.Net Mirco Framework 2007技术大会

2006年在《程序员》杂志上通过看马宁的专栏文章，第一次知道了.Net MF。一年后的今天终于近距离地接触了.Net Mirco Frmaework，对MF有了一定的感性认识。

最近公司很多项目都有大量嵌入式设备使用，由于WinCE系统相对较大，对硬件平台要求过高，所以对.Net MF一直比较关注。今天总算大开眼界了。

微软公司的Colin Miller和Digi公司的John Leier在上午的演讲拉开了.Net MF序幕，针对嵌入式领域，一个从软件角度进行阐述，另一个从硬件平台角度进行呼应，一软一硬，二者强强联合，恐怕未来嵌入式智能设备一半以上的项目开发要被其收入囊中了。下午的中文演讲给人感觉有些干瘪，两三个演讲，平均短短十几分钟就草草收场。后来微软公司杜伟的演讲，从VS2005一行行难以看清的代码，到一个个令人惊艳的样例把MF开发技术推向最前台。

Digi公司很是有魄力，免费送出15套开发套件（5个作为回答问题的奖品，10个抽奖），自己即没有回答问题的勇气，也没有好的运气，只好剩下羡慕的份了。

最后为每个人送出的1G优盘（类似微软今年MVP大礼包中的优盘）很有分量，不仅是1G的容量，并且里面竟然把所有的幻灯片拷贝其中，更没有想到的是，MF 的SDK也在里面，真棒！

