Question

好的，让我看看我做得对，或者我是在努力做到这一点。

首先。我有一个整数（0-255）的帐户级别，每个字节设置为启用给定的功能。我正在努力设置给定字节的可见性 Psudo XML代码

<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，会将类ProgramVar.ActiveUser拉出并设置为当前从PHP Soap界面登录的用户（正常工作）

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＆amp;中使用IValueConverts？ CS文件？

我正在使用的当前方法正在工作，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（或者如果需要还有其他可用性）

Answer 1

有些事情你做错了......

您的Level.AllowX字段不是属性。 WPF希望属性参与绑定。
将它们转换为属性后，AllowX setter应该引发PropertyChangedNotifications（就像在ProgramVar.UserLevel中一样）。
您的NotifyPropertyChanged("ActiveUser ")有一个尾随空格！它应该是NotifyPropertyChanged("ActiveUser")。
由于您已经设置了Visibility枚举值，因此我认为您的绑定中不需要值转换器。
虽然最终创建了255个AllowLevel字段但不是一个好主意！请检查ItemsControls和ItemsSource如何使用List<Visibility>值！

复杂的绑定将INT转换为多个WPF可见性

1 个答案: