反序列化 XML 从流到 List<T>

Question

我在 XML 文件中有一些数据正在通过流读取。我可以访问流对象，我必须使用它来反序列化数据并填充一个列表。下面给出了我的模型 class

[XmlRoot("invoices")]
public class Invoice
{       
    [XmlElement(ElementName = "description", IsNullable= true)]
    public string Description { get; set; }

    [XmlElement(ElementName = "invoice_date")]
    public string InvoiceDate { get; set; }

    [XmlElement(ElementName = "invoice_number")]
    public string InvoiceNumber { get; set; }

    [XmlElement(ElementName = "date_due")]
    public string DateDue { get; set; }

    [XmlElement(ElementName = "amount")]
    public string Amount { get; set; }
}

下面是我用来读取数据的方法的片段

public List<Invoice> ParseRecords(Stream stream)
    {
        List<Invoice> invoices = new List<Invoice>();

        try
        {
            stream.Position = 0;
            XmlSerializer serializer = new XmlSerializer(typeof(List<Invoice>));
            invoices = (List<Invoice>)serializer.Deserialize(stream);
        }
        catch (Exception ex)
        {
            log.Error(ex);
        }

        return invoices;
    }

XML 数据包含带有名为 "invoices" 的根标记的发票和带有标记 "invoice" 的多个子记录。没有为根元素定义命名空间，并且无法完成，因为 XML 数据是从外部源接收的。 XML 数据格式正确。我面临的问题是，当执行 Deserialize() 方法时，它抛出一个异常说 XML 文档 (2, 2) 中存在错误。并且内部异常显示{“不是预期的。”}

谁能帮我弄清楚这里出了什么问题？

Answer 1

实现您期望的结果的一种方法如下所示

[XmlRoot(ElementName = "invoices")]
public class Invoices
{
    [XmlElement(ElementName = "invoice")]
    public List<Invoice> Invoice { get; set; }
}

    [XmlRoot("invoice")]
public class Invoice
{
    [XmlElement(ElementName = "description", IsNullable = true)]
    public string Description { get; set; }

    [XmlElement(ElementName = "invoice_date")]
    public string InvoiceDate { get; set; }

    [XmlElement(ElementName = "invoice_number")]
    public string InvoiceNumber { get; set; }

    [XmlElement(ElementName = "date_due")]
    public string DateDue { get; set; }

    [XmlElement(ElementName = "amount")]
    public string Amount { get; set; }
}

你的解析记录函数应该像下面这样

public Invoices ParseRecords(Stream stream)
{
    Invoices invoices;

    try
    {
        stream.Position = 0;
        XmlSerializer serializer = new XmlSerializer(typeof(Invoices);
        invoices = (Invoices)serializer.Deserialize(stream);
    }
    catch (Exception ex)
    {
        log.Error(ex);
    }

    return invoices;
}

Answer 2

数据中有一些不可见的代码（看起来像白色space），可能是编码引起的。

反序列化 XML 从流到 List<T>

Deserializing XML from stream to List<T>

c#

xml

xml-parsing

xml-deserialization