如何反序列化XML文档

我如何反序列化这个XML文档:

<?xml version="1.0" encoding="utf-8"?>
<Cars>
  <Car>
    <StockNumber>1020</StockNumber>
    <Make>Nissan</Make>
    <Model>Sentra</Model>
  </Car>
  <Car>
    <StockNumber>1010</StockNumber>
    <Make>Toyota</Make>
    <Model>Corolla</Model>
  </Car>
  <Car>
    <StockNumber>1111</StockNumber>
    <Make>Honda</Make>
    <Model>Accord</Model>
  </Car>
</Cars>

我有这个:

[Serializable()]
public class Car
{
    [System.Xml.Serialization.XmlElementAttribute("StockNumber")]
    public string StockNumber{ get; set; }

    [System.Xml.Serialization.XmlElementAttribute("Make")]
    public string Make{ get; set; }

    [System.Xml.Serialization.XmlElementAttribute("Model")]
    public string Model{ get; set; }
}

[System.Xml.Serialization.XmlRootAttribute("Cars", Namespace = "", IsNullable = false)]
public class Cars
{
    [XmlArrayItem(typeof(Car))]
    public Car[] Car { get; set; }

}

public class CarSerializer
{
    public Cars Deserialize()
    {
        Cars[] cars = null;
        string path = HttpContext.Current.ApplicationInstance.Server.MapPath("~/App_Data/") + "cars.xml";

        XmlSerializer serializer = new XmlSerializer(typeof(Cars[]));

        StreamReader reader = new StreamReader(path);
        reader.ReadToEnd();
        cars = (Cars[])serializer.Deserialize(reader);
        reader.Close();

        return cars;
    }
}

那似乎不起作用:-(


这是一个工作版本。 我将XmlElementAttribute标签更改为XmlElement,因为在xml中StockNumber,Make和Model值是元素,而不是属性。 我也删除了reader.ReadToEnd(); (该函数读取整个流并返回一个字符串,因此Deserialze()函数不能再使用阅读器了......位置在流的末尾)。 我也采取了一些自由与命名:)。

这里是类:

[Serializable()]
public class Car
{
    [System.Xml.Serialization.XmlElement("StockNumber")]
    public string StockNumber { get; set; }

    [System.Xml.Serialization.XmlElement("Make")]
    public string Make { get; set; }

    [System.Xml.Serialization.XmlElement("Model")]
    public string Model { get; set; }
}


[Serializable()]
[System.Xml.Serialization.XmlRoot("CarCollection")]
public class CarCollection
{
    [XmlArray("Cars")]
    [XmlArrayItem("Car", typeof(Car))]
    public Car[] Car { get; set; }
}

反序列化功能:

CarCollection cars = null;
string path = "cars.xml";

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

StreamReader reader = new StreamReader(path);
cars = (CarCollection)serializer.Deserialize(reader);
reader.Close();

稍微调整的xml(我需要添加一个新元素来包装<Cars> ... Net对反序列化数组有挑剔):

<?xml version="1.0" encoding="utf-8"?>
<CarCollection>
<Cars>
  <Car>
    <StockNumber>1020</StockNumber>
    <Make>Nissan</Make>
    <Model>Sentra</Model>
  </Car>
  <Car>
    <StockNumber>1010</StockNumber>
    <Make>Toyota</Make>
    <Model>Corolla</Model>
  </Car>
  <Car>
    <StockNumber>1111</StockNumber>
    <Make>Honda</Make>
    <Model>Accord</Model>
  </Car>
</Cars>
</CarCollection>

你如何将xml保存到一个文件中,并使用xsd?

  • 将文件写入磁盘(我将其命名为foo.xml)
  • 生成xsd: xsd foo.xml
  • 生成C#: xsd foo.xsd /classes
  • Et voila - 以及应该能够通过XmlSerializer读取数据的C#代码文件:

        XmlSerializer ser = new XmlSerializer(typeof(Cars));
        Cars cars;
        using (XmlReader reader = XmlReader.Create(path))
        {
            cars = (Cars) ser.Deserialize(reader);
        }
    

    (在项目中包含生成的foo.cs)


    你有两种可能性。

    方法1. XSD工具


    假设您的XML文件位于此位置C:pathtoxmlfile.xml

  • 打开开发人员命令提示符
    您可以在Start Menu > Programs > Microsoft Visual Studio 2012 > Visual Studio Tools找到它或者如果您有Windows 8,只需在开始屏幕中输入Developer Command Prompt
  • 通过输入cd /D "C:pathtoxml"位置更改为XML文件目录
  • 通过输入xsd file.xml从xml文件创建XSD文件
  • 通过输入xsd /c file.xsd创建C#类
  • 就是这样! 您已经从C:pathtoxmlfile.cs xml文件生成C#类C:pathtoxmlfile.cs

    方法2 - 特殊粘贴


    必需的Visual Studio 2012+

  • 将XML文件的内容复制到剪贴板
  • 添加到您的解决方案新的空类文件(Shift + Alt + C)
  • 打开该文件,然后在菜单中单击Edit > Paste special > Paste XML As Classes
    在这里输入图像描述
  • 就是这样!

    用法


    这个辅助类的用法非常简单:

    using System;
    using System.IO;
    using System.Web.Script.Serialization; // Add reference: System.Web.Extensions
    using System.Xml;
    using System.Xml.Serialization;
    
    namespace Helpers
    {
        internal static class ParseHelpers
        {
            private static JavaScriptSerializer json;
            private static JavaScriptSerializer JSON { get { return json ?? (json = new JavaScriptSerializer()); } }
    
            public static Stream ToStream(this string @this)
            {
                var stream = new MemoryStream();
                var writer = new StreamWriter(stream);
                writer.Write(@this);
                writer.Flush();
                stream.Position = 0;
                return stream;
            }
    
    
            public static T ParseXML<T>(this string @this) where T : class
            {
                var reader = XmlReader.Create(@this.Trim().ToStream(), new XmlReaderSettings() { ConformanceLevel = ConformanceLevel.Document });
                return new XmlSerializer(typeof(T)).Deserialize(reader) as T;
            }
    
            public static T ParseJSON<T>(this string @this) where T : class
            {
                return JSON.Deserialize<T>(@this.Trim());
            }
        }
    }
    

    你现在要做的就是:

        public class JSONRoot
        {
            public catalog catalog { get; set; }
        }
        // ...
    
        string xml = File.ReadAllText(@"D:file.xml");
        var catalog1 = xml.ParseXML<catalog>();
    
        string json = File.ReadAllText(@"D:file.json");
        var catalog2 = json.ParseJSON<JSONRoot>();
    
    链接地址: http://www.djcxy.com/p/65997.html

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