/// <summary>
/// Executes the <see cref="DataDeleteRequest{TEntity}" />.
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public override Message Execute(DataRequestParameters parameters)
{
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
if (Entities == null || !Entities.Any())
{
throw new ArgumentException("Could not execute request because no entities have been set.");
}
DataServiceContext serviceContext = Resolve(parameters);
foreach (TEntity entity in Entities)
{
if (!serviceContext.Entities.Contains(serviceContext.GetEntityDescriptor(entity)))
{
serviceContext.AttachTo(parameters.EntitySet, entity);
}
serviceContext.DeleteObject(entity);
}
serviceContext.SaveChanges();
return(null);
}
/// <summary>
/// Resolves a <see cref="DataServiceContext" /> based on the specified <see cref="DataRequestParameters" />.
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
protected DataServiceContext Resolve(DataRequestParameters parameters)
{
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
if (string.IsNullOrEmpty(parameters.BaseUrl))
{
throw new ArgumentException("BaseUrl has not been set.");
}
if (string.IsNullOrEmpty(parameters.EntitySet))
{
throw new ArgumentException("EntitySet has not been set.");
}
DataServiceContext dataServiceContext = new DataServiceContext(new Uri(parameters.Url),
DataServiceProtocolVersion.V3)
{
Credentials = CredentialCache.DefaultNetworkCredentials,
IgnoreResourceNotFoundException = true,
IgnoreMissingProperties = true,
ResolveEntitySet = x => new Uri(parameters.Url),
//ResolveName = x => entitySet,
SaveChangesDefaultOptions = SaveChangesOptions.ContinueOnError
};
IDictionary <string, string> headers = parameters.Headers;
if (headers != null && headers.Any())
{
dataServiceContext.SendingRequest2 += (sender, args) =>
{
foreach (string key in headers.Keys)
{
args.RequestMessage.SetHeader(key, headers[key]);
}
};
}
return(dataServiceContext);
}
/// <summary>
/// Executes the <see cref="DataGetRequest{TEntity}" />.
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public override Message Execute(DataRequestParameters parameters)
{
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
if (Query == null)
{
throw new ArgumentException("Could not execute request because no query has been set.");
}
DataServiceContext serviceContext = Resolve(parameters);
DataServiceQuery <TEntity> query = serviceContext.CreateQuery <TEntity>(parameters.EntitySet);
IEnumerable <TEntity> result = Query(query);
DataServiceQuery <TEntity> dataServiceQuery = result as DataServiceQuery <TEntity>;
IEnumerable <TEntity> entities = dataServiceQuery != null?dataServiceQuery.Execute() : result;
return(new DataResponse <IEnumerable <TEntity> > {
Result = entities
});
}
/// <summary> /// Executes the <see cref="DataRequest" /> using the specified <see cref="DataRequestParameters" />. /// </summary> /// <param name="parameters"></param> /// <returns></returns> public abstract Message Execute(DataRequestParameters parameters);
