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Old May 7th, 2011, 06:27 PM
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Default SharePoint as secondary data source


I am using Infopath and what I am trying to do is : I have a repeating table that should get its data from a secondary data source. In this case, the secondary data source is a SharePoint List.

But, we cannot retrieve multiple items from a secondary data source and copy them into a repeating table in Main data Source.

So I am trying to achieve this through C# code. I am getting an "Invalid Operation Exception" . Can anyone help, where I am doing wrong?

public void InternalStartup()
((ButtonEvent)EventManager.ControlEvents["get_Items"]).Clicked += new ClickedEventHandler(get_Items_Clicked);

public void get_Items_Clicked(object sender, ClickedEventArgs e)
// Write your code here.
XPathNavigator secDSNav = DataSources["mydatasource"].CreateNavigator();
//Retrieve the rows of the secondary data sources.

XPathNodeIterator rows = secDSNav.Select("/dfs:myFields/dfs:dataFields/dfs:Items",NamespaceManager);

int counter = 1;

while (rows.MoveNext())
string title = GetValueOrEmptyString(rows.Current.SelectSingleNod e("@Field1", NamespaceManager));

string status = GetValueOrEmptyString(rows.Current.SelectSingleNod e("@Field2", NamespaceManager));

DateTime myDate = GetValueOrEmptyString(rows.Current.SelectSingleNod e("@Field3", NamespaceManager));

// Increment the counter


// Add the item to the repeating table

AddItem(title, status, myDate);


// Remove the first empty item from the repeating table


public static string GetValueOrEmptyString(XPathNavigator node)
return node == null ? string.Empty : node.Value;

private void AddItem(string title, string status, DateTime mydate)

XmlDocument doc = new XmlDocument();
XmlNode group = doc.CreateElement("p:Item", "http://www.xxxx.com/myform/2009");
XmlNode field = doc.CreateElement("p:Field1", "http://www.xxxx.com/myform/2009");
XmlNode node = group.AppendChild(field);
node.InnerText = title;

field = doc.CreateElement("p:Field2", "http://www.xxxx.com/myform/2009");
node = group.AppendChild(field);
node.InnerText = status;

field = doc.CreateElement("p:Field3", "http://www.xxxx.com/myform/2009");
node = group.AppendChild(field);
node.InnerText = mydate.ToString();

MainDataSource.CreateNavigator().SelectSingleNode( "/p:myrootElement/p:Items", NamespaceManager).AppendChild(doc.DocumentElement. CreateNavigator());


private void DeleteFirstEmptyItem()


XPathNavigator domNav = MainDataSource.CreateNavigator();

XPathNavigator itemNav = domNav.SelectSingleNode("/p:myrootElement/p:Items/p:Item[1]", NamespaceManager);

if (itemNav != null)





Thanks in advance,
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