XmlFormView Class

The XmlFormView object and its associated members are used to display InfoPath forms in a Web browser. No additional components are necessary on the desktop computer except a Web browser in order to open and fill out a form based on a browser-enabled form template.

InfoPath Forms Services uses the XmlFormView control to display forms based on form templates designed in Microsoft InfoPath 2010 so that they are browser-compatible. Developers can also use the XmlFormView control to show InfoPath forms in custom Web pages. This requires Microsoft SharePoint Server 2010 with a client access license for InfoPath Forms Services. For more information on how to develop custom Web pages with the XmlFormView control, see Hosting the InfoPath Form Editing Environment in a Custom Web Form.

Note
As an alternative to using the XmlFormView control, you can now use the BrowserFormWebPart to display InfoPath forms in SharePoint pages. For more information, see Working with the InfoPath Form Web Part.

In the following example, the XmlFormView control, XmlFormView1, is hosted in a custom Web page and contains a browser-enabled form template located on the same site. The NotifyHost event of the XmlFormView control is used to populate a control, TextBox1, in the custom Web page.

Imports Microsoft.Office.InfoPath.Server.Controls
Protected Sub XmlFormView1_NotifyHost(ByVal sender As Object, ByVal e As Microsoft.Office.InfoPath.Server.Controls.NotifyHostEventArgs) Handles XmlFormView1.NotifyHost
    TextBox1.Text = e.Notification.ToString()
End Sub

The form code necessary to send a value from the main data source in the form, my:field2, to the hosting Web page uses the NotifyHost method of the XmlForm object available in the Microsoft.Office.InfoPath namespace, in this case from a button in the form.

using Microsoft.Office.InfoPath.Server.Controls
protected void XmlFormView1_NotifyHost(object sender, NotifyHostEventArgs e)
{
    TextBox1.Text = e.Notification.ToString();
}

The form code necessary to send a value from the main data source in the form, my:field2, to the hosting Web page uses the NotifyHost method of the XmlForm object available in the Microsoft.Office.InfoPath namespace, in this case from a button in the form.

public void CTRL3_5_Clicked(object sender, ClickedEventArgs e)
{
    XPathNavigator myNav = this.MainDataSource.CreateNavigator();
    this.NotifyHost(myNav.SelectSingleNode("/my:myFields/my:field2", this.NamespaceManager).ToString());
}

Reference