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IInfoPathViewControl Interface

Office 2007
Represents a control present in the view.

Version Information
 Version Added:  InfoPath 2007

Remarks

The IInfoPathViewControl interface, used in conjunction with the IInfoPathDataImporter interface, allows developers to get specific information about the controls in the view, such as the ControlType and the DataType, the Top and Left positions, the XML NodeName associated with the control, the and the InputScope. The Value property is the only property that can be set.

For a list of controls that are enumerated if present in the view, see the GetControls method of the IInfoPathDataImporterFields interface. For a list of acceptable data types that can be used with specific controls, see the Value property of the IInfoPathViewControl interface.

This object or member is used for extending the InfoPath application and is not intended to be used directly from your form code.

For more information about programmatically importing data into an InfoPath form, see the InfoPath Developer Portal on the Microsoft Office Developer Center.

Example

In the following example, the Import method of the IInfoPathDataImporter interface is used to iterate through the mshtml.IEnumUnknown collection of IInfoPathViewControl controls in the view of the active form.

The Import routine is the main part of a solution used to build a custom data importer. The Visual Studio project requires a reference to the Microsoft Office InfoPath 2.0 Type Library and System.Windows.Forms, with Imports statements for each as well as mshtml. Implements statements are required to generate the signatures for the methods provided by the custom data importer interfaces, including IInfoPathDataImporter, IInfoPathDataImporterFields, IInfoPathViewControl, and IPropertyBag.

Bb251038.vs_note(en-us,office.12).gif  Note
To build a custom data importer using a .NET class library, check the Register for COM interop check box on the Compile tab of the class properties editor.
Bb251038.vs_note(en-us,office.12).gif  Note
To debug a custom data importer, set a Start Action in Visual Studio to Start an external program, and browse to INFOPATH.EXE located at <drive>:\Program Files\Microsoft Office\Office12\. This option is available on the Debug tab of the class properties editor.
Visual Basic
Imports Microsoft.Office.Interop.InfoPath
Imports System.Windows.Forms
Imports mshtml

<ComClass(Class1.ClassId, Class1.InterfaceId, Class1.EventsId)> Public Class Class1
    Implements Microsoft.Office.Interop.InfoPath.IInfoPathDataImporter
    Implements Microsoft.Office.Interop.InfoPath.IInfoPathDataImporterFields
    Implements Microsoft.Office.Interop.InfoPath.IInfoPathViewControl
    Implements Microsoft.Office.Interop.InfoPath.IPropertyBag


    Public Const ClassId As String = "1FEB0DF8-E7F1-4b21-A9EE-B06D5FECC572"
    Public Const InterfaceId As String = "9F9F685C-71A0-46ec-A7F9-A86AF8CBC2A8"
    Public Const EventsId As String = "ED7C0C49-3F89-40a2-A50E-C59E8F682B08" 

Public Sub Import(ByVal pPrintSettings As Microsoft.Office.Interop.InfoPath.IPropertyBag, ByVal punkViewControls As mshtml.IEnumUnknown) Implements Microsoft.Office.Interop.InfoPath.IInfoPathDataImporter.Import

    Dim pControl As IInfoPathViewControl    
    Dim pUnk As Object
    Dim pcelt As UInt16 = 1
    Dim pceltFetched As UInt16 = 0

    Try
        'Gets first control in the view
        punkViewControls.RemoteNext(pcelt, pUnk, pceltFetched)

        Do While pUnk.ToString() <> "Nothing"
            pControl = pUnk
            MessageBox.Show(pControl.ControlType)
            'Gets next control in the view
            punkViewControls.RemoteNext(pcelt, pUnk, pceltFetched)
        Loop
    Catch e As Exception
        If e.Message = "Object reference not set to an instance of an object." Then
            'Signals the end of the enumeration/controls in the view
        Else
            MessageBox.Show("Error: " & e.ToString & " " & e.Message)
        End If
    End Try
End Sub



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