NewtonSoft add JSONIGNORE at runTime
Based on @Underscore post above, I created a list of properties to exclude on serialization.
public class DynamicContractResolver : DefaultContractResolver {
private readonly string[] props;
public DynamicContractResolver(params string[] prop) {
this.props = prop;
}
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization) {
IList<JsonProperty> retval = base.CreateProperties(type, memberSerialization);
// return all the properties which are not in the ignore list
retval = retval.Where(p => !this.props.Contains(p.PropertyName)).ToList();
return retval;
}
}
Use:
string json = JsonConvert.SerializeObject(car, Formatting.Indented,
new JsonSerializerSettings { ContractResolver = new DynamicContractResolver("ID", "CreatedAt", "LastModified") });
No need to do the complicated stuff explained in the other answer.
NewtonSoft JSON has a built-in feature for that:
public bool ShouldSerializeINSERT_YOUR_PROPERTY_NAME_HERE()
{
if(someCondition){
return true;
}else{
return false;
}
}
It is called "conditional property serialization" and the documentation can be found here.
Warning: first of all, it is important to get rid of [JsonIgnore]
above your {get;set;}
property. Otherwise it will overwrite the ShouldSerializeXYZ
behavior.
I think it would be best to use a custom IContractResolver to achieve this:
public class DynamicContractResolver : DefaultContractResolver
{
private readonly string _propertyNameToExclude;
public DynamicContractResolver(string propertyNameToExclude)
{
_propertyNameToExclude = propertyNameToExclude;
}
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
{
IList<JsonProperty> properties = base.CreateProperties(type, memberSerialization);
// only serializer properties that are not named after the specified property.
properties =
properties.Where(p => string.Compare(p.PropertyName, _propertyNameToExclude, true) != 0).ToList();
return properties;
}
}
The LINQ may not be correct, I haven't had a chance to test this. You can then use it as follows:
string json = JsonConvert.SerializeObject(car, Formatting.Indented,
new JsonSerializerSettings { ContractResolver = new DynamicContractResolver("LastModified") });
Refer to the documentation for more information.