SilverLight开发入门例程

2007-11-05 10:12:18　来源:天极yesky　作者:维维点击:

Silverlight，一个跨浏览器和跨平台的插件，能在微软.NET上交付炫目的多媒体体验，和有丰富交互功能的Web应用。

　　CheckForWin()

　　这个帮助函数用来检查棋盘是否处于赢状态，如果所有的徽标都是亮或者都是暗，则玩家胜出。

private bool CheckForWin()
{
int onCount = 0; // assume no square on by default
bool checkForWin = false; // assume player did not win

// loop through all squares

    for (int i = 0; i < squares.Count; i++)
    {
        if (squares[i].Source == vistaLogoOn.Source)
            onCount++;
    }

// if all lights are on or off then player wins

    if (onCount == 0 || onCount == 25)
        checkForWin = true;
   return checkForWin;
}

// loop through all squares

    for (int i = 0; i < squares.Count; i++)
    {
        if (squares[i].Source == vistaLogoOn.Source)
            onCount++;
    }

// if all lights are on or off then player wins

    if (onCount == 0 || onCount == 25)
        checkForWin = true;
   return checkForWin;
}

　　Browser.HtmlTimer

　　我发现在Silverlight1.1中有一个HtmlTimer类。这个类没有文档记载而且是被遗弃的类。在编译后VS将会有一个提示：'System.Windows.Browser.HtmlTimer' is obsolete: '这不是一个高精度的计时器，并不适合于短间隔的动画。在未来版本里将会有个高级的计时器版本出现。

...

// use the browser's HtmlTimer to refresh background regularly
System.Windows.Browser.HtmlTimer timer = new System.Windows.Browser.HtmlTimer();
timer.Interval = 1;
timer.Enabled = true;
timer.Tick += new EventHandler(timer_Tick);

...

void timer_Tick(object sender, EventArgs e)
{
   double currentLeft = (double)background.GetValue(Canvas.LeftProperty);
   if (currentLeft <= 0)
   {
      // move background pixels over>
      background.SetValue(Canvas.LeftProperty, currentLeft + 2);
   }
   else
   {
      // reset backgrounds position
      background.SetValue(Canvas.LeftProperty, -340);
   }
}