Silverlight drag and drop參考代碼

public partial class Page : UserControl

{bool isDragDropInEffect = false;Point pos; public Page(){    InitializeComponent();    // Loop through all the UIElements in the Canvas       // and attach Mouse Event Handlers to the Element    foreach (UIElement uiEle in CanvasParent.Children)    {        uiEle.MouseMove += new MouseEventHandler(Element_MouseMove);        uiEle.MouseLeftButtonDown += new MouseButtonEventHandler(Element_MouseLeftButtonDown);        uiEle.MouseLeftButtonUp += new MouseButtonEventHandler(Element_MouseLeftButtonUp);    }} void Element_MouseMove(object sender, MouseEventArