NI-DAQmx .NET Framework 4.5 API Reference

CounterSingleChannelReader.BeginReadSingleSampleUInt32 Method

  • 更新时间2023-02-21
  • 阅读时长2分钟
CounterSingleChannelReader.BeginReadSingleSampleUInt32 Method
Begins an asynchronous read of a UInt32 sample from a counter task.

Namespace:  NationalInstruments.DAQmx
Assembly:  NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.45.49302

Syntax

public IAsyncResult BeginReadSingleSampleUInt32(
	AsyncCallback callback,
	Object state
)
Public Function BeginReadSingleSampleUInt32 ( 
	callback As AsyncCallback,
	state As Object
) As IAsyncResult

Parameters

callback
Type: SystemAsyncCallback
An optional asynchronous callback that is called when the read is complete. Specify if you do not want a callback when the read is complete.
state
Type: SystemObject
A user-provided object that distinguishes this asynchronous read request from other requests. Use this parameter to provide information to the callback. Specify if you do not need to pass any additional information to the callback.

Return Value

Type: IAsyncResult
An IAsyncResult that represents the asynchronous call.

Remarks

To get the read data or any exceptions that occurred during an asynchronous read initiated with BeginReadSingleSampleUInt32(AsyncCallback, Object), call EndReadSingleSampleUInt32(IAsyncResult) with the returned IAsyncResult.

Use this method when counter samples are returned unscaled, such as for event counting.

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.

Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.

Note Note
Refer to Asynchronous Reads and Writes for additional information.

See Also