public static class PasswordBoxHelper
2 {
3 public static readonly DependencyProperty PasswordProperty =
4 DependencyProperty.RegisterAttached(
"Password",
5 typeof(
string),
typeof(PasswordBoxHelper),
6 new FrameworkPropertyMetadata(
string.Empty, OnPasswordPropertyChanged));
7 public static readonly DependencyProperty AttachProperty =
8 DependencyProperty.RegisterAttached(
"Attach",
9 typeof(
bool),
typeof(PasswordBoxHelper),
new PropertyMetadata(
false, Attach));
10 private static readonly DependencyProperty IsUpdatingProperty =
11 DependencyProperty.RegisterAttached(
"IsUpdating",
typeof(
bool),
12 typeof(PasswordBoxHelper));
13
14 public static void SetAttach(DependencyObject dp,
bool value)
15 {
16 dp.SetValue(AttachProperty, value);
17 }
18 public static bool GetAttach(DependencyObject dp)
19 {
20 return (
bool)dp.GetValue(AttachProperty);
21 }
22 public static string GetPassword(DependencyObject dp)
23 {
24 return (
string)dp.GetValue(PasswordProperty);
25 }
26 public static void SetPassword(DependencyObject dp,
string value)
27 {
28 dp.SetValue(PasswordProperty, value);
29 }
30 private static bool GetIsUpdating(DependencyObject dp)
31 {
32 return (
bool)dp.GetValue(IsUpdatingProperty);
33 }
34 private static void SetIsUpdating(DependencyObject dp,
bool value)
35 {
36 dp.SetValue(IsUpdatingProperty, value);
37 }
38 private static void OnPasswordPropertyChanged(DependencyObject sender,
39 DependencyPropertyChangedEventArgs e)
40 {
41 PasswordBox passwordBox = sender
as PasswordBox;
42 passwordBox.PasswordChanged -=
PasswordChanged;
43 if (!(
bool)GetIsUpdating(passwordBox))
44 {
45 passwordBox.Password = (
string)e.NewValue;
46 }
47 passwordBox.PasswordChanged +=
PasswordChanged;
48 }
49 private static void Attach(DependencyObject sender,
50 DependencyPropertyChangedEventArgs e)
51 {
52 PasswordBox passwordBox = sender
as PasswordBox;
53 if (passwordBox ==
null)
54 return;
55 if ((
bool)e.OldValue)
56 {
57 passwordBox.PasswordChanged -=
PasswordChanged;
58 }
59 if ((
bool)e.NewValue)
60 {
61 passwordBox.PasswordChanged +=
PasswordChanged;
62 }
63 }
64 private static void PasswordChanged(
object sender, RoutedEventArgs e)
65 {
66 PasswordBox passwordBox = sender
as PasswordBox;
67 SetIsUpdating(passwordBox,
true);
68 SetPassword(passwordBox, passwordBox.Password);
69 SetIsUpdating(passwordBox,
false);
70 }
71 }
View Code
2.在View层XAML绑定
1 <PasswordBox x:Name="passwordBox" PasswordChar="*" Helper:PasswordBoxHelper.Attach="True"
2 Helper:PasswordBoxHelper.Password="{Binding Path=Pwd,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
1 <Window x:Class="HR_Test01.View.LoginView"
2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4 xmlns:Helper="clr-namespace:HR_Test01.Model"
5 xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
6 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
7 xmlns:local="clr-namespace:HR_Test01.View"
8 mc:Ignorable="d" AllowsTransparency="True" WindowStyle="None" MouseLeftButtonDown="Window_MouseLeftButtonDown"
9 Title="登录界面" Height="250" Width="400" WindowStartupLocation="CenterScreen">
WPF PasswordBox password数据绑定
标签：width mic send one ssi stat 数据绑定 span owa
