Native method call failed
0
悬赏园豆：10
[已关闭问题]
Contact contact = new Contact();
OutlookSession outlook = new OutlookSession();
contact.mobilephone="1235262";
outlook.Contacts.Items.Add(contact);
我是从xml里解析各个值然后赋给联系人各个属性的，向联系人里插入某个联系人时出现如下错误:Native method call failed.
请问哪位前辈有什么解决方法吗？
问题补充：
黎老师您好：
我是从服务器上下载xml并解析后执行到这句outlook.Contacts.Items.Add(contact);时出现这个Native method call failed.错误，我之前也曾经成功添加，但一段时间后就不行了，不知道是什么原因，请您帮我看一下，小弟在此先谢谢了！
private static void AnalyzeLoadContactXml()//通讯录下载
{
byte[] review = new byte[1024 * 1024];
string s = "";
int index = 0;
int errRead = 0;
string url = "phonebook_get.php?userid=" + Int32.Parse(MeraldRegistry.UserID) + "&password=" + MeraldRegistry.PassWord + "&encoding=&";
Cursor.Current = Cursors.WaitCursor;
errRead = WebServices.WebServicesReadXml(url, review);
if (errRead == 0)
{
XmlDocument xml = new XmlDocument();
xml.LoadXml(MeraldUtil.ByteArrayToString(review));
int count = int.Parse(xml.SelectSingleNode(".//count").InnerText);
for (int i = 1; i <= count; i++)
{
OutlookSession outlook = new OutlookSession();
Contact contact = new Contact();
s = xml.SelectSingleNode(".//pl" + i).InnerText;
//index = s.IndexOf("|");
//contact.LastName = s.Substring(0, index);
//s = s.Substring(index + 1);
index = s.IndexOf("|");
contact.FirstName = s.Substring(0, index);
//contact.FirstName = "";
s = s.Substring(index + 1);
index = s.IndexOf("|");
contact.MobileTelephoneNumber = s.Substring(0, index);
s = s.Substring(index + 1);
index = s.IndexOf("|");
contact.RadioTelephoneNumber = s.Substring(0, index);
//s = s.Substring(index + 1);
