Save decoded attachment

Save-Decoded-Attachment.cs

//Create an XmlNamespaceManager
XmlNamespaceManager ns = this.NamespaceManager;

//Create an XPathNavigator object for the Main data source
XPathNavigator xnMain = this.MainDataSource.CreateNavigator();

//Create an XPathNavigator object for the attachment node
XPathNavigator xnAttNode = xnMain.SelectSingleNode("/my:myFields/my:theAttachmentField", ns);

//Obtain the text of the node.
string theAttachment = xnAttNode.Value;
if(theAttachment.Length > 0)
{
   InfoPathAttachmentDecoder myDecoder = new InfoPathAttachmentDecoder(theAttachment);
   myDecoder.SaveAttachment(@"Path to the folder to save the attachment");
}