AnalogSingleChannelReader.EndReadWaveform Method
- Updated2023-02-21
- 2 minute(s) read
AnalogSingleChannelReaderEndReadWaveform Method
Handles the end of an asynchronous read initiated with BeginReadWaveform(Int32, AsyncCallback, Object) and retrieves the read samples.
Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302
Syntax
public virtual AnalogWaveform<double> EndReadWaveform( IAsyncResult asyncResult )
Public Overridable Function EndReadWaveform ( asyncResult As IAsyncResult ) As AnalogWaveform(Of Double)
Parameters
- asyncResult
- Type: SystemIAsyncResult
An IAsyncResult that represents an asynchronous call started by calling BeginReadWaveform(Int32, AsyncCallback, Object).
Return Value
Type: AnalogWaveformDoubleAn AnalogWaveformTData containing samples from the task.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentException | asyncResult is or is not an instance of IAsyncResult returned from a call to BeginReadWaveform(Int32, AsyncCallback, Object). |
| DaqException | The NI-DAQmx driver returned an error during the asynchronous operation. |
| OutOfMemoryException | There is not enough memory to carry out this operation. |
Remarks
If you call EndReadWaveform(IAsyncResult) before the asynchronous read is complete, EndReadWaveform(IAsyncResult) waits for the read to complete before returning.
NI-DAQmx scales the returned data to the units of the measurement, including any custom scaling you apply to the channel. You specify these units with the create channel methods or the DAQ Assistant.
NI-DAQmx read and write methods time out after the amount of time specified by the Timeout property on the task you are reading from or writing to.
 Note |
|---|
| Refer to Asynchronous Reads and Writes for additional information. |