SubmitToHostEventArgs class

Use the SubmitToHostConnection object from the Microsoft.Office.InfoPath namespace to perform actions not supported by rules or other declarative logic. For more information about creating a SubmitToHostAdapter data connection in an InfoPath form template, see Hosting the InfoPath Form Editing Environment in a Custom Web Form.

In the following example, properties of the SubmitToHostEventArgs object are used to populate text boxes in the Web page.

protected void XmlFormView1_SubmitToHost(object sender, SubmitToHostEventArgs e)
{
    TextBox2.Text = e.AdapterName.ToString();
    if (e.ReturnStatus = true)
    {
        TextBox3.Text = e.ReturnStatus.ToString();
    }
    else
    {
        TextBox3.Text = e.ErrorMessage.ToString();
    }
}

Reference