<Window x:Class="WPF熊俊.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    

        xmlns:local="clr-namespace:WPF熊俊" 

        Height="550" Width="600" Name="ddd">

    <Window.Resources>

        <local:Number Number1="8" Number2="2" x:Key="number" />

        <local:NumberConverter x:Key="转换器1" />

    </Window.Resources>

    <Grid HorizontalAlignment="Left" Height="405" VerticalAlignment="Top" Width="533">

        <TextBlock Name="textblock1" DataContext="{StaticResource number}">

            <TextBlock.Text>

                <MultiBinding Converter="{StaticResource 转换器1}"  ConverterParameter="减一下" Mode="TwoWay">

                    <Binding Path="Number1"/>

                    <Binding Path="Number2"/>

                </MultiBinding>

            </TextBlock.Text>

        </TextBlock>

        <Button Content="Button" HorizontalAlignment="Left" Height="58" Margin="161,423,0,-76" VerticalAlignment="Top" Width="68" Click="Button_Click"/>

    </Grid>

</Window>

private void Button_Click(object sender, RoutedEventArgs e)

{

    textblock1.Text = "张三";

    Number m = this.FindResource("number") as Number;

    MessageBox.Show(m.Number1.ToString());

}

class Number

{

    public int Number1 { get; set; }

    public int Number2 { get; set; }

}

class NumberConverter : IMultiValueConverter  

{

    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)  //返回值即作为目标属性值

    {

        string number;

        switch ((string)parameter)

        {

            case "乘一下":

                number = ((Int32)values[0] * (Int32)values[1]).ToString(); //相乘