windowsphone7下定制密码输入框
SDK中提供的PasswordBox很好用，但是不能实现显示密码的功能。
个人通过组合PhoneTextBox和PasswordBox来定制了一个用户控件，作为密码的输入框，并可以根据选择来实现隐藏或者显示密码。
xaml代码：
public partial class PasswordTextBox : UserControl { #region Dependency Properties public static readonly DependencyProperty IsShowPasswordProperty = DependencyProperty.Register("IsShowPassword", typeof(bool), typeof(PasswordTextBox), new PropertyMetadata(OnIsShowPasswordPropertyChanged)); public static readonly DependencyProperty PasswordProperty = DependencyProperty.Register("Password", typeof(string), typeof(PasswordTextBox), new PropertyMetadata(OnPasswordPropertyChanged)); #endregion #region Data Members // 当密码为空时，保留ShowPwdTB的可见性(用于显示Hint文本)；此时设置隐藏密码的操作无效 private bool m_IsNeedHidePassword; #endregion #region Constructor public PasswordTextBox() { InitializeComponent(); m_IsNeedHidePassword = false; } #endregion #region Public Methods public bool IsShowPassword { get { return (bool)GetValue(IsShowPasswordProperty); } set { SetValue(IsShowPasswordProperty, value); } } public string Password { get { if (ShowPwdTB.Visibility == Visibility.Visible) { return ShowPwdTB.Text; } else { return HidePwdTB.Password; } } set { SetValue(PasswordProperty, value); } } #endregion #region Event Handler private void OnShowPwdChanged(object sender, EventArgs e) { if (ShowPwdTB.Visibility == Visibility.Visible && ShowPwdTB.Text.Length == 0) { ShowPwdTB.Hint = AppRes.PasswordHintText; } else { ShowPwdTB.Hint = string.Empty; } } private void OnShowPwdTBGotFocus(object sender, EventArgs e) { if ((!IsShowPassword && ShowPwdTB.Text.Length == 0) || m_IsNeedHidePassword) { m_IsNeedHidePassword = false; HidePasswordTB(); HidePwdTB.Focus(); } } private void OnHidePwdTBLostFocus(object sender, EventArgs e) { if (HidePwdTB.Password.Length == 0) { ShowPasswordTB(); ShowPwdTB.Text = string.Empty; ShowPwdTB.Hint = AppRes.PasswordHintText; } } private static void OnIsShowPasswordPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { PasswordTextBox pwdTB = d as PasswordTextBox; if ((bool)e.NewValue) { pwdTB.ShowPwdTB.Visibility = Visibility.Visible; pwdTB.HidePwdTB.Visibility = Visibility.Collapsed; pwdTB.ShowPwdTB.Text = pwdTB.HidePwdTB.Password; pwdTB.HidePwdTB.Password = string.Empty; pwdTB.m_IsNeedHidePassword = false; } else { if (pwdTB.ShowPwdTB.Text.Length == 0) { pwdTB.m_IsNeedHidePassword = true; return; } pwdTB.ShowPwdTB.Visibility = Visibility.Collapsed; pwdTB.HidePwdTB.Visibility = Visibility.Visible; pwdTB.HidePwdTB.Password = pwdTB.ShowPwdTB.Text; pwdTB.ShowPwdTB.Text = string.Empty; } } private static void OnPasswordPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { PasswordTextBox pwdTB = d as PasswordTextBox; if (pwdTB.ShowPwdTB.Visibility == Visibility.Visible) { pwdTB.ShowPwdTB.Text = (string)e.NewValue; } else { pwdTB.HidePwdTB.Password = (string)e.NewValue; } } #endregion #region Private Methods private void ShowPasswordTB() { ShowPwdTB.Visibility = Visibility.Visible; HidePwdTB.Visibility = Visibility.Collapsed; } private void HidePasswordTB() { ShowPwdTB.Visibility = Visibility.Collapsed; HidePwdTB.Visibility = Visibility.Visible; } #endregion }