使用.net 3.5的DataContractJsonSerializer进行JSON Serializati

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 { public Person() { } public Person(string firstname,string lastname) { this.FirstName = firstname; this.LastName = lastname; } public string FirstName { get; set; } public string LastName { get; set; } }

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

下面的代码是实现Person的serialize。

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

（编辑：李大同）

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