基本上,我有一个包含属性的用户控件的主窗口,该属性绑定到主窗口的视图模型。想法是,当用户表单中的属性更改时,通过绑定主窗口视图模型中的属性也会更改。问题在于,当用户控件具有ViewModel时,绑定将不起作用。由于我需要对控件进行ViewModel,因此需要解决为什么添加ViewModel会破坏绑定以及如何修复它的问题。欢迎提出任何建议。
public partial class Control1 : UserControl, INotifyPropertyChanged
{
public Control1()
{
InitializeComponent();
Loaded += Control1_Loaded;
}
void Control1_Loaded(object sender, RoutedEventArgs e)
{
DataContext = new Control1ViewModel();
}
public static DependencyProperty SavedStringProperty = DependencyProperty.Register(
"SavedString", typeof(string), typeof(Control1));
public string SavedString
{
get
{
return (string)GetValue(SavedStringProperty);
}
set
{
SetValue(SavedStringProperty, value);
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void FirePropChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
SavedString = "Hi";
}
}
public class MainWindowViewModel : INotifyPropertyChanged
{
private string _message = "Hi";
public string myMessage
{
get
{
return _message;
}
set
{
_message = value;
FirePropChanged("myMessage");
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void FirePropChanged(string property)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
private string _savedString;
public string SavedString
{
get
{
return _savedString;
}
set
{
_savedString = value;
FirePropChanged("SavedString");
}
}
}
在MainWindow中的xaml:
<myCtrl:Control1 SavedString="{Binding Path=SavedString, Mode=TwoWay}"/>
cs(我的 UC 视图模式):
public class Control1ViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
}