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JSON Serialize lost properties

  1. #1
    Feb 24, 2012, 9:37 AM

    JSON Serialize lost properties

    Hi all,

    I have an problem when serialize an object. JSON.Serialize<Type>(obj) return an incomplete object.
    Example:
    public class Class1
{
          public Class2 Obj2;

          public Class3 Obj3;
}

public class Class2
{
          public string Name;
}

public class Class3
{
          public string Name;

          public Class4 Obj4;
}

public class Class4
{
          public string Name;
}

var lst = new List<Class1>();

lst.Add(new Class1());

string str = JSON.Serialize(lst);
    In this example i lost Obj2 and Obj3.

    Thx in advanced.
  2. #2
    Feb 24, 2012, 2:22 PM
    Hi,

    I see all properties.

    Example
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    public class Class1
    {
        public Class2 Obj2;
        public Class3 Obj3;
    }
 
    public class Class2
    {
        public string Name;
    }
 
    public class Class3
    {
        public string Name;
        public Class4 Obj4;
    }
 
    public class Class4
    {
        public string Name;
    }
 
    protected void Page_Load(object sender, EventArgs e)
    {
        var lst = new List<Class1>();

        lst.Add(new Class1()
            {
                Obj2 = new Class2()
                {
                    Name = "Class2"
                },
                Obj3 = new Class3()
                {
                    Name = "Class3",
                    Obj4 = new Class4()
                    {
                        Name = "Class4"
                    }
                }
            });

        string str = JSON.Serialize(lst);

        X.Msg.Alert("JSON", str).Show();
    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Ext.NET Example</title>
</head>
<body>
    <ext:ResourceManager runat="server" />
</body>
</html>
  3. #3
    Feb 24, 2012, 3:13 PM
    Yes, I believe the "Class#" properties in the original sample are not Serialized by Json.NET because they have not been instantiated/created or set. The values do not exist.

    I think there's a way to work around this in Json.NET by using the DefaultValue Attribute, although you might have to manually call the Json.NET methods, instead of using the JSON.Serialize helpers provided by Ext.NET.
    Geoffrey McGill
    Founder
    Ext.NETASP.NET UI Component framework
    RetypeDocumentation website generator
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    Ext.NET Examples|Ext.NET API Docs|ExtJS API Docs|Twitter
  4. #4
    Feb 27, 2012, 4:04 PM
    Thx Daniill and geoffrey.

    The problem is:

    Class# is not serialized becouse the attributes [DataContract] and [DataMember] is missed .

    Solution:

    [DataContract]
    public class Class1
    {
        [DataMember]
        public Class2 Obj2;
        [DataMember]
        public Class3 Obj3;
    }
    [DataContract]
    public class Class2
    {
        [DataMember]
        public string Name;
    }
    [DataContract]
    public class Class3
    {
        [DataMember]
        public string Name;
        [DataMember]
        public Class4 Obj4;
    }
    [DataContract]
    public class Class4
    {
        [DataMember]
        public string Name;
    }
    Thx all again. I hope this help anyone too.
  5. #5
    Feb 27, 2012, 4:51 PM
    Thanks for the sharing your solution. It might really help someone on the forums in the future.
  6. #6
    Apr 17, 2012, 8:42 PM
    It did just help me, thanks!

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