<Window x:Class="demo.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="350" Width="525">    <StackPanel Margin="5">        <Button Margin="2" Click="showWindow">Show Window</Button>        <Button Margin="2" Click="Button_Click">Close Me</Button>        <Button Margin="2" Click="Button_Click_1">Center Me</Button>        <Button Margin="2" Click="Button_Click_2">Save Position and Size（配置文件方式）</Button>        <Button Margin="2" Click="Button_Click_3">Restore Position and Size(注册表方式)</Button>    </StackPanel></Window>

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace demo{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        private void showWindow(object sender, RoutedEventArgs e)        {            TaskWindow winTask = new TaskWindow();            //ShowDialog()表示以模态方式打开，必须关闭此窗口后才能操作其他窗口            winTask.ShowDialog();        }        private void Button_Click(object sender, RoutedEventArgs e)        {            this.Close();        }        //设置窗口位置为工作区的中央        private void Button_Click_1(object sender, RoutedEventArgs e)        {            double screenHeight = SystemParameters.WorkArea.Height;            double screenWidth = SystemParameters.WorkArea.Width;            this.Top = (screenHeight - this.Height) / 2;            this.Left = (screenWidth - this.Width) / 2;        }        private void Button_Click_2(object sender, RoutedEventArgs e)        {            //WindowPositionHelper（注册表的方式保存窗体的位置和大小）            //WindowPositionHelperConfig（配置文件的方式保存窗体的位置和大小）            WindowPositionHelper.SaveSize(this);        }        private void Button_Click_3(object sender, RoutedEventArgs e)        {            //WindowPositionHelper（注册表的方式保存窗体的位置和大小）            //WindowPositionHelperConfig（配置文件的方式保存窗体的位置和大小）            WindowPositionHelper.SetSize(this);        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using Microsoft.Win32;namespace demo{    //WindowPositionHelper（注册表的方式保存窗体的位置和大小）    public  class WindowPositionHelper    {        public static string RegPath = @"Software\MyApp";        public static void SaveSize(Window win)        {            RegistryKey key;            key = Registry.CurrentUser.CreateSubKey(RegPath + win.Name);            key.SetValue("Bounds", win.RestoreBounds.ToString(System.Globalization.CultureInfo.InvariantCulture));        }        public static void SetSize(Window win)        {            RegistryKey key;            key = Registry.CurrentUser.OpenSubKey(RegPath + win.Name);            if (key != null)            {                Rect rect = Rect.Parse(key.GetValue("Bounds").ToString());                win.Top = rect.Top;                win.Left = rect.Left;                if (win.SizeToContent == SizeToContent.Manual)                {                    win.Width = rect.Width;                    win.Height = rect.Height;                }            }        }    }    //WindowPositionHelperConfig（配置文件的方式保存窗体的位置和大小）    public class WindowPositionHelperConfig    {        public static void SaveSize(Window win)        {            Properties.Settings.Default.WindowPosition = win.RestoreBounds;            Properties.Settings.Default.Save();        }        public static void SetSize(Window win)        {            Rect rect = Properties.Settings.Default.WindowPosition;            win.Top = rect.Top;            win.Left = rect.Left;            if (win.SizeToContent == SizeToContent.Manual)            {                win.Width = rect.Width;                win.Height = rect.Height;            }        }    }}