I am using DataContractJsonSerializer
to serialize my custom object to JSON. But i want to skip the data members whose values are null
. If DataMember
is null
that node should not come in JSON string.
How can I achieve this? Give me a simple code snippet
to work with.
You can use the EmitDefaultValue = false
property in the [DataMember]
attribute. For members marked with that attribute, their values will not be output.
[DataContract]
public class MyType
{
[DataMember(EmitDefaultValue = false)]
public string Prop1 { get; set; }
[DataMember(EmitDefaultValue = false)]
public string Prop2 { get; set; }
[DataMember(EmitDefaultValue = false)]
public string Prop3 { get; set; }
}
public class Test
{
public static void Main()
{
var dcjs = new DataContractJsonSerializer(typeof(MyType));
var ms = new MemoryStream();
var data = new MyType { Prop2 = "Hello" };
dcjs.WriteObject(ms, data);
// This will write {"Prop2":"Hello"}
Console.WriteLine(Encoding.UTF8.GetString(ms.ToArray()));
}
}