/// <summary>
/// erstelle Verbindung zum OS Server
/// </summary>
private OSMWebService.OSMService GetOSMService()
{
    OSMWebService.OSMService osmService = new OSMWebService.OSMService();

    //  "http://hostname:8580/OSMService";
    osmService.Url = "http://" + OsmManager.WSHostname + ":" + OsmManager.WSPort.ToString() + "/OSMService";

    // Anmeldung
    osmService.Credentials = new System.Net.NetworkCredential(OsmManager.Username, OsmManager.Password);

    return osmService;
}

/// <summary>
/// sucht Elemente in einer Klasse
/// </summary>
/// <remarks>
/// Sucht in der Klasse "className" alle Elemente, deren Wert des Attributes "attributName" mit
/// "value" übereinstimmen.
/// </remarks>
/// <returns>Liste oder null</returns>
private SearchResponse SearchItems(string className, string attributeName, string value)
{
    OSMWebService.OSMService osmService = GetOSMService();

    OSMWebService.SearchRequest searchRequest = new SearchRequest();

    // welche Klassen abfragen
    string[] classNames = new string[1];
    classNames[0] = className;
    searchRequest.classNames = classNames;
    searchRequest.showAllAttributes = true;

    // Suchkriterien (elid)
    SearchCriteria searchCriteria = new SearchCriteria();
    searchCriteria.attributeName = attributeName;
    searchCriteria.sortOrder = OSMWebService.SortOrder.None;
    searchCriteria.value = value;
    searchCriteria.@operator = OSMWebService.SearchOperator.Equals;
    SearchCriteria[] searchCriteriaArray = new SearchCriteria[1];
    searchCriteriaArray[0] = searchCriteria;
    searchRequest.criteria = searchCriteriaArray;

    // suchen ...
    SearchResponse searchResponse;
    searchResponse = osmService.itemSearch(searchRequest);

    return searchResponse;
}

/// <summary>
/// liefert alle Elemente eine Klasse
/// </summary>
/// <remarks>Implementiert IDBConnector:GetAllElementsOfClass()</remarks>
/// <returns>OSMElement Liste oder null</returns>
public ArrayList GetAllElementsOfClass(string sClassname)
{
    // suchen ...
    SearchResponse searchResponse = SearchItems(sClassname, "ELID", "*");

    // Attribute dem Element zuweisen
    int nResponses = searchResponse.numberOfItems;
    if (nResponses == 0)
        return null;

    ArrayList aList = new ArrayList();

    if (nResponses > 0)
    {
        foreach (OSMWebService.Item aItem in searchResponse.results)
        {
            OSMElement osmElement = new OSMElement();
            osmElement.ELID = aItem.id;
            foreach (OSMWebService.Attribute aAttribute in aItem.attributes)
            {
                OSMAttribute osmAttribute = new OSMAttribute(aAttribute.name, aAttribute.value);
                osmElement.AddAttribute(osmAttribute);
            }
            aList.Add(osmElement);
        }
    }
    return aList;
}