Example #1
0
        /// <summary>
        /// Ends an asynchronous read operation.
        /// </summary><param name="result">
        /// An IAsyncResult that represents an asynchronous call started by
        /// BeginReadFinite.
        /// </param>
        protected override void EndReadFinite(IAsyncResult result)
        {
            try
            {
                AnalogWaveform <double>[] data = Reader.EndReadWaveform(result);

                ScopeTaskComponentReadCompletedEventArgs args = new ScopeTaskComponentReadCompletedEventArgs(data);
                RaiseGenericEventAsync(result, OnReadCompleted, args);
            }

            #region Debugger Exception Warnings
            catch (DaqException ex)
            {
                // If you Dispose the component while an asynchronous DAQ operation
                // is still running, the component may already be disposed or may be in the
                // process of disposing when this method is called.  Depending on timing, this situation
                // will result in one of the three errors below.  This is expected behavior.
                //
                // DaqExceptions are processed by the caller of this method in the
                // NationalInstruments.DAQmx.ComponentModel class library.  However, by default,
                // the Visual Studio debugger intercepts these exceptions and breaks
                // the debugger when they occur.
                //
                // Because these exceptions do not represent errors, they are caught and safely discarded
                // here.
                if (ex.Error != -200088 && ex.Error != -88709 && ex.Error != -88710)
                {
                    throw;
                }
            }
            #endregion
        }
Example #2
0
 /// <summary>
 /// Raises the ReadCompleted event.
 /// </summary><param name="e">
 /// The event arguments of the ReadCompleted event.
 /// </param>
 protected virtual void OnReadCompleted(ScopeTaskComponentReadCompletedEventArgs e)
 {
     RaiseGenericEventDirect(EventReadCompleted, e);
 }