我正在尝试使用下面的代码检查数字是否有效。这行得通吗?
try
{
TwilioRest.Account account = new TwilioRest.Account(TwilioRest.TwilioConstants.ACCOUNT_SID, TwilioRest.TwilioConstants.ACCOUNT_TOKEN);
string strResponse = account.request(String.Format("/{0}/Accounts/{1}/OutgoingCallerIds", TwilioRest.TwilioConstants.API_VERSION, TwilioRest.TwilioConstants.ACCOUNT_SID), "GET");
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(strResponse);
XmlNode root = xmlDoc.DocumentElement.ChildNodes[0];
int cont = 0;
if (root.ChildNodes.Count > 0)
{
for (int i = 0; i < root.ChildNodes.Count; i++)
{
string ss = root.ChildNodes[i].SelectSingleNode("PhoneNumber").ChildNodes[0].Value;
if (phoneno.Trim() == ss)
{
cont = 1;
break;
}
}
}
if (cont == 0)
{
btnSubmit.Visible = true;
}
}
catch (TwilioRest.TwilioRestException ex)
{
mpValidatePhone.Show();
ucMsgPhone.MessageType = MessageType.Error;
ucMsgPhone.Text = TwilioErrorMessage(ex.ToString());
}