SharepointListQueryConnection.Execute Method (XPathNavigator) (Microsoft.Office.InfoPath)

Overrides the default Execute method to allow specifying a different location to insert the data that is returned.

Namespace: Microsoft.Office.InfoPath
Assembly: Microsoft.Office.InfoPath (in microsoft.office.infopath.dll)

Syntax

'Declaration
Public MustOverride Sub Execute ( _
    output As XPathNavigator _
)
'Usage
Dim instance As SharepointListQueryConnection
Dim output As XPathNavigator

instance.Execute(output)

public abstract void Execute (
    XPathNavigator output
)

Parameters

• output
  An XPathNavigator that specifies an XML node in the primary or a secondary data source of the form into which to insert the returned data. The XPathNavigator passed as the output parameter can also specify to insert the data into any XML file on the local computer, or into a System.Xml.XmlDocument held in memory.

Exceptions

Exception type	Condition
WebException	The query operation failed or returned no data (the queried list is empty).
ArgumentNullException	The parameter passed to this method is null.
ArgumentException	The parameter passed to this method is not valid. For example, it is of the wrong type or format.

Remarks

Setting the output parameter to null has the same effect as using the default Execute method to return data using the declarative settings defined in the form template.

This member can be accessed only by forms running in the same domain as the currently open form, or by forms that have been granted cross-domain permissions.

This type or member can be accessed from code running in forms opened in Microsoft Office InfoPath 2007 or in a Web browser.

Example

In the following example, the Execute(output) method of the SharepointListQueryConnection class is used to execute a query against the "Contacts" connection and store the output in an XmlDocument that is created in memory. It then displays the output stored in the XmlDocument in the QueryOutput field of the form.

public void ExecuteOutput_Clicked(object sender, ClickedEventArgs e)
{
   // Create the XmlDocument to accept the query results.
   XmlDocument outputFile = new XmlDocument();
   outputFile.LoadXml(
      "<?xml version=\"1.0\" encoding=\"utf-8\" ?><outputRoot></outputRoot>");

   // Create XmlNamespaceManager for XmlDocument object. When
   // creating a more complex document, use AddNamespace method
   // to add a mapping from namespace prefix to namespace URL for 
   // each namespace to this object.
   XmlNamespaceManager outputFileNamespaceManager = 
      new XmlNamespaceManager(outputFile.NameTable);

   // Create an XPathNavigator positioned at the root of the
   // XmlDocument output file created above.
   XPathNavigator outputFileNavigator = outputFile.CreateNavigator();
   XPathNavigator outputRootNavigator = 
      outputFileNavigator.SelectSingleNode("/outputRoot", 
      outputFileNamespaceManager);

   // Query the SharePoint list defined for the 
   // SharepointListQueryConnection and log the results
   // in the XmlDocument created above.
    SharepointListQueryConnection queryConnection = 
      (SharepointListQueryConnection)(DataConnections["Contacts"]);
    queryConnection.Execute(outputRootNavigator);

   // Insert the results of the query from the XmlDocument in the 
   // QueryOutput field of the main data source of the form.
   XPathNavigator mainNavigator = MainDataSource.CreateNavigator();
   XPathNavigator queryOutputNavigator = 
      mainNavigator.SelectSingleNode("/my:myFields/my:QueryOutput",
      NamespaceManager);
    queryOutputNavigator.SetValue(outputRootNavigator.InnerXml);
}

Public Sub ExecuteOutput_Clicked(ByVal sender As Object , _
   ByVal e As ClickedEventArgs)
{
   ' Create the XmlDocument to accept the query results.
   Dim outputFile As XmlDocument = new XmlDocument()
   outputFile.LoadXml(
      "<?xml version=\"1.0\" encoding=\"utf-8\" ?><outputRoot></outputRoot>")

   ' Create XmlNamespaceManager for XmlDocument object. When
   ' creating a more complex document, use AddNamespace method
   ' to add a mapping from namespace prefix to namespace URL for 
   ' each namespace to this object.
   Dim outputFileNamespaceManager As XmlNamespaceManager  = _
      new XmlNamespaceManager(outputFile.NameTable)

   ' Create an XPathNavigator positioned at the root of the
   ' XmlDocument output file created above.
   Dim outputFileNavigator As XPathNavigator = _
      outputFile.CreateNavigator()
   Dim outputRootNavigator As XPathNavigator = 
      outputFileNavigator.SelectSingleNode("/outputRoot", 
      outputFileNamespaceManager)

   ' Query the SharePoint list defined for the 
   ' SharepointListQueryConnection and log the results
   '  in the XmlDocument created above.
    Dim myQueryConnection As SharepointListQueryConnection  = _
      DirectCast(DataConnections["Contacts"], _
      SharepointListQueryConnection)
    myQueryConnection.Execute(outputRootNavigator);

   ' Insert the results of the query from the XmlDocument 
   ' in the QueryOutput field of the main data source of the form.
   Dim mainNavigator As XPathNavigator  = _
      MainDataSource.CreateNavigator()
   Dim queryOutputNavigator As XPathNavigator  = 
      mainNavigator.SelectSingleNode("/my:myFields/my:QueryOutput", _
      NamespaceManager)
    queryOutputNavigator.SetValue(outputRootNavigator.InnerXml)
End Sub

See Also

Reference

SharepointListQueryConnection Class
SharepointListQueryConnection Members
Microsoft.Office.InfoPath Namespace