/// <summary>
/// </summary>
///
/// <returns>
/// </returns>
///
/// <remarks>
/// This method accesses the HealthVault service across the network.
/// If the filters specified do not reduce the amount of data being retrieved from the
/// record, this method could take a significant amount of time as data gets paged into
/// memory from HealthVault.
///
/// Note: There may be data in items that HealthVault does not include when converting
/// to the CCR or CCD formats.
/// </remarks>
///
/// <exception cref="HealthServiceException">
/// The response from the server was anything but
/// <see cref="HealthServiceStatusCode.Ok"/>.
/// -or-
/// <see cref="Microsoft.Health.HealthRecordSearcher.Filters"/> is empty
/// or contains invalid filters.
/// </exception>
///
public string ExportItems()
{
HealthRecordSearcher searcher = new HealthRecordSearcher(_record);
for (int index = 0; index < Filters.Count; ++index)
{
searcher.Filters.Add(Filters[index]);
}
ReadOnlyCollection<HealthRecordItemCollection> results = searcher.GetMatchingItems();
StringBuilder resultXml = new StringBuilder(1000);
XmlWriterSettings settings = SDKHelper.XmlUnicodeWriterSettings;
settings.ConformanceLevel = ConformanceLevel.Document;
using (XmlWriter writer = XmlWriter.Create(resultXml, settings))
{
// <response>
writer.WriteStartElement("response");
// <wc:info>
writer.WriteStartElement("wc", "info", "urn:com.microsoft.wc.methods.response.GetThings3");
foreach (HealthRecordItemCollection items in results)
{
// <group>
writer.WriteStartElement("group");
// We are leveraging the HealthRecordItemCollection paging here to retrieve
// all the data from HealthVault if it doesn't come with the first request.
for (int itemIndex = 0; itemIndex < items.Count; ++itemIndex)
{
bool filterApproved = true;
foreach (HealthRecordClientFilterHandler filter in ClientFilters)
{
filterApproved = filter(items[itemIndex]);
if (!filterApproved)
{
break;
}
}
if (filterApproved)
{
items[itemIndex].WriteItemXml(writer, true, "thing");
}
}
// </group>
writer.WriteEndElement();
}
// </wc:info>
writer.WriteEndElement();
// </response>
writer.WriteEndElement();
writer.Flush();
writer.Close();
}
return TransformItemXml(resultXml.ToString());
}
