框架优化

LAEPS/Helpers/PasswordBoxHelper.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace LAEPS.Helpers
+{
+    public static class PasswordBoxHelper
+    {
+        public static readonly DependencyProperty PasswordProperty =
+            DependencyProperty.RegisterAttached(
+                "Password",
+                typeof(string),
+                typeof(PasswordBoxHelper),
+                new FrameworkPropertyMetadata(
+                    string.Empty,
+                    FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
+                    OnPasswordPropertyChanged));
+
+        public static void SetPassword(DependencyObject d, string value)
+            => d.SetValue(PasswordProperty, value);
+
+        public static string GetPassword(DependencyObject d)
+            => (string)d.GetValue(PasswordProperty);
+
+        private static void OnPasswordPropertyChanged(
+            DependencyObject d,
+            DependencyPropertyChangedEventArgs e)
+        {
+            if (d is PasswordBox pb)
+            {
+                pb.PasswordChanged -= PasswordChanged;
+                if (pb.Password != (string)e.NewValue)
+                {
+                    pb.Password = (string)e.NewValue;
+                }
+                pb.PasswordChanged += PasswordChanged;
+            }
+        }
+
+        private static void PasswordChanged(object sender, RoutedEventArgs e)
+        {
+            if (sender is PasswordBox pb)
+            {
+                SetPassword(pb, pb.Password);
+            }
+        }
+    }
+}