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OPC Data Client - Upgrading Live Binding Applications from pre-5.35 to 5.35 and later

With the release of version 5.35 of the OPC Data Client, the existing Live Binding features such as the DABinder or UABinder are considered obsolete, and have been replaced with a new PointBinder that is specification agnostic (supports both DA and UA).

OPC Data Client applications that use versions prior to 5.34 are recommended to follow the upgrade procedure below when moving to version 5.35 or later of the OPC Data Client, as legacy support for the old versions may be removed in the future. 

Live Binding – Old Project Conversion


This OPC Data Client version still supports both the old (DABinder, UABinder) and new (PointBinder with DAConnectivity or UAConnectivity) Live Binding approaches. The DABinder, UABinder and their corresponding binding types are regarded as obsoleted, and may become unsupported or be removed in future versions of OPC Data Client. It is therefore strongly recommended that you convert your projects to the new Live Binding approach. We have provided tools and instructions to facilitate the conversion.


In order to convert your project that uses the Live Binding to the new approach (assuming that you have OPC Data Client 5.35 or later installed):

  1. Make a backup of your project.
  2. In Visual Studio, perform the steps below for each of your forms (or custom controls or other components) that use Live Binding.
  3. Open the form.
  4. If the form uses a DABinder, drag DAConnectivity from the Toolbox to the designer surface. If the form uses UABinder, drag UAConnectivity from the toolbox to the designer surface. Note that a PointBinder component will be added automatically as well.
  5. Select (click on) the existing DABinder or UABinder component in the component tray (below the form). In the Properties window (for the DABinder or UABinder component you have selected), invoke the “Convert to point bindings” command. The commands are near the bottom of the property grid. If no commands are displayed, right-click in the left column of the property grid, and enable them from the context menu first.
  6. A message box will be displayed, describing the outcome of the conversion. Confirm it by pressing OK. The bindings are binding groups are now converted. Note: Binding groups get new member names
  7. Right-click on the existing DABinder or UABinder component in the component tray (below the form), and delete it (the Delete command).
  8. Save the form, build the project, and test it.