TopicRead Property (EasyDAClientHoldPeriods)

After an item read call, connection to an OPC item will be maintained at least for the time period specified here.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<DataMemberAttribute()>
<ValueLimitsAttribute(0, 2147483647)>
Public Property TopicRead As Integer

'Usage
 
Dim instance As EasyDAClientHoldPeriods
Dim value As Integer
 
instance.TopicRead = value
 
value = instance.TopicRead

[DataMember()]
[ValueLimits(0, 2147483647)]
public int TopicRead {get; set;}

[DataMember()]
[ValueLimits(0, 2147483647)]
public:
property int TopicRead {
   int get();
   void set (    int value);
}

Property Value

The default value of this property is 30000.

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	The value of an argument is outside the allowable range of values as defined by the invoked method. 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.

Exception

Description

System.ArgumentOutOfRangeException

The value of an argument is outside the allowable range of values as defined by the invoked method.

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 property is used by following client implementations:

Native client: yes,
NET API client: no.

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

EasyDAClientHoldPeriods Class
EasyDAClientHoldPeriods Members

Documentation Home, Send Feedback. Resources: Knowledge Base, Product Downloads. Technical support: Online Forums, FAQ.

Missing some example? Ask us for it on our Online Forums! You do not have to own a commercial license in order to use Online Forums, and we reply to every post.