Application Insights Blog - ApplicationInsightsNotFoundFilter.cs

ApplicationInsightsNotFoundFilter.cs

public class NotFoundFilter : ITelemetryProcessor
{
    private ITelemetryProcessor Next { get; set; }

    public NotFoundFilter(ITelemetryProcessor next)
    {
        this.Next = next;
    }

    public void Process(ITelemetry item)
    {
        var request = item as RequestTelemetry;

        if (request != null &&
        request.ResponseCode.Equals(((int)HttpStatusCode.NotFound).ToString(), StringComparison.OrdinalIgnoreCase))
        {
            // To filter out an item, just terminate the chain:
            return;
        }
        // Send everything else:
        this.Next.Process(item);
    }
}