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好的，让我们看看我这样做是否正确，或者我是否正在努力。

第一的。我有一个整数（0-255）的帐户级别，每个字节都设置为启用给定的功能。我正在设置对给定字节伪 XML 代码的可见性

<Button Grid.Column="0" Grid.Row="0" Name="Function" Content="Function 1" Visibility="{Binding UserLevel.Allow1 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="1" Name="Function" Content="Function 2" Visibility="{Binding UserLevel.Allow2 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="2" Name="Function" Content="Function 3" Visibility="{Binding UserLevel.Allow3 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="3" Name="Function" Content="Function 4" Visibility="{Binding UserLevel.Allow4 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="4" Name="Function" Content="Function 5" Visibility="{Binding UserLevel.Allow5 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="5" Name="Function" Content="Function 6" Visibility="{Binding UserLevel.Allow6 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="6" Name="Function" Content="Function 7" Visibility="{Binding UserLevel.Allow7 , UpdateSourceTrigger=PropertyChanged}"/>
<Button Grid.Column="0" Grid.Row="7" Name="Function" Content="Function 8" Visibility="{Binding UserLevel.Allow8 , UpdateSourceTrigger=PropertyChanged}"/>

当用户登录时，类 ProgramVar.ActiveUser 被拉出并从 PHP Soap 接口设置为当前登录的用户（工作）

class ProgramVar : INotifyPropertyChanged
{
    private User _ActiveUser;
    private Level _UserLevel;
    public User ActiveUser { get { return this._ActiveUser; } set { _ActiveUser= value; UpdateLevel(); NotifyPropertyChanged("ActiveUser "); } }
    public Level UserLevel { get { return this._UserLevel; } set { _UserLevel= value; NotifyPropertyChanged("UserLevel"); } }
    private void UpdateLevel()
    {
        UserLevel.Allow1 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 1) UserLevel.Allow1 = Visibility.Visible;
        UserLevel.Allow2 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 2) UserLevel.Allow2 = Visibility.Visible;
        UserLevel.Allow3 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 4) UserLevel.Allow3 = Visibility.Visible;
        UserLevel.Allow4 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 8) UserLevel.Allow4 = Visibility.Visible;
        UserLevel.Allow5 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 16) UserLevel.Allow5 = Visibility.Visible;
        UserLevel.Allow6 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 32) UserLevel.Allow6 = Visibility.Visible;
        UserLevel.Allow7 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 64) UserLevel.Allow7 = Visibility.Visible;
        UserLevel.Allow8 = Visibility.Collapsed; if(ActiveUser.AccountLevel & 128) UserLevel.Allow8 = Visibility.Visible;
        NotifyPropertyChanged("UserLevel");
    }
}
class User
{
  string UserName;
  string FirstName;
  int AccountLevel;
}
class Level
{
  Visibility Allow1 = Visibility.Visible;
  Visibility Allow2 = Visibility.Visible;
  Visibility Allow3 = Visibility.Visible;
  Visibility Allow4 = Visibility.Visible;
  Visibility Allow5 = Visibility.Visible;
  Visibility Allow6 = Visibility.Visible;
  Visibility Allow7 = Visibility.Visible;
  Visibility Allow8 = Visibility.Visible;
}

现在我也在阅读 IValueConverters，使用当前方法是正确的方法，还是应该在 XAML 和 CS 文件中使用 IValueConverts？

我正在使用的 Current 方法正在工作，因为当我尝试使用 IValueConvertes 时，我没有看到如何让对象返回多个 Visibilities（或其他变量，如果需要）

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1 回答 1

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你做错了很多事情......

  1. 您Level.AllowX是字段而不是属性。WPF 期望属性参与绑定。
  2. 将它们转换为属性后，AllowXsetter 应该引发 PropertyChangedNotifications（就像 in 一样ProgramVar.UserLevel）。
  3. 你NotifyPropertyChanged("ActiveUser ")有一个尾随空格！它应该是NotifyPropertyChanged("ActiveUser")。
  4. 由于您已经在设置Visibility枚举值，所以我认为您的绑定中不需要值转换器。
  5. 虽然最终创建 255 个AllowLevel字段是个坏主意！请检查如何ItemsControls使用ItemsSource值List<Visibility>！
于 2012-04-20T05:19:13.370 回答