NI-DAQmx .NET Framework 4.0 API Reference

AnalogUnscaledReader.BeginReadUInt32 Method

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Updated2023-02-21
2 minute(s) read

Begins an asynchronous read of one or more unscaled 32-bit unsigned integer samples from one or more AIChannel objects in a task.

Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302

Syntax

public IAsyncResult BeginReadUInt32(
	int samplesPerChannel,
	AsyncCallback callback,
	Object state
)

Public Function BeginReadUInt32 ( 
	samplesPerChannel As Integer,
	callback As AsyncCallback,
	state As Object
) As IAsyncResult

Parameters

samplesPerChannel: Type: SystemInt32
The number of samples to read. If you set samplesPerChannel to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set samplesPerChannel to -1 for a finite acquisition, the read behavior is set by the ReadAllAvailableSamples property of the DaqStream you are reading from.
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 BeginReadUInt32(Int32, AsyncCallback, Object), call EndReadUInt32(IAsyncResult) with the returned IAsyncResult.

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
Refer to Asynchronous Reads and Writes for additional information.

NI-DAQmx .NET Framework 4.0 API Reference

Table of Contents

AnalogUnscaledReader.BeginReadUInt32 Method

Syntax

Parameters

Return Value

Remarks

See Also

Reference

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