已知在wpf中有一个button，点击后执行: Bigview bigview = new Bigview(); bigview.Show(); 现要求点击该按钮后，将bigview显示到另一个显示器上，写出所有代码和引用

要实现在WPF中点击Button后将`BigView`显示到另一台显示器上，你需要使用`PresentationSource`和`Screen`类。首先确保你的项目已经添加了对`System.Windows.Forms`和`WindowsBase`库的引用，因为这些包含`PresentationSource`和`Screen`。

以下是你需要的代码：

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Threading;
using System.Windows.Forms;
using WindowsBase;

// 假设BigView是你的窗体或UserControl
public partial class BigView : Window
{
    // ... (BigView的构造函数和其他成员)

    public void ShowOnSecondaryMonitor()
    {
        if (!PresentationSource.FromVisual(Body).TryGetDesktopPresentationalSource(out PresentationSource desktopPS))
            return; // 如果不是主屏幕，返回

        Screen secondaryScreen = Screen.AllScreens.FirstOrDefault(screen => screen.WorkingArea != desktopPS.RootBounds);
        if (secondaryScreen == null)
            return; // 没有找到可用的第二屏幕，返回

        Point locationOnSecondaryScreen = secondaryScreen.Bounds.Location;
        Size size = Body.DesiredSize;

        // 将BigView的位置移动到指定屏幕上并显示
        this.Left = locationOnSecondaryScreen.X;
        this.Top = locationOnSecondaryScreen.Y;
        this.Width = size.Width;
        this.Height = size.Height;

        // 设置焦点，使其可接受键盘输入（如果需要）
        Focus();

        // 显示窗口
        this.Show();
    }
}

<Window x:Class="YourNamespace.BigView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="BigView" Height="450" Width="800">
    <!-- ... (BigView的UI元素) -->
</Window>

<!-- 在XAML中绑定按钮的Click事件 -->
<Button Content="Show on Secondary Monitor"
        Command="{Binding Path=ShowOnSecondaryMonitorCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}" />

在你的ViewModel或者View的代码背后，你需要定义`ShowOnSecondaryMonitorCommand`，例如：

private ICommand showOnSecondaryMonitorCommand;
public ICommand ShowOnSecondaryMonitorCommand => showOnSecondaryMonitorCommand ?? 
    (showOnSecondaryMonitorCommand = new RelayCommand(() => bigview.ShowOnSecondaryMonitor()));

这里假设你已经实现了`ICommand`接口或者使用了类似`RelayCommand`之类的命令实现。