给出以下XML:
<?xml version="1.0"?>
<user_list>
<user>
<id>1</id>
<name>Joe</name>
</user>
<user>
<id>2</id>
<name>John</name>
</user>
</user_list>
以下课程:
public class User {
[XmlElement("id")]
public Int32 Id { get; set; }
[XmlElement("name")]
public String Name { get; set; }
}
是否可以使用XmlSerializer
将xml反序列化为List<User>
?如果是这样,我需要使用哪种类型的附加属性,或者我需要使用哪些其他参数来构建XmlSerializer
实例?
如果不太优选,可以接受数组(User[]
)。
答案 0 :(得分:130)
您可以封装列表:
using System;
using System.Collections.Generic;
using System.Xml.Serialization;
[XmlRoot("user_list")]
public class UserList
{
public UserList() {Items = new List<User>();}
[XmlElement("user")]
public List<User> Items {get;set;}
}
public class User
{
[XmlElement("id")]
public Int32 Id { get; set; }
[XmlElement("name")]
public String Name { get; set; }
}
static class Program
{
static void Main()
{
XmlSerializer ser= new XmlSerializer(typeof(UserList));
UserList list = new UserList();
list.Items.Add(new User { Id = 1, Name = "abc"});
list.Items.Add(new User { Id = 2, Name = "def"});
list.Items.Add(new User { Id = 3, Name = "ghi"});
ser.Serialize(Console.Out, list);
}
}
答案 1 :(得分:41)
如果您使用User
装饰XmlType
课程以匹配所需的大写字母:
[XmlType("user")]
public class User
{
...
}
然后XmlRootAttribute
ctor上的XmlSerializer
可以提供所需的根,并允许直接读入List&lt;&gt;:
// e.g. my test to create a file
using (var writer = new FileStream("users.xml", FileMode.Create))
{
XmlSerializer ser = new XmlSerializer(typeof(List<User>),
new XmlRootAttribute("user_list"));
List<User> list = new List<User>();
list.Add(new User { Id = 1, Name = "Joe" });
list.Add(new User { Id = 2, Name = "John" });
list.Add(new User { Id = 3, Name = "June" });
ser.Serialize(writer, list);
}
...
// read file
List<User> users;
using (var reader = new StreamReader("users.xml"))
{
XmlSerializer deserializer = new XmlSerializer(typeof(List<User>),
new XmlRootAttribute("user_list"));
users = (List<User>)deserializer.Deserialize(reader);
}
答案 2 :(得分:16)
我想我找到了一个更好的方法。您不必将属性放入类中。我已经为序列化和反序列化制作了两种方法,它们将通用列表作为参数。
看看(对我有用):
private void SerializeParams<T>(XDocument doc, List<T> paramList)
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(paramList.GetType());
System.Xml.XmlWriter writer = doc.CreateWriter();
serializer.Serialize(writer, paramList);
writer.Close();
}
private List<T> DeserializeParams<T>(XDocument doc)
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(List<T>));
System.Xml.XmlReader reader = doc.CreateReader();
List<T> result = (List<T>)serializer.Deserialize(reader);
reader.Close();
return result;
}
所以你可以序列化你想要的任何列表!您不需要每次都指定列表类型。
List<AssemblyBO> list = new List<AssemblyBO>();
list.Add(new AssemblyBO());
list.Add(new AssemblyBO() { DisplayName = "Try", Identifier = "243242" });
XDocument doc = new XDocument();
SerializeParams<T>(doc, list);
List<AssemblyBO> newList = DeserializeParams<AssemblyBO>(doc);
答案 3 :(得分:15)
是的,它会序列化和反序列化List&lt;&gt;。如果有疑问,请确保使用[XmlArray]属性。
[Serializable]
public class A
{
[XmlArray]
public List<string> strings;
}
这适用于Serialize()和Deserialize()。
答案 4 :(得分:7)
是的,它确实反序列化为List&lt;&gt;。无需将其保留在数组中并将其封装/封装在列表中。
public class UserHolder
{
private List<User> users = null;
public UserHolder()
{
}
[XmlElement("user")]
public List<User> Users
{
get { return users; }
set { users = value; }
}
}
反序列化代码,
XmlSerializer xs = new XmlSerializer(typeof(UserHolder));
UserHolder uh = (UserHolder)xs.Deserialize(new StringReader(str));
答案 5 :(得分:4)
不确定List&lt; T&gt;但阵列当然可行。而一点点魔法使得再次进入List非常容易。
public class UserHolder {
[XmlElement("list")]
public User[] Users { get; set; }
[XmlIgnore]
public List<User> UserList { get { return new List<User>(Users); } }
}
答案 6 :(得分:2)
怎么样
XmlSerializer xs = new XmlSerializer(typeof(user[]));
using (Stream ins = File.Open(@"c:\some.xml", FileMode.Open))
foreach (user o in (user[])xs.Deserialize(ins))
userList.Add(o);
不是特别花哨,但它应该有效。