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Submitting data from Infopath 2010 to a Sharepoint 2010 list fail

Posted By:      Posted Date: October 28, 2010    Points: 0   Category :SharePoint

Hello everybody,

I'm trying to submit data from an Infopath 2010 form to a Sharepoint list using the following tutorial: http://msdn.microsoft.com/en-us/library/cc162745(office.12).aspx 

However this doesn't work. The form creates new entries but when you whant to change or delete an entry, I get the following error: Object reference not set to an instance to an object. Any idea what is wrong with the code?

using Microsoft.Office.InfoPath;
using System;
using System.Windows.Forms;
using System.Xml;
using System.Xml.XPath;
using mshtml;

namespace Sharepointupdate
  public partial class FormCode
    // Membervariablen werden in browserfähigen Formularen nicht unterstützt.
    // Schreiben und lesen Sie diese Werte stattdessen aus dem FormState-
    // Wörterbuch, indem Sie Code wie folgt verwenden:
    // private object _memberVariable
    // {
    //   get
    //   {
    //     return FormState["_memberVariable"];
    //   }
    //   set
    //   {
    //     FormState["_memberVariable"] = value;
    //   }
    // }

    // HINWEIS: Das folgende Verfahren ist für Microsoft InfoPath erforderlich.
    // Es kann 

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