OData 媒体类型格式化程序现在更具可扩展性。样品如下。
1) 决定提要的标题、作者和更新元素的内容
public class AtomMetadataFeedSerializer : ODataFeedSerializer
{
public AtomMetadataFeedSerializer(IEdmCollectionTypeReference edmType, ODataSerializerProvider serializerProvider)
: base(edmType, serializerProvider)
{
}
public override ODataFeed CreateODataFeed(IEnumerable feedInstance, ODataSerializerContext writeContext)
{
ODataFeed feed = base.CreateODataFeed(feedInstance, writeContext);
feed.Atom().Title = new AtomTextConstruct { Kind = AtomTextConstructKind.Text, Text = "My Awesome Feed" };
return feed;
}
}
public class CustomSerializerProvider : DefaultODataSerializerProvider
{
public override ODataEntrySerializer CreateEdmTypeSerializer(IEdmTypeReference edmType)
{
if (edmType.IsCollection() && edmType.AsCollection().ElementType().IsEntity())
{
// feed serializer
return new AtomMetadataFeedSerializer(edmType.AsCollection(), this);
}
return base.CreateEdmTypeSerializer(edmType);
}
}
并使用注册自定义序列化程序提供程序,
config.Formatters.InsertRange(0, ODataMediaTypeFormatters.Create(new CustomSerializerProvider(), new DefaultODataDeserializerProvider()));
2) 自定义编辑链接
public class CustomEntityTypeSerializer : ODataEntityTypeSerializer
{
public CustomEntityTypeSerializer(IEdmEntityTypeReference edmType, ODataSerializerProvider serializerProvider)
: base(edmType, serializerProvider)
{
}
public override ODataEntry CreateEntry(EntityInstanceContext entityInstanceContext, ODataSerializerContext writeContext)
{
ODataEntry entry = base.CreateEntry(entityInstanceContext, writeContext);
if (notProduceEditLinks)
{
entry.EditLink = null;
}
return entry;
}
}
public class CustomSerializerProvider : DefaultODataSerializerProvider
{
public override ODataEntrySerializer CreateEdmTypeSerializer(IEdmTypeReference edmType)
{
if (edmType.IsEntity())
{
// entity type serializer
return new CustomEntityTypeSerializer(edmType.AsEntity(), this);
}
return base.CreateEdmTypeSerializer(edmType);
}
}
并如上所述注册自定义序列化程序提供程序。
我们仍然不支持场景 3,即别名类型名称和命名空间。