关于使用XmlSerializer 序列化和反序列化的问题?

Posted

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了关于使用XmlSerializer 序列化和反序列化的问题?相关的知识,希望对你有一定的参考价值。

aspx页面上有MagnetPullStrength,MagnetGrade,VisibleCustomerID三个textbox控件,现在需要将这三个框内的值以XML序列化存入到product表内ExtensionData这一列内(原话the data must be serialized into XML and stored only in the one column named ExtensionData.),并且读取的时候也要用反序列化来读取。

可是在msdn上看了还是不太明白要怎么弄
http://msdn.microsoft.com/zh-cn/library/system.xml.serialization.xmlserializer.aspx

要求的存入数据库的格式大概是这样
<ExtensionData>
<MagnetPullStrength>123
</MagnetPullStrength>
<MagnetGrade>23
<MagnetGrade>
<VisibleCustomerID>12,22,21,34,54,58639
</VisibleCustomerID>
</ExtensionData>

求助各位大大帮忙指点下 最好有代码例子 谢谢了
必须要用到XmlSerializer这个类

[XmlRootAttribute("Extensiondata", IsNullable = false)]
public class Extensiondata

public string MagnetPullStrength;
public string MagnetGrade;
public string VisibleCustomerID;


XmlSerializer serializer = new XmlSerializer(typeof(Extensiondata));
TextWriter writer = new StreamWriter(CommonLogic.SafeMapPath("images\\po.xml"));

Extensiondata po = new Extensiondata();

po.MagnetPullStrength = TextBox1.Text;
po.MagnetGrade = TextBox2.Text;
po.VisibleCustomerID = TextBox3.Text;

serializer.Serialize(writer, po);

writer.Close();
参考技术A 建一个类
[XmlRoot("ExtensionData")]
class ExtensionData
[XmlElement("MagnetPullStrength")]
public int MagnetPullStrength get; set;

[XmlElement("MagnetGrade")]
public int MagnetGrade get; set;

[XmlElement("VisibleCustomerID")]
public string VisibleCustomerID get; set;

C# XML序列化和反序列化(XmlSerializer)

概述

     XML序列化和反序列化是C#的常用技术,实现的方式有很多种,序列化即将对象转化为便于传输的数据格式, 常见的方法有:二进制,字节数组,json字符串,xml字符串等。今天主要通过XmlSerializer类的Serialize和Deserialize方法实现.

标注

     如果使用XmlSerializer类实现序列化,不需要用[Serializable]属性标记对象的类型。如果用DataContractSerializer序列化对象,则需要标注[Serializable]或[DataContract]。

需要序列化的类型前标注 [XmlRoot("Name")],表示根节点;

[XmlType(TypeName = "Name")] 节点

[XmlElement("Name")] 元素

[XmlAttribute("Name")] 属性

[XmlArray] 声明集合

详见:微软官网:https://learn.microsoft.com/zh-cn/dotnet/standard/serialization/attributes-that-control-xml-serialization

Mark:

1. 私有属性不会被序列化;

2. 标注为[XmlIgnore]的共有属性也不会被序列化;

3. 枚举类型的属性序列化之前需要赋值

实例

using Caliburn.Micro.Hello.Helper;
using Caliburn.Micro.Hello.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;


namespace Caliburn.Micro.Hello.ViewModels

    public class XmlSerializerViewModel : Screen, IViewModel
    
        private StringBuilder stringBuilder = new StringBuilder();
        public string DisplayInfo  get; set; 
        public XmlSerializerViewModel()
        
            DisplayName = "XmlSerializer";


            xmlFile();
            SerializeToXml();
            DeserializeXml();
            DisplayInfo = stringBuilder.ToString();
        


        public void xmlFile()
        
            XmlFile xmlFile = new XmlFile();
            xmlFile.CreateXmlFile("ReviewParams", "maxValue", "30");
        


        public void SerializeToXml()
        
            //测试序列化
            var xml = "";
            StudentList de = new StudentList();


            var person1 = new Student();
            person1.Name = "郭德纲";
            person1.Age = 58;
            person1.Sex = "男";


            var person2 = new Student();
            person2.Name = "洪金宝";
            person2.Age = 72;
            person2.Sex = "男";


            de.data = new List<Student>();
            de.data.Add(person1);
            de.data.Add(person2);


            xml = XmlHelper.serialize(de);
            stringBuilder.AppendLine(xml);


