private Stream ProcessDelete()
{
if (!this.IsAllowDelete())
{
throw new ODataServiceException(HttpStatusCode.BadRequest, "The delete request is not allowed.", null);
}
try
{
using (DeletionContext.Create())
{
// handle entity
var entity = this.HandleEntity();
// handle ETag
this.HandleETag(entity, false);
// delete stream
this.DataSource.StreamProvider.DeleteStream(entity);
// delete entity
this.DataSource.UpdateProvider.Delete(entity);
this.DataSource.UpdateProvider.SaveChanges();
return(this.HandleResponse(entity, HttpStatusCode.NoContent, false, false));
}
}
catch (Exception)
{
this.DataSource.UpdateProvider.ClearChanges();
throw;
}
}
public override void Process(IODataRequestMessage requestMessage, IODataResponseMessage responseMessage)
{
if (!this.IsAllowDelete())
{
throw new ODataServiceException(HttpStatusCode.BadRequest, "The delete request is not allowed.", null);
}
if (this.QueryContext.QueryPath.LastSegment is NavigationPropertyLinkSegment)
{
this.ProcessDeleteLink(responseMessage);
return;
}
try
{
using (DeletionContext.Create())
{
var targetObject = this.QueryContext.ResolveQuery(this.DataSource);
if (targetObject == null)
{
throw Utility.BuildException(HttpStatusCode.NotFound);
}
var targetETag = Utility.GetETagValue(targetObject);
if (targetETag != null)
{
string requestETag;
if (Utility.TryGetIfMatch(this.RequestHeaders, out requestETag))
{
if (requestETag == ServiceConstants.ETagValueAsterisk || requestETag == targetETag)
{
ProcessDelete(targetObject, responseMessage);
}
else
{
ProcessPreconditionFailed(responseMessage);
}
}
else if (Utility.TryGetIfNoneMatch(this.RequestHeaders, out requestETag))
{
if (requestETag == ServiceConstants.ETagValueAsterisk || requestETag == targetETag)
{
ProcessPreconditionFailed(responseMessage);
}
else
{
ProcessDelete(targetObject, responseMessage);
}
}
else
{
ProcessPreconditionRequired(responseMessage);
}
}
else
{
ProcessDelete(targetObject, responseMessage);
}
this.DataSource.UpdateProvider.SaveChanges();
}
}
catch
{
this.DataSource.UpdateProvider.ClearChanges();
throw;
}
}
