Caliburn.Micro是否支持PasswordBox？ [英] Caliburn.Micro support for PasswordBox?
问题描述
位于 http://caliburnmicro.com 的Caliburn.Micro主页作出以下声明，但我无法做出声明CM与PasswordBox控件一起使用，我可以从该示例中想到任何变体。由于名称不同，因此看不到它如何工作。有没有人有一个允许我获取PasswordBox值的CM示例？是否需要特定版本的CM？我正在运行CM的1.5.2版。理想情况下，不使用附加属性，但如果可以与CM一起使用，则只能这样做。请不要进行有关安全性问题的讲座，因为在我看来这不是问题。
The Caliburn.Micro home page at http://caliburnmicro.com makes the below claim but I am unable to make CM work with a PasswordBox control using any variation I can think of from that example. Don't see how this would work anyway since the names are not the same case. Does anyone have a CM example that does allow me to get the value of the PasswordBox? Is there a particular version of CM required? I'm running version 1.5.2 of CM. Ideally w/o using Attached Properties but if can work with CM and the only way then fine. Please no lectures on security issues as that is not an issue in my case.
在视图和视图模型之间应用方法自动使用参数和防护方法
Apply methods between your view and view model automatically with parameters and guard methods
<StackPanel>
<TextBox x:Name="Username" />
<PasswordBox x:Name="Password" />
<Button x:Name="Login" Content="Log in" />
</StackPanel>
public bool CanLogin(string username, string password)
{
return !String.IsNullOrEmpty(username) && !String.IsNullOrEmpty(password);
}
public string Login(string username, string password)
{
...
}
推荐答案
我只能使它与依赖项属性一起使用，有效地绕过了约定绑定的优点由Caliburn.Micro提供。我认识到这不是您的理想选择，但务实地这是我经常使用的解决方案。我相信，当我历史上遇到此障碍时，我在StackOverflow上发现了此帖子在这个方向上。供您考虑：
I've only been able to get it to work with dependency properties, effectively bypassing the convention binding goodness that Caliburn.Micro supplies. I recognize that's not your ideal, but pragmatically this is the solution I regularly use. I believe when I hit this snag historically, I found this post on StackOverflow that led me in this direction. For your consideration:
public class BoundPasswordBox
{
private static bool _updating = false;
/// <summary>
/// BoundPassword Attached Dependency Property
/// </summary>
public static readonly DependencyProperty BoundPasswordProperty =
DependencyProperty.RegisterAttached("BoundPassword",
typeof(string),
typeof(BoundPasswordBox),
new FrameworkPropertyMetadata(string.Empty, OnBoundPasswordChanged));
/// <summary>
/// Gets the BoundPassword property.
/// </summary>
public static string GetBoundPassword(DependencyObject d)
{
return (string)d.GetValue(BoundPasswordProperty);
}
/// <summary>
/// Sets the BoundPassword property.
/// </summary>
public static void SetBoundPassword(DependencyObject d, string value)
{
d.SetValue(BoundPasswordProperty, value);
}
/// <summary>
/// Handles changes to the BoundPassword property.
/// </summary>
private static void OnBoundPasswordChanged(
DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
PasswordBox password = d as PasswordBox;
if (password != null)
{
// Disconnect the handler while we're updating.
password.PasswordChanged -= PasswordChanged;
}
if (e.NewValue != null)
{
if (!_updating)
{
password.Password = e.NewValue.ToString();
}
}
else
{
password.Password = string.Empty;
}
// Now, reconnect the handler.
password.PasswordChanged += PasswordChanged;
}
/// <summary>
/// Handles the password change event.
/// </summary>
static void PasswordChanged(object sender, RoutedEventArgs e)
{
PasswordBox password = sender as PasswordBox;
_updating = true;
SetBoundPassword(password, password.Password);
_updating = false;
}
}
然后，在您的XAML中：
Then, in your XAML:
<PasswordBox pwbx:BoundPasswordBox.BoundPassword="{Binding UserPassword, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,NotifyOnValidationError=True,ValidatesOnDataErrors=True}" />
，在Window标记中找到pwbx作为命名空间：
and pwbx is found as a namespace on the Window tag:
<Window x:Class="MyProject.Views.LoginView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
xmlns:pwbx="clr-namespace:MyProject.Client.Controls">
ViewModel：
The ViewModel:
using Caliburn.Micro;
using MyProject.Core;
using MyProject.Repositories;
using MyProject.Types;
using MyProject.ViewModels.Interfaces;
namespace MyProject.ViewModels
{
public class LoginViewModel : Screen, ILoginViewModel
{
private readonly IWindowManager _windowManager;
private readonly IUnitRepository _unitRepository;
public bool IsLoginValid { get; set; }
public Unit LoggedInUnit { get; set; }
private string _password;
public string UserPassword
{
get { return _password; }
set
{
_password = value;
NotifyOfPropertyChange(() => UserPassword);
NotifyOfPropertyChange(() => CanLogin);
}
}
private string _name;
public string Username
{
get { return _name; }
set
{
_name = value;
NotifyOfPropertyChange(() => Username);
NotifyOfPropertyChange(() => CanLogin);
}
}
public LoginViewModel(IWindowManager windowManager,IUnitRepository unitRepository)
{
_windowManager = windowManager;
_unitRepository = unitRepository;
DisplayName = "MyProject - Login";
Version = ApplicationVersionRepository.GetVersion();
}
public string Version { get; private set; }
public void Login()
{
// Login logic
var credentials = new UserCredentials { Username = Username, Password=UserPassword };
var resp = _unitRepository.AuthenticateUnit(credentials);
if (resp == null) return;
if (resp.IsValid)
{
IsLoginValid = true;
LoggedInUnit = resp.Unit;
TryClose();
}
else
{
var dialog = new MessageBoxViewModel(DialogType.Warning, DialogButton.Ok, "Login Failed", "Login Error: " + resp.InvalidReason);
_windowManager.ShowDialog(dialog);
}
}
public bool CanLogin
{
get
{
return !string.IsNullOrEmpty(Username) && !string.IsNullOrEmpty(UserPassword);
}
}
}
}
这篇关于Caliburn.Micro是否支持PasswordBox？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
