自定义类转化为JSON数据

[wish907]

public void MenuJSON()//菜单创建转换Json测试
{
ClickButton btn1 = new ClickButton();
btn1.setName("今日歌曲");
btn1.setType("click");
btn1.setKey("V1001_TODAY_MUSIC");

ViewButton btn2 = new ViewButton();
btn2.setName("歌手简介");
btn2.setType("view");
btn2.setUrl("http://www.qq.com/");

ClickButton btn31 = new ClickButton();
btn31.setName("hello world");
btn31.setType("click");
btn31.setKey("V1001_HELLO_WORLD");

ClickButton btn32 = new ClickButton();
btn32.setName("赞一下");
btn32.setType("click");
btn32.setKey("V1001_GOOD");

ComplexButton btn3 = new ComplexButton();
btn3.setName("菜单");
btn3.setSub_button(new BaseButton[] { btn31, btn32 });

MenuButton menu = new MenuButton();
menu.setBaseButton(new BaseButton[] { btn1, btn2, btn3 });

try
{
string s=ClassToJson(btn3);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}

}
public string ClassToJson(object ob)
{
var serializer = new DataContractJsonSerializer(typeof(ComplexButton));
var stream = new MemoryStream();
serializer.WriteObject(stream, ob);

byte[] dataBytes = new byte[stream.Length];

stream.Position = 0;

stream.Read(dataBytes, 0, (int)stream.Length);

string dataString = Encoding.UTF8.GetString(dataBytes);
return dataString;
}

好吧，这是微信的一个菜单消息转化为JSON，如果只是最简单的按钮可以转化为JSON
当使用复合按钮类，
[DataContract(Namespace = "http://coderzh.cnblogs.com")]//数据契约
public class ComplexButton:BaseButton//复合菜单
{
[DataMember(Order = 0)]//数据成员
private BaseButton[] Sub_button;
public BaseButton[] getSub_button()
{
return Sub_button;
}
public void setSub_button(BaseButton[] sub_button)
{
Sub_button = sub_button;
}
}
就会报错了，求指导

[yixian2007]

没仔细看，不过你不把返回的值输出出来看下吗？看看json对不对，我觉得和json没关系，纯粹是你拼字符串的问题。

[wish907]

找到错误了，需要在基类加一个KnownType，哎没人回复就只有你