ChangeDataSetFieldSubscription(IEasyUASubscriber,Int32,UASubscribeDataSetFilter) Method

Changes parameters of an existing dataset field subscription, specifying a new filter.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
Public Overloads Shared Sub ChangeDataSetFieldSubscription( _
   ByVal subscriber As IEasyUASubscriber, _
   ByVal fieldHandle As Integer, _
   ByVal subscribeDataSetFilter As UASubscribeDataSetFilter _
)

'Usage
 
Dim subscriber As IEasyUASubscriber
Dim fieldHandle As Integer
Dim subscribeDataSetFilter As UASubscribeDataSetFilter
 
IEasyUASubscriberExtension.ChangeDataSetFieldSubscription(subscriber, fieldHandle, subscribeDataSetFilter)

[Extension()]
public static void ChangeDataSetFieldSubscription( 
   IEasyUASubscriber subscriber,
   int fieldHandle,
   UASubscribeDataSetFilter subscribeDataSetFilter
)

[Extension()]
public:
static void ChangeDataSetFieldSubscription( 
   IEasyUASubscriber^ subscriber,
   int fieldHandle,
   UASubscribeDataSetFilter^ subscribeDataSetFilter
)

Parameters

subscriber: The subscriber object that will perform the operation.
fieldHandle: The dataset field handle.
subscribeDataSetFilter: Specifies how the incoming PubSub messages should be filtered before being delivered to the application.

Exceptions

Exception Description

Exception	Description
System.ArgumentException	One of the arguments provided to a method is not valid. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.
System.ArgumentNullException	A `null` reference (`Nothing` in Visual Basic) is passed to a method that does not accept it as a valid argument. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

System.ArgumentException

One of the arguments provided to a method is not valid.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

System.ArgumentNullException

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

This method operates (at least in part) asynchronously, with respect to the caller. The actual execution of the operation may be delayed, and the outcome of the operation (if any) is provided to the calling code using an event notification, callback, or other means explained in the text. In a properly written program, this method does not throw any exceptions. You should therefore not put try/catch statements or similar constructs around calls to this method. The only exceptions thrown by this method are for usage errors, i.e. when your code violates the usage contract of the method, such as passing in invalid arguments or calling the method when the state of the object does not allow it. Any operation-related errors (i.e. errors that depend on external conditions that your code cannot reliably check) are indicated by the means the operation returns its outcome (if any), which is described in the text. For more information, see Do not catch any exceptions with asynchronous or multiple-operation methods.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

IEasyUASubscriberExtension Class
IEasyUASubscriberExtension Members
Overload List

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