EasyUA Reference
BeginReadValue(NodeId,UInt32,AsyncCallback,Object) Method
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EasyUA Assembly > Advosol.EasyUA Namespace > Session Class > BeginReadValue Method : BeginReadValue(NodeId,UInt32,AsyncCallback,Object) Method

Visual Basic (Usage)
C#

nodeId: The node Id.

attributeId: The Id of the attribute to read.

callback: The callback to use when the async call completes.

userData: The user data that is passed to the callback.

Asynchronously reads the value of the specified attribute of the specified node. The server call is made with maxAge=0 and the TimestampsToReturn property.

Syntax

Visual Basic (Usage)	Copy Code
Dim instance As Session Dim nodeId As NodeId Dim attributeId As UInteger Dim callback As AsyncCallback Dim userData As Object Dim value As IAsyncResult value = instance.BeginReadValue(nodeId, attributeId, callback, userData)

Visual Basic (Usage)

Copy Code

Dim instance As Session
Dim nodeId As NodeId
Dim attributeId As UInteger
Dim callback As AsyncCallback
Dim userData As Object
Dim value As IAsyncResult
 
value = instance.BeginReadValue(nodeId, attributeId, callback, userData)

C#
public IAsyncResult BeginReadValue( NodeId nodeId, uint attributeId, AsyncCallback callback, object userData )

public IAsyncResult BeginReadValue( 
   NodeId nodeId,
   uint attributeId,
   AsyncCallback callback,
   object userData
)

Parameters

nodeId: The node Id.
attributeId: The Id of the attribute to read.
callback: The callback to use when the async call completes.
userData: The user data that is passed to the callback.

Return Value

An object which must be passed to the EndReadValue method.

Requirements

Target Platforms: Windows 7/8/10, Windows Server 2003/2008/2012/2015, .NET4.x

Syntax

Parameters

Return Value

Requirements

See Also

Reference