我目前正在尝试在 C# 4 中遵循 MVVM,但在绑定工作时遇到了麻烦。
从底部开始,这是我的 Property 类,它应该处理为 XAML 绑定更改的属性:
namespace Visualizer.MVVM
{
public class Property<T> : DependencyObject, INotifyPropertyChanged
{
//private T _Value;
public T Value
{
get { return (T) GetValue(ValueProperty); }
set
{
SetValue(ValueProperty, value);
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged()
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs("Value"));
}
}
public Property(T val)
{
Value = val;
}
public static readonly DependencyProperty ValueProperty =
DependencyProperty.Register("Value", typeof(T), typeof(Property<T>));
}
}
我的控件视图模型如下所示,并在 MainWindow.xaml.cs 中实例化:
public class CheckboxControlVM
{
public Property<bool> IsChecked { get; set; }
public Property<string> Name { get; set; }
public CheckboxControlVM(bool isChecked, string name)
{
IsChecked = new Property<bool>(isChecked);
Name = new Property<string>(name);
}
}
该控件没有代码隐藏,因此这里是它的 XAML:
<UserControl x:Class="Visualizer.MVVM.Checkbox"
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"
xmlns:local="clr-namespace:Visualizer.MVVM"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<StackPanel Orientation="Horizontal" x:Name="LayoutRoot">
<CheckBox IsChecked="{Binding Path=IsChecked.Value, Mode=TwoWay}"/>
<TextBlock Text="{Binding Path=Name.Value, Mode=OneWay}"/>
</StackPanel>
</UserControl>
最后,这是 MainWindow.xaml 中的绑定:
<mvvm:Checkbox DataContext="{Binding Realtime}"/>
我被困在这个问题上的时间比我应该做的要长得多,并且相当肯定这只是一个简单的问题。有任何想法吗?