/// <summary>
/// 点击登录按钮，根据登录状态执行不同操作。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void LoginButton_Click(object sender, RoutedEventArgs e)
{
if (LoginButton.Label == "登录")
{
await UpdataUserStatusAsync();
}
else if (LoginButton.Label == "注销")
{
string choice = "";
var msgDialog = new Windows.UI.Popups.MessageDialog("确定要退出登录吗？")
{
Title = "注销"
};
msgDialog.Commands.Add(new Windows.UI.Popups.UICommand("确定", uiCommand => { choice = uiCommand.Label; }));
msgDialog.Commands.Add(new Windows.UI.Popups.UICommand("取消", uiCommand => { choice = uiCommand.Label; }));
await msgDialog.ShowAsync();
if (choice == "确定")
{
OAuthHelper.DeleteTokens();
await UpdataUserStatusAsync();
}
}
}