理解wp中控件与窗口关系

[Vincent-DEVDIV]

由于wp中把相关api给阉割掉了，所以本文以wpf为例，说明控件与窗口的关系，便于大家的理解。
1. 在xaml中定义两个控件

<Window x:Class="WpfApplication1.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" Loaded="Window_Loaded_1">
    <Grid Name="grid1">
        <Button Content="hello" Name="button1"/>
    </Grid>
</Window>

第二步后台获取他们对应的窗口句柄

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded_1(object sender, RoutedEventArgs e)
        {
            HwndSource gridwin = (HwndSource)HwndSource.FromVisual(grid1);
            IntPtr handle1 = gridwin.Handle;


            HwndSource buttonwin = (HwndSource)HwndSource.FromVisual(button1);
            IntPtr handle2 = buttonwin.Handle;

            WindowInteropHelper windowHwnd = new WindowInteropHelper(this);
            IntPtr handle3 = windowHwnd.Handle;
        }
    }
}

3. 调试可知，这几个控件对应的窗口句柄是相同的，也就是说
wpf中控件和窗口没有一一对应关系，而是各个控件最后绘制到一个窗口中去。。。

Regards
Vincent
http://weibo.com/xueyw