002使用代码和未经编译的XMAL文件创建WPF程序

1.创建一个名为Window1.xaml的文件

内容

<DockPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
    <Button Name="button1" Margin="60">Please click me. </Button>
</DockPanel>

2.创建1个窗口Window1.xaml.cs

内容

using System.Windows;
using System.IO;
using System.Windows.Markup;
using System.Windows.Controls;

namespace WpfApp2
{
    /// <summary>
    /// Window1.xaml 的交互逻辑
    /// </summary>
    public partial class Window1 : Window
    {
        private Button myButton;
        public Window1()
        {
            InitializeComponent();
        }
        public Window1(string xamlFile)
        {
            //设置窗体
            this.Width = this.Height = 300;
            this.Left = this.Top = 100;
            this.Title = "Dynamical loaded XAML";

            //从一个XAML文件里获取XAML内容
            DependencyObject rootElement;
            using(FileStream fs = new FileStream(xamlFile,FileMode.Open)) //文件流
            {
                rootElement = (DependencyObject)XamlReader.Load(fs);//加载文件流
            }
            this.Content = rootElement;

            myButton = (Button)LogicalTreeHelper.FindLogicalNode(rootElement, "button1");
            myButton.Click += myButton_Click;
        }
        private void myButton_Click(object sender, RoutedEventArgs e)
        {
            myButton.Content = "Thank You";
        }
    }
}

3.创建一个启动类Program

内容：

using System;
using System.Windows;
namespace WpfApp2
{
    class Program:Application
    {
        [STAThread()]//指定应用程序的COM线程模型是单线程单元（sta）
        static void Main()
        {
            Program app = new Program();//新建一个program类
            app.MainWindow = new Window1 ("Window1.xaml");//
            app.MainWindow.ShowDialog();//open a window
        }
    }
}