68 lines
2.1 KiB
C#
68 lines
2.1 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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namespace RMWPFUserInterface.Helpers
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{
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public static class PasswordBoxHelper
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{
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public static readonly DependencyProperty BoundPasswordProperty =
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DependencyProperty.RegisterAttached("BoundPassword",
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typeof(string),
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typeof(PasswordBoxHelper),
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new FrameworkPropertyMetadata(string.Empty, OnBoundPasswordChanged));
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public static string GetBoundPassword(DependencyObject d)
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{
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var box = d as PasswordBox;
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if (box != null)
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{
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// this funny little dance here ensures that we've hooked the
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// PasswordChanged event once, and only once.
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box.PasswordChanged -= PasswordChanged;
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box.PasswordChanged += PasswordChanged;
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}
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return (string)d.GetValue(BoundPasswordProperty);
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}
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public static void SetBoundPassword(DependencyObject d, string value)
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{
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if (string.Equals(value, GetBoundPassword(d)))
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return; // and this is how we prevent infinite recursion
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d.SetValue(BoundPasswordProperty, value);
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}
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private static void OnBoundPasswordChanged(
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DependencyObject d,
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DependencyPropertyChangedEventArgs e)
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{
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var box = d as PasswordBox;
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if (box == null)
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{
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return;
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}
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box.Password = GetBoundPassword(d);
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}
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private static void PasswordChanged(object sender, RoutedEventArgs e)
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{
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PasswordBox password = sender as PasswordBox;
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SetBoundPassword(password, password.Password);
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// set cursor past the last character in the password box
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password.GetType().GetMethod("Select", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(password, new object[] { password.Password.Length, 0 });
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}
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}
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}
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