获得具有命名空间标签的相同 XML,而不是 uri?

4

4 回答 4

2

查看XmlSerializerNameSpaces课程:http: //msdn.microsoft.com/en-us/library/system.xml.serialization.xmlserializernamespaces.aspx

这个示例代码应该可以解决问题:

  XmlSerializer s = new XmlSerializer(typeof(OrderedItem));
  XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
  ns.Add("books", "http://www.cpandl.com");
  ns.Add("money", "http://www.cohowinery.com");    
  s.Serialize(new StreamWriter("a_output.xml"), i, ns);
于 2011-01-29T18:52:42.653 回答
1

您需要添加一个 type 的成员XmlSerializerNamespaces,用 标记XmlNamespaceDeclarationsAttribute

public class OrderedItem
{
  [XmlNamespaceDeclarations]
  public XmlSerializerNamespaces xmlns = new XmlSerializerNamespaces();

  ...
}

然后在序列化时添加命名空间声明:

OrderedItem item = new OrderedItem();
item.xmlns.Add("books", "http://www.cpandl.com");
item.xmlns.Add("money", "http://www.cohowinery.com"); 
XmlSerializer serializer = new XmlSerializer(typeof(OrderedItem));
...
于 2011-01-29T18:56:05.767 回答
0

您可能想查看用于序列化对象的重载方法:

默认序列化

为序列化定义命名空间

如那里所述,您可以XmlSerializerNamespaces使用以下代码行进行定义:

    // Create an XmlSerializerNamespaces object.
    XmlSerializerNamespaces ns = new XmlSerializerNamespaces();

    // Add two prefix-namespace pairs.
    ns.Add("inventory", "http://www.cpandl.com");
    ns.Add("money", "http://www.cohowinery.com");

希望有帮助。

于 2011-01-29T18:49:28.380 回答
0

为了将您的对象序列化为上面提供的格式,您必须IXmlSerializable在对象上实现接口(MSDN 文档)。此接口允许您实现可以完全控制类的序列化结果的方法(并将 xml 反序列化回您的对象)。

此处也讨论了此主题,请在此处查看更多信息:实现 IXmlSerializable 的正确方法

于 2011-01-29T18:50:03.400 回答