public static void WriteDeltaFeed(ODataDeltaWriter deltaWriter, List<ODataItem> items, bool? countOption, Uri newDeltaLink)
{
var deltaFeed = new ODataDeltaFeed
{
DeltaLink = newDeltaLink
};
if (countOption == true)
{
deltaFeed.Count = items.Cast<object>().Count();
}
deltaWriter.WriteStart(deltaFeed);
foreach (ODataItem item in items)
{
var entry = item as ODataEntry;
var deletedEntry = item as ODataDeltaDeletedEntry;
var deltaLink = item as ODataDeltaLink;
var deltaDeletedLink = item as ODataDeltaDeletedLink;
if (entry != null)
{
deltaWriter.WriteStart(entry);
deltaWriter.WriteEnd();
}
else if (deletedEntry != null)
{
deltaWriter.WriteDeltaDeletedEntry(deletedEntry);
}
else if (deltaLink != null)
{
deltaWriter.WriteDeltaLink(deltaLink);
}
else if (deltaDeletedLink != null)
{
deltaWriter.WriteDeltaDeletedLink(deltaDeletedLink);
}
}
deltaWriter.WriteEnd();
}
/// <summary>
/// Writes the given deltaLink specified by the parameter graph as a part of an existing OData message using the given
/// messageWriter and the writeContext.
/// </summary>
/// <param name="graph">The object to be written.</param>
/// <param name="writer">The <see cref="ODataDeltaWriter" /> to be used for writing.</param>
/// <param name="writeContext">The <see cref="ODataSerializerContext"/>.</param>
public virtual void WriteDeltaLink(object graph, ODataDeltaWriter writer, ODataSerializerContext writeContext)
{
EdmDeltaLink edmDeltaLink = graph as EdmDeltaLink;
if (edmDeltaLink == null)
{
throw new SerializationException(Error.Format(SRResources.CannotWriteType, GetType().Name, graph.GetType().FullName));
}
ODataDeltaLink deltaLink = new ODataDeltaLink(
edmDeltaLink.Source,
edmDeltaLink.Target,
edmDeltaLink.Relationship);
if (deltaLink != null)
{
writer.WriteDeltaLink(deltaLink);
}
}