            //XmlHelper.SerializeToXml(de);
            XmlHelper.SerializeToXml(new DocumentDic());
        


        public void DeserializeXml()
        
            var content = File.ReadAllText(Environment.CurrentDirectory + @"\\myxml.xml");
            DocumentDic dee = XmlHelper.deserialize(content, typeof(DocumentDic)) as DocumentDic;
            if (dee != null)
            
                foreach (var item in dee.dataDic.Values)
                
                    stringBuilder.AppendLine(item.Name);
                
            
        


    

运行结果:

这里要注意的是  xtw.Formatting = Formatting.Indented;//可实现换行显示;Dictionary本身不支持序列化,所以需要重写为可序列化的SerializableDictionary;

SerializeToXml:

public static void SerializeToXml(object o)
        
            var type = o.GetType();
            if (o == null)
            
                return;
            


            //序列化对象
            XmlSerializer serializer = new XmlSerializer(type);
            using (XmlTextWriter xtw = new XmlTextWriter("myxml.xml", Encoding.UTF8)) //用XmlTextWriter 创建一个XML文件
            
                xtw.Formatting = Formatting.Indented;//可实现换行显示
                serializer.Serialize(xtw, o);
            ;
        

反序化xml为对象:

/// <summary>
        /// 反序化xml为对象
        /// </summary>
        /// <param name="xml"></param>
        /// <param name="type"></param>
        /// <returns></returns>
        public static object deserialize(string xml, Type type)
        
            try
            
                using (StringReader sr = new StringReader(xml))
                
                    XmlSerializer serializer = new XmlSerializer(type);
                    return serializer.Deserialize(sr);
                
            
            catch (Exception e)
            
                return null;
            
        

数据模型:

//对象定义
    [XmlRoot("RecipeData")]
    //[DataContract(Name = "RecipeData", Namespace = "DataContracts")]
    [Serializable]
    public class DocumentDic
    
        public DocumentDic()
        
            dataDic = new SerializableDictionary<string, Student>();
            var person = new Student();
            person.Name = "韦小宝";
            person.Age = 65;
            person.Sex = "男";


            dataDic.Add("明星", person);
        
        [XmlElement("DataTable")] //DataTable平行出现,不出现data
        //[XmlIgnore]
        //[DataMember(Name = "dataDic")]
        public SerializableDictionary<string, Student> dataDic  get; set; 
    


    //对象定义
    [XmlRoot("StudentList")]
    public class StudentList
    
        //[XmlArray("Students"), XmlArrayItem("Student")] 
        [XmlElement("Students")]
        public List<Student> data  get; set; 
    


    [XmlRoot("Student")]
    public class Student
    
        [XmlElement("Name")]
        public string Name  get; set; 


        [XmlElement("Age")]
        public int Age  get; set; 


        [XmlElement("Sex")]
        public string Sex  get; set; 


    

此外还可以用DataContractSerializer,

DataContractSerializer 与 XMLSerializer的区别:

① 需要序列化对象的所有公共和私有字段和属性,可以使用 DataContractSerializer 而不要使用 XML 序列化。

②DataContractSerializer 的性能优于 Xmlserializer。DataContractSerializer 序列化所有标记为 [DataMember] 属性的成员,即使成员标记为私有。一个类不同时使用[Serializable]和[DataContract]标签。

源码下载

链接:https://pan.baidu.com/s/1y1PqmsmHj-roDWv9Pou0LQ

提取码:6666

本文参考:如有侵权,请联系小编删除!

1. 【C# XML 序列化】开篇 - https://www.cnblogs.com/cdaniu/p/16093919.html

2. .NET中XML序列化和反序列化常用类和用来控制XML序列化的属性总结 - https://zhuanlan.zhihu.com/p/487914400

以上是关于关于使用XmlSerializer 序列化和反序列化的问题?的主要内容,如果未能解决你的问题,请参考以下文章

XmlSerializer c++ 使用多个命名空间反序列化

XmlSerializer(Type type, Type[] extraTypes) 内存泄漏

c#序列化和反序列化《转载》

C#语言中的XmlSerializer类的Serialize(Stream,Object)方法举例详解

C#关于序列化和反序列化

关于序列化和反序列化