学步园

 可能你看到这个东东的时候还不理解它是什么，但是如果在.net之前的版本你用过JavaScriptSerializer方法的话,应该就明白了,它在.net 3.5中取代了JavaScriptSerialize进行JSON的serialization和deserialization功能。

这里举个例子来看,创建一个对象是Person它有FirstName和LastName属性。

public class Person<br /> {<br /> public Person() { }<br /> public Person(string firstname, string lastname)<br /> {<br /> this.FirstName = firstname;<br /> this.LastName = lastname;<br /> }<br /> public string FirstName { get; set; }<br /> public string LastName { get; set; }<br /> } </p> <p>

现在,为了能够让我们的对象通过使用DataContractJsonSerializer转化为JSON,我们需要让为它加上Serializable或者是DataContract属性。

public class Person<br /> {<br /> public Person() { }<br /> public Person(string firstname, string lastname)<br /> {<br /> this.FirstName = firstname;<br /> this.LastName = lastname;<br /> }<br /> public string FirstName { get; set; }<br /> public string LastName { get; set; }</p> <p>}</p> <p>/// Marked with the DataContact Attribute<br /> [DataContract]<br /> public class Person<br /> {<br /> public Person() { }<br /> public Person(string firstname, string lastname)<br /> {<br /> this.FirstName = firstname;<br /> this.LastName = lastname;<br /> }</p> <p> [DataMember]<br /> public string FirstName { get; set; }</p> <p> [DataMember]<br /> public string LastName { get; set; }<br /> }<br />

下面的代码是实现Person的serialize。

Person myPerson = new Person("Chris", "Pietschmann");</p> <p>/// Serialize to JSON<br /> System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(myPerson.GetType());<br /> MemoryStream ms = new MemoryStream();<br /> serializer.WriteObject(ms, myPerson);<br /> string json = Encoding.Default.GetString(ms.ToArray()); </p> <p>

如果我们使用的Person对象添加了Serializable属性,那么序列化后的结果如下：

/// Result of Person class marked as Serializable
{"<FirstName>k__BackingField":"Chris","<LastName>k__BackingField":"Pietschmann"}

如果是DataContract属性最后结果为:

/// Result of Person class marked as DataContract with
/// each Property marked as DataMember

{"FirstName":"Chris","LastName":"Pietschmann"}

今天做个东西需要用到json序列化,正好用到这个东西。 不过熟悉generics的话,使用了generics的帮忙让序列化和反序列化都那么容易了。

贴出他的代码,希望大家能够看懂:

using System.Runtime.Serialization;<br /> using System.Runtime.Serialization.Json;</p> <p>public class JSONHelper<br /> {<br /> public static string Serialize<T>(T obj)<br /> {<br /> System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());<br /> MemoryStream ms = new MemoryStream();<br /> serializer.WriteObject(ms, obj);<br /> string retVal = Encoding.Default.GetString(ms.ToArray());<br /> return retVal;<br /> }</p> <p> public static T Deserialize<T>(string json)<br /> {<br /> T obj = Activator.CreateInstance<T>();<br /> MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json));<br /> System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());<br /> obj = (T)serializer.ReadObject(ms);<br /> ms.Close();<br /> return obj;<br /> }<br /> }</p> <p>/// Our Person object to Serialize/Deserialize to JSON<br /> [DataContract]<br /> public class Person<br /> {<br /> public Person() { }<br /> public Person(string firstname, string lastname)<br /> {<br /> this.FirstName = firstname;<br /> this.LastName = lastname;<br /> }</p> <p> [DataMember]<br /> public string FirstName { get; set; }</p> <p> [DataMember]<br /> public string LastName { get; set; }<br /> }</p> <p>/// Sample code using the above helper methods<br /> /// to serialize and deserialize the Person object</p> <p>Person myPerson = new Person("Chris", "Pietschmann");</p> <p>// Serialize<br /> string json = JSONHelper.Serialize<Person>(myPerson);</p> <p>// Deserialize<br /> myPerson = JSONHelper.Deserialize<Person>(json); </p> <p>

我觉得他挺牛。。。。崇拜中。。。