回到家迫不及待装了一份MF SDK（MicroFrameworkSDK.MSI 区区只有5998 kb，强！），有模拟器，也有示例。

其中几个示例不知道为什么编译成功，就是运行失败，对第二示例比较感兴趣，可以绘制图形，并且可以贴图。

相关代码如下：

// Copyright (C) Microsoft Corporation.  All rights reserved.using System;using System.Collections;using System.Threading;using Microsoft.SPOT;using Microsoft.SPOT.Input;using Microsoft.SPOT.Hardware;using Microsoft.SPOT.Presentation;using Microsoft.SPOT.Presentation.Media;using Microsoft.SPOT.Presentation.Controls;using Microsoft.SPOT.Presentation.Shapes;using PresentationDemo;//public sealed class MyApp : Application {// This static field prevents the object from being GC'dprivate static GpioButtonInputProvider s_gpioInputProvider;public Font NinaBFont;public Font SmallFont;public Bitmap Snowflake;private MyApp() {// Initialize the Buttons/Pins dispatchers_gpioInputProvider = new GpioButtonInputProvider(this.Dispatcher, null);// Load some resourcesNinaBFont = Resources.GetFont(Resources.FontResources.NinaBFont);SmallFont = Resources.GetFont(Resources.FontResources.SmallFont);Snowflake = Resources.GetBitmap(Resources.BitmapResources.Snowflake);}protected override void OnStartup(EventArgs e) {// Create and set the application's main windowthis.MainWindow = new MainMenuWindow(this);base.OnStartup(e);}public void GoHome() {Buttons.Focus(this.MainWindow); // Set focus back to the main window}public static void Main() {new MyApp().Run();   // Start the app's main window}}//// This is the base class of all our windows; it makes every window visible,// sets the window's size to the full size of the LCD, and give the window focusinternal class PresentationWindow : Window {protected MyApp m_app;protected PresentationWindow(MyApp app) {m_app = app;// Make the window visible and the size of the LCDthis.Visibility = Visibility.Visible;this.Width = SystemMetrics.ScreenWidth;this.Height = SystemMetrics.ScreenHeight;Buttons.Focus(this); // Set focus to this window}protected override void OnButtonDown(ButtonEventArgs e) {// Remove this window form the Window Managerthis.Close();// When any button is pressed, go back to the Home pagem_app.GoHome();}}//internal sealed class MainMenuWindow : PresentationWindow {private ListBox m_listbox;public ListBox MainListBox { get { return m_listbox; } }public MainMenuWindow(MyApp app): base(app) {Color instructionTextColor = ColorUtility.ColorFromRGB(192, 192, 192);Color backgroundColor = ColorUtility.ColorFromRGB(26, 118, 183); Color unselectedItemColor = ColorUtility.ColorFromRGB(192, 192, 255);   // Unselected listbox item colorColor selectedItemColor = Colors.White;                                 // Selected listbox item color// The Main window contains a veritcal StackPanelStackPanel panel = new StackPanel(Orientation.Vertical);this.Child = panel;// The top child contains text with instructionsTextFlow textflow = new TextFlow();textflow.TextAlignment = TextAlignment.Center;textflow.Visibility = Visibility.Visible;textflow.TextRuns.Add(new TextRun(Resources.GetString(Resources.StringResources.SelectAnItemFromBelow),app.NinaBFont, instructionTextColor));panel.Children.Add(textflow);// Add a blank line to the stackpanel.Children.Add(textflow = new TextFlow());textflow.TextRuns.Add(" ", app.NinaBFont, instructionTextColor);textflow.Visibility = Visibility.Visible;// The next child contains a listbox with optionsm_listbox = new ListBox();// Prepare the listboxButtons.Focus(m_listbox);panel.Children.Add(m_listbox);this.Background = m_listbox.Background = new SolidColorBrush(backgroundColor);m_listbox.SelectionChanged += delegate(Object sender, SelectionChangedEventArgs e) {Int32 previousSelectedIndex = e.PreviousSelectedIndex;if (previousSelectedIndex != -1) {  // If there was a previous index// Change previously-selected listbox item color to unselected color((Text)m_listbox.Items[previousSelectedIndex].Child).ForeColor = unselectedItemColor;}// Change newly-selected listbox item color to selected color((Text)m_listbox.Items[e.SelectedIndex].Child).ForeColor = selectedItemColor;};// Add the items to the listboxforeach (String s in new String[] { "Vertical Stack", "Horizontal Stack", "Canvas", "Diagonal" }) {Text text = new Text(m_app.NinaBFont, s + " Panel Demo");text.ForeColor = unselectedItemColor;text.TextAlignment = TextAlignment.Center;text.Width = this.Width;ListBoxItem lbi = new ListBoxItem();lbi.Background = m_listbox.Background;lbi.Child = text;m_listbox.Items.Add(lbi);}m_listbox.SelectedIndex = 0;// Add a blank line in the stackpanel.Children.Add(textflow = new TextFlow());textflow.TextRuns.Add(" ", app.NinaBFont, instructionTextColor);textflow.Visibility = Visibility.Visible;// The bottom child contains text with return instructionstextflow = new TextFlow();textflow.TextAlignment = TextAlignment.Center;textflow.Visibility = Visibility.Visible;textflow.TextRuns.Add(new TextRun("(After viewing a Panel Demo, hit Enter to return to this screen)",app.NinaBFont, instructionTextColor));panel.Children.Add(textflow);}protected override void OnButtonDown(ButtonEventArgs e) {// If <Enter> button is pressed, go into the selected demoif (e.Button == Button.Select) {switch (MainListBox.SelectedIndex) {case 0:  // Vertical Stack Panel Demonew StackPanelDemo(m_app, Orientation.Vertical);break;case 1:  // Horizontal Stack Panel Demonew StackPanelDemo(m_app, Orientation.Horizontal);break;case 2:  // Canvas Panel Demonew CanvasPanelDemo(m_app);break;case 3:  // Diagonal Panel Demonew DiagonalPanelDemo(m_app);break;}}// Don't call base implementation (base.OnButtonDown) or we'll go back Home}protected override void OnGotFocus(FocusChangedEventArgs e) {// Whenever this window gets focus, it gives it to its listboxButtons.Focus(m_listbox);base.OnGotFocus(e);}}//internal sealed class StackPanelDemo : PresentationWindow {// This class shows how to build your own shape drawing in a DrawingContextprivate sealed class Cross : Shape {public Cross() { }public override void OnRender(DrawingContext dc) {// Draw a line from top, left to bottom, rightdc.DrawLine(base.Stroke, 0, 0, Width, Height);// Draw a line from top, right to bottom, leftdc.DrawLine(base.Stroke, Width, 0, 0, Height);}}public StackPanelDemo(MyApp app, Orientation orientation): base(app) {StackPanel panel = new StackPanel(orientation);this.Child = panel;panel.Visibility = Visibility.Visible;Shape[] shapes = new Shape[] {new Ellipse(),new Line(),new Polygon(new Int32[] { 0, 0,    50, 0,    50, 50,    0, 50 }), // A Squarenew Rectangle(),new Cross() // Our own custom shape};for (Int32 x = 0; x < shapes.Length; x++) {Shape s = shapes[x];s.Fill = new SolidColorBrush(ColorUtility.ColorFromRGB(0, 255, 0));s.Stroke = new Pen(Color.Black, 2);s.Visibility = Visibility.Visible;s.HorizontalAlignment = HorizontalAlignment.Center;s.VerticalAlignment = VerticalAlignment.Center;s.Height = Height - 1;s.Width = Width - 1;if (panel.Orientation == Orientation.Horizontal)s.Width /= shapes.Length;elses.Height /= shapes.Length;panel.Children.Add(s);}}}//internal sealed class CanvasPanelDemo : PresentationWindow {public CanvasPanelDemo(MyApp app): base(app) {Canvas canvas = new Canvas();this.Child = canvas;this.Background = new SolidColorBrush(ColorUtility.ColorFromRGB(0, 255, 255));for (Int32 x = 0; x < Width; x += Width / 4) {for (Int32 y = 0; y < Height; y += Height / 4) {Text text = new Text(m_app.SmallFont, " (" + x + "," + y + ")");Canvas.SetLeft(text, x);Canvas.SetTop(text, y);canvas.Children.Add(text);}}}}//internal sealed class DiagonalPanelDemo : PresentationWindow {public DiagonalPanelDemo(MyApp app): base(app) {DiagonalPanel panel = new DiagonalPanel();this.Child = panel;this.Background = new LinearGradientBrush(ColorUtility.ColorFromRGB(192, 0, 0), ColorUtility.ColorFromRGB(32, 0, 0), 0, 0, Width, Height);for (Int32 x = 0; x < 4; x++) {Bitmap b = new Bitmap(Width / 4, Height / 4);b.StretchImage(0, 0, app.Snowflake, b.Width, b.Height, (UInt16)((x + 1) * 50));Image image = new Image(b);panel.Children.Add(image);}}// This class shows how to build your own Panelprivate sealed class DiagonalPanel : Panel {public DiagonalPanel() {}protected override void MeasureOverride(int availableWidth, int availableHeight, out int desiredWidth, out int desiredHeight) {// Called to calculate the width/height desireddesiredWidth = 0;desiredHeight = 0;foreach (UIElement child in Children) {if (child.Visibility != Visibility.Collapsed) {child.Measure(Int32.MaxValue, Int32.MaxValue);Int32 childWidth, childHeight;child.GetDesiredSize(out childWidth, out childHeight);desiredWidth += childWidth;desiredHeight += childHeight;}}}protected override void ArrangeOverride(int arrangeWidth, int arrangeHeight) {Int32 x = 0, y = 0;foreach (UIElement child in Children) {if (child.Visibility != Visibility.Collapsed) {Int32 childWidth, childHeight;child.GetDesiredSize(out childWidth, out childHeight);child.Arrange(x, y, childWidth, childHeight);x += childWidth;y += childHeight;}}}}}

稿件来源：阿里云开发者社区

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