// Data类型，包含Data1和Data2属性，用来绑定
public class MyData : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private decimal data1;
        private decimal data2;
        public decimal Data1
        {
            get { return data1; }
            set
            {
                data1 = value;
                if (PropertyChanged != null)
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Data1"));
            }
        }
        public decimal Data2
        {
            get { return data2; }
            set
            {
                data2 = value;
                if (PropertyChanged != null)
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("Data2"));
            }
        }
    }
// MyDatas数据类型，用于标示集合
    public class MyDatas : ObservableCollection<MyData>
    { }

// XAML中代码
// 设置资源
    <Window.Resources>
        <local:MyDatas x:Key="MyDatas"/>   
    </Window.Resources>
// 显示数据
    <StackPanel>
        <Button Click="Button_Click">add people</Button>
        <Button Click="Button_Click_1">change comany</Button>
        <ListView ItemsSource="{StaticResource MyDatas}">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Data1" DisplayMemberBinding="{Binding Data1}"/>
                    <GridViewColumn Header="Data2" DisplayMemberBinding="{Binding Data2}"/>
                    <GridViewColumn Header="Sum" DisplayMemberBinding="{Binding ???}"/>
                </GridView>
            </ListView.View>
        </ListView>
    </StackPanel>