Question

我正在进入WPF，来自Winforms背景，我使用groupbox来显示和隐藏“面板”，具体取决于点击的菜单选项。这在设计时有一个噩梦，有多个重叠的组框。

WPF能解决这个问题吗？群组盒还有可行吗？或者有更好的解决方案吗？

Answer 1

WPF GroupBox上有一个名为“Visibility”的属性（继承自UIElement），可以通过绑定在View Model中控制。

此Xaml片段显示GroupBox的可见性绑定到名为“MyGroupBoxVisibility”的属性...

<Grid>
    <GroupBox Header="This and that" Visibility="{Binding MyGroupBoxVisibility}" Background="Plum"/>
</Grid>

包含“MyGroupBoxVisibility”的示例视图模型是......

public class ViewModel : INotifyPropertyChanged
{
    public ViewModel()
    {
        HideTheGroupBox();
    }
    private void ShowTheGroupBox()
    {
        MyGroupBoxVisibility = Visibility.Visible;
    }
    private void HideTheGroupBox()
    {
        MyGroupBoxVisibility = Visibility.Collapsed;
    }
    private Visibility _myGroupBoxVisibility;
    public Visibility MyGroupBoxVisibility
    {
        [DebuggerStepThrough]
        get { return _myGroupBoxVisibility; }
        [DebuggerStepThrough]
        set
        {
            if (value != _myGroupBoxVisibility)
            {
                _myGroupBoxVisibility = value;
                OnPropertyChanged("MyGroupBoxVisibility");
            }
        }
    }
    #region INotifyPropertyChanged Implementation
    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string name)
    {
        var handler = System.Threading.Interlocked.CompareExchange(ref PropertyChanged, null, null);
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(name));
        }
    }
    #endregion
}

此示例中包含两种方法，可以来回切换可见性。您可以使用此技术将WinForms内容传输到WPF中，并将其保留在MVVM中。

ETA：请注意，理解折叠和隐藏可见性之间的区别至关重要。有关说明，请参阅http://msdn.microsoft.com/en-us/library/system.windows.visibility(v=vs.110).aspx

组合框的替代方案？

1 个答案: