public static void OverrideReadOnAttribute()
{
JsonSerializerOptions options = new JsonSerializerOptions();
JsonPropertyValueAttribute attr = new JsonPropertyValueAttribute();
attr.IgnoreNullValueOnRead = true;
options.AddAttribute(typeof(TestClassWithNullButInitialized), attr);
TestClassWithNullButInitialized obj = JsonSerializer.Parse <TestClassWithNullButInitialized>(TestClassWithNullButInitialized.s_json, options);
Assert.Equal("Hello", obj.MyString);
Assert.Equal(1, obj.MyInt);
}
public static void OverrideWriteOnAttribute()
{
JsonSerializerOptions options = new JsonSerializerOptions();
JsonPropertyValueAttribute attr = new JsonPropertyValueAttribute();
attr.IgnoreNullValueOnWrite = true;
options.AddAttribute(typeof(TestClassWithNull), attr);
var input = new TestClassWithNull();
string json = JsonSerializer.ToString(input, options);
Assert.Equal(@"{}", json);
}
public static TValue GetPropertyClassAssemblyPolicy <TValue>(
Type parentClassType,
PropertyInfo propertyInfo,
JsonSerializerOptions options,
Func <JsonPropertyValueAttribute, TValue> selector)
{
TValue value;
JsonPropertyValueAttribute attr = null;
if (propertyInfo != null)
{
// Use Property first
attr = options.GetAttributes <JsonPropertyValueAttribute>(propertyInfo).FirstOrDefault();
}
if (attr == null || (value = selector(attr)) == default)
{
// Then class type
attr = options.GetAttributes <JsonPropertyValueAttribute>(parentClassType, inherit: true).FirstOrDefault();
if (attr == null || (value = selector(attr)) == default)
{
// Then declaring assembly
attr = options.GetAttributes <JsonPropertyValueAttribute>(parentClassType.Assembly).FirstOrDefault();
if (attr == null || (value = selector(attr)) == default)
{
// Then global
attr = options.GetAttributes <JsonPropertyValueAttribute>(JsonSerializerOptions.GlobalAttributesProvider).FirstOrDefault();
if (attr == null)
{
value = default;
}
else
{
value = selector(attr);
}
}
}
}
return(value);
}
