这只是一个快速示例,可以帮助您入门(@Adriano 先生可能是什么意思):
RootViewModel.cs:
public class RootViewModel :INotifyPropertyChanged
{
#region Implementation of INotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged = delegate {};
private void OnPropertyChanged(string propertyName)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
#endregion
private double _x;
private double _y;
public double X
{
get { return _x; }
set
{
_x = value;
OnPropertyChanged("X");
}
}
public double Y
{
get { return _y; }
set
{
_y = value;
OnPropertyChanged("Y");
}
}
public double XY
{
get { return _x * _y; }
}
}
用户控件1.xaml:
<UserControl x:Class="WpfApplication2.UserControl1"
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"
mc:Ignorable="d"
d:DesignWidth="200">
<Grid>
<GroupBox Header="User Control">
<StackPanel>
<Label Content="Y:" />
<TextBox Text="{Binding Path=Y, UpdateSourceTrigger=PropertyChanged, FallbackValue=1}" Margin="5" />
<Button Content="Press me" Click="OnButtonClick" />
</StackPanel>
</GroupBox>
</Grid>
UserControl1.xaml.cs:
public partial class UserControl1 : UserControl
{
public UserControl1()
{
InitializeComponent();
}
private void OnButtonClick(object sender, RoutedEventArgs e)
{
var viewModel = (RootViewModel)DataContext;
var resultMessage = string.Format("{0} * {1} = {2}", viewModel.X, viewModel.Y, viewModel.XY);
MessageBox.Show(resultMessage, "X * Y");
}
}
MainWindow.xaml:
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:WpfApplication21="clr-namespace:WpfApplication2"
Title="Main Window" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel>
<Label Content="X:" />
<TextBox Text="{Binding Path=X, UpdateSourceTrigger=PropertyChanged, FallbackValue=1}" Margin="5" Height="24" />
</StackPanel>
<WpfApplication21:UserControl1 Grid.Row="1" Margin="5" />
</Grid>
MainWindow.xaml.cs:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new RootViewModel
{
X = 5,
Y = 7
};
}
}