How to start SharePoint 2010 workflow from Infopath 2010 code behind?

Question

I have an Infopath 2010 template with 2 buttons: submit and cancel. When the submit button is clicked I the form is saved to a document library in SharePoint 2010 and the corresponding workflow is clicked off. The user can then open the form and cancel the request by clicking on cancel. I would like to start a different workflow when cancel is clicked. Any ideas as to how that could be done?

Thanks

Answer 1

That is not a bad workaround Nostromo but we actually ended up using the out of the box SharePoint web services to start the workflow from InfoPath code behind. Here is the method we developed to do that.

  public static void StartWorkflow(string siteUrl, string docUrl,string workflowName, List<string> approvers,string description)
        {
            var workflow = new Workflow();
            workflow.Url = siteUrl+ "/_vti_bin/workflow.asmx";
            workflow.Credentials = System.Net.CredentialCache.DefaultCredentials;
            XmlNode assocNode = workflow.GetTemplatesForItem(docUrl);
            XmlNamespaceManager nsmgr = new XmlNamespaceManager(assocNode.OwnerDocument.NameTable);
            nsmgr.AddNamespace("wf", "http://schemas.microsoft.com/sharepoint/soap/workflow/");

            XmlDocument doc = new XmlDocument();
            Guid templateID = new Guid();
            bool workflowFound = false;
            XPathNodeIterator rows = assocNode.CreateNavigator().Select("//wf:WorkflowTemplate", nsmgr);
            while (rows.MoveNext())
            {
                if (rows.Current.GetAttribute("Name", "").ToLower() == workflowName.ToLower())
                {
                    doc.LoadXml(rows.Current.SelectSingleNode("wf:AssociationData/wf:string", nsmgr).Value);
                    XPathNavigator idNode = rows.Current.SelectSingleNode("wf:WorkflowTemplateIdSet", nsmgr);
                    templateID = new Guid(idNode.GetAttribute("TemplateId", ""));
                    workflowFound = true;
                    break;
                }
            }

            if(!workflowFound)
                throw new Exception("System couldn't location the workflow with name: " +workflowName);

            XmlElement xmlRoot = doc.DocumentElement;
            nsmgr = new XmlNamespaceManager(assocNode.OwnerDocument.NameTable);
            nsmgr.AddNamespace("my", "http://schemas.microsoft.com/office/infopath/2003/myXSD");
            xmlRoot.SelectSingleNode("/my:myFields/my:Description", nsmgr).InnerText = description;
            XmlNode reviewersNode = xmlRoot.SelectSingleNode("/my:myFields/my:Reviewers", nsmgr);

            reviewersNode.InnerXml = "";

            foreach (var user in approvers)
            {
                XmlNode personNode = reviewersNode.AppendChild(doc.CreateElement("my:Person"));
                XmlNode accountIdNode = personNode.AppendChild(doc.CreateElement("my:AccountId"));
                accountIdNode.InnerText = user;
                XmlNode accountTypeNode = accountIdNode.AppendChild(doc.CreateElement("my:AccountType"));
                accountTypeNode.InnerText = "User";
            }

            XmlNode workflowNode = workflow.StartWorkflow(docUrl, templateID, doc.DocumentElement);


        }