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Xml字符串与C#对象之间相互转换

我们常常需要读取xml文件,把里面的信息转化为我们自定义的类型,或则吧自定义类型转化为Xml字符串。在这里介绍一个比较简单的对象转化方法。在我自己的Framwork里面也多次用到。里面涉及到节点、属性、集合。
示例一 该xml文件涉及到属性、节点集合不涉及个节点:
<?xml version="1.0" encoding="utf-8"?>
<databaseSettings defaultInstance="CheckboxSql">
  <databaseTypes>
    <databaseType name="sqlserver" type="Framework.Data.Sql.SqlDatabase,Framework" />
  </databaseTypes>
  <instances>
    <instance name="CheckboxSql" type="sqlserver" connectionString="DefaultConnectionString" />
    <instance name="TestProvider" type="sqlserver" connectionString="TestConnectionString" />
    <instance name="DBAuthenticationProvider" type="sqlserver" connectionString="FrameworkConnectionString" />
    <instance name="DBProfileProvider" type="sqlserver" connectionString="TestConnectionString" />
  </instances>
</databaseSettings>
自定相关类
[XmlRoot("databaseType", Namespace = "")]
public class DatabaseTypeData
{
    // Fields
    private string name;
    private string typeName;
    // Properties
    [XmlAttribute("name")]
    public string Name
    {
        get
        { return this.name; }
        set
        { this.name = value; }
    }
    [XmlAttribute("type")]
    public string TypeName
    {
        get
        { return this.typeName; }
        set
        {


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