Subscribe Method (IData)

In This Topic

Subscribe to data updates for a specific tag. Fires %% with details of the data update.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Sub Subscribe( _
   ByVal tag As DataSubscriptionInfo _
)

'Usage
 
Dim instance As IData
Dim tag As DataSubscriptionInfo
 
instance.Subscribe(tag)

void Subscribe( 
   DataSubscriptionInfo tag
)

void Subscribe( 
   DataSubscriptionInfo^ tag
)

Parameters

tag: Tag subscription information.

Example

// establish event handler
connection.DataChangedEvent += new DataChangedHandler(DataChanged);
              
// request data subscriptions
connection.IData.Subscribe(new DataSubscriptionInfo { Tagname = "Tag00001", MinimumElapsedMilliSeconds = 5000 });

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

IData Interface
IData Members