XmlForm.Extension Property

public:
 abstract property System::Object ^ Extension { System::Object ^ get(); };

public abstract object Extension { get; }

member this.Extension : obj

Public MustOverride ReadOnly Property Extension As Object

Property Value

An Object for accessing the functions and global variables contained in a form's primary form code file using System.Reflection.

Examples

In the following code example, the Extension property is used to return a System.Object to invoke the custom method called MyMethod.

object extObj = this.Extension;
extObj.GetType().InvokeMember("MyMethod",
   BindingFlags.InvokeMethod |
   BindingFlags.DeclaredOnly |
   BindingFlags.Public |
   BindingFlags.Instance, null, extObj, null);

Dim extObj As Object extObj = Me.Extension
extObj.GetType().InvokeMember("MyMethod", _
   BindingFlags.InvokeMethod Or _
   BindingFlags.DeclaredOnly Or _
   BindingFlags.Public Or _
   BindingFlags.Instance, Nothing, extObj, Nothing)

In the following code example, a method called myCustomMethod of the InfoPath form code project class can be accessed from the custom task pane using the Extension property.

// Custom method added to the form code project.
public string myCustomMethod()
{
   return "Method value";
}

' Custom method added to the form code project.
Function myCustomMethod() As String
   myCustomMethod = "Method value"
End Function

To access myCustomMethod from script in the custom task pane, use the DHTML external property of the DHTML window object.

objXmlForm = window.external.XmlForm;
myString = objXmlForm.Extension.myCustomMethod();

Dim objXmlForm
Dim myString
Set objXmlForm = window.external.XmlForm
myString = objXmlForm.Extension.myCustomMethod()

Remarks

The System.Object returned by the Extension property facilitates using the functions and global variables implemented in an InfoPath form code file. Usually, it is used from a custom task pane, from a custom dialog box, or in the XSL Transform (XSLT) of a view where direct access to the functions and variables may be needed.

To use the System.Object within a custom task pane, you must first set a reference to the XmlForm object by using the Dynamic HTML (DHTML) external property of the DHTML window object, as shown in this example.

objXmlForm = window.external.XmlForm;

This member can be accessed only by forms running in the same domain as the currently open form, or by forms that have been granted cross-domain permissions.

This type or member can be accessed only from code running in forms opened in Microsoft InfoPath Filler.

Applies to