WPF备忘录（2）_.NET_编程开发_程序员俱乐部

一、WPF 中获取和设置鼠标位置

　　方法一：WPF方法

    Point p = Mouse.GetPosition(e.Source as FrameworkElement);

　　Point p = (e.Source as FrameworkElement).PointToScreen(pp);

　　　　方法二: API方法

   /// <summary>   
        /// 设置鼠标的坐标   
        /// </summary>   
        /// <param name="x">横坐标</param>   
        /// <param name="y">纵坐标</param>          

        [DllImport("User32")]

        public extern static void SetCursorPos(int x, int y);
        public struct POINT
        {
            public int X;
            public int Y;
            public POINT(int x, int y)
            {
                this.X = x;
                this.Y = y;
            }

        }

        /// <summary>   
        /// 获取鼠标的坐标   
        /// </summary>   
        /// <param name="lpPoint">传址参数，坐标point类型</param>   
        /// <returns>获取成功返回真</returns>   


        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern bool GetCursorPos(out POINT pt);


        private void Window_MouseMove(object sender, MouseEventArgs e)
        {
            POINT p = new POINT();
            if (GetCursorPos(out p))//API方法
            {
                txtStat.Text = string.Format("X:{0}   Y:{1}", p.X, p.Y);
            }
        }
 

二、 WPF中实现实时更新progressbar

　　　　　　实现实时更新ProgressBar貌似有很多方法，我搜索的很多资料都要用线程，觉得还是有点儿麻烦，最后在国外的技术论坛上看到

　　一个用代理解决的方法，下面就是我的调试过程：

private delegate void UpdateProgressBarDelegate(System.Windows.DependencyProperty dp,

Object value);

private void Process()
{
//Configure the ProgressBar
ProgressBar1.Minimum = 0;
ProgressBar1.Maximum = short.MaxValue;
ProgressBar1.Value = 0;

//Stores the value of the ProgressBar
double value = 0;

UpdateProgressBarDelegate updatePbDelegate = new UpdateProgressBarDelegate(ProgressBar1.SetValue);

//Tight Loop: Loop until the ProgressBar.Value reaches the max
do
{
value += 1;

Dispatcher.Invoke(updatePbDelegate,
System.Windows.Threading.DispatcherPriority.Background,
new object[] { ProgressBar.ValueProperty, value });

}
while (ProgressBar1.Value != ProgressBar1.Maximum);

}

 前台：

    <ProgressBar Grid.Row="1" Height="20" Width="200" Margin="0,4,0,0"   Name="ProgressBar1" HorizontalAlignment="Center"  VerticalAlignment="top"  />

效果：

方法二：使用定时器

  public Window1()
        {
            InitializeComponent();

            DispatcherTimer _mainTimer = new DispatcherTimer();
            _mainTimer.Interval = TimeSpan.FromSeconds(1);
            _mainTimer.Tick += new EventHandler(_mainTimer_Tick);
            _mainTimer.IsEnabled = true;

        }

 void _mainTimer_Tick(object sender, EventArgs e)
        {
            if (progressBar2.Value == progressBar1.Maximum)
                progressBar2.Value = 0;

            progressBar2.Value++;
        }