/// <summary>
/// On Check button click gets id and checks whether such id exists
/// </summary>
/// <param name="sender">event source</param>
/// <param name="e">event parametres</param>
private void CheckButton_Click(object sender, RoutedEventArgs e)
{
// If not logged in remember about it
if (token == null || currentUser == null)
{
ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(223, 0, 0));
LoginButton.Focus();
System.Media.SystemSounds.Exclamation.Play();
return;
} // if (token == null || currentUser == null)
// Send request
string req = "https://api.vk.com/method/users.get.xml?";
req += "uids=" + FindIDTextBox.Text + "&fields=first_name,last_name&access_token=" + token;
WebRequest request = WebRequest.Create(req);
WebResponse response = request.GetResponse();
XmlDocument xml = new XmlDocument();
xml.LoadXml(new System.IO.StreamReader(response.GetResponseStream()).ReadToEnd());
// If there is an error in response show it for user
if (xml["error"] != null)
{
string errorCode = xml["error"]["error_code"].InnerText;
ErrorText.Content = "Шаг 2: введите адрес и нажмите Проверить";
System.Media.SystemSounds.Exclamation.Play();
// If there was earlier finded user delete him
searchedUser = null;
// Show info about error
switch (errorCode)
{
case "113": MessageBox.Show("Такой страницы не существует", "Ошибка");
ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 0)); return;
case "6": MessageBox.Show("Сервер перегружен запросами, повторите попытку через несколько секунд", "Ошибка"); return;
case "5": MessageBox.Show("Ошибка авторизации. Попробуйте войти еще раз", "Ошибка");
ErrorText.Content = "Шаг 1: войдите ВКонтакте, нажав Войти"; token = null; currentUser = null;
LoginButton.Focus(); return;
case "4": goto case "5";
case "2": MessageBox.Show("Приложение отключено. Попробуйте повторить попытку через несколько минут", "Ошибка"); return;
default: MessageBox.Show("ВКонтакте сообщил о неизвестной ошибке. Попробуйте еще раз", "Ошибка"); return;
} // switch (errorCode)
} // if (xml["error"] != null)
// If user is DELETED there is no such user
if (xml["response"]["user"]["first_name"].InnerText == "DELETED" &&
xml["response"]["user"]["last_name"].InnerText == "")
{
System.Media.SystemSounds.Exclamation.Play();
MessageBox.Show("Такой страницы не существует", "Ошибка");
ErrorText.Content = "Шаг 2: введите адрес и нажмите Проверить";
ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 0));
// If there was earlier finded user delete him
searchedUser = null;
} // if first_name == DELETED && last_name == ""
// save finded user and go to step 3
else
{
searchedUser = new User(xml["response"]["user"]);
ErrorText.Content = "Шаг 3: нажмите Найти путь";
ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 0));
MessageBox.Show(xml["response"]["user"]["first_name"].InnerText +
" " + xml["response"]["user"]["last_name"].InnerText, "Пользователь найден");
FindButton.Focus();
} // if !(if first_name == DELETED && last_name == "")
}
/// <summary>
/// Processes Login button click
/// </summary>
/// <param name="sender">event source</param>
/// <param name="e">event parametres</param>
private void LoginButton_Click(object sender, RoutedEventArgs e)
{
// Open authorization page in new window
browser b = new browser(this);
b.ShowDialog();
// If authorization succeeded in Response we have redirected url
if (Response != null)
{
// getting id & token
Response = Response.Substring(Response.IndexOf('#') + 1);
string[] parsedAns = Response.Split('&');
foreach (var s in parsedAns)
{
if (s.IndexOf("user_id") == 0)
{
id = s.Substring("user_id=".Length);
} // if (s.IndexOf("user_id") == 0)
else if (s.IndexOf("access_token") == 0)
{
token = s.Substring("access_token=".Length);
} // if (s.IndexOf("access_token") == 0)
} // foreach (var s in parsedAns)
ErrorText.Content = "Шаг 2: введите адрес и нажмите Проверить";
ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 0));
// get user's name and take it in title
// create request string
string req = "https://api.vk.com/method/";
req += "users.get.xml?";
req += "uids=" + id + "&";
req += "first_name,last_name&";
req += "access_token=" + token;
// create request
WebRequest request = WebRequest.Create(req);
// send request and get response
WebResponse response = request.GetResponse();
// save response in Xmlocument
XmlDocument xml = new XmlDocument();
xml.LoadXml(new System.IO.StreamReader(response.GetResponseStream()).ReadToEnd());
// gets name from xml (response->user->first_name/last_name)
this.TitleLabel.Content = "Find: " + xml["response"]["user"]["first_name"].InnerText +
" " + xml["response"]["user"]["last_name"].InnerText;
XmlNode node = xml["response"]["user"];
// create current user
currentUser = new User(node);
FindIDTextBox.Focus();
} // if (Response != null)
// else remember about login
else ErrorText.Foreground = new SolidColorBrush(Color.FromRgb(223, 0, 0));
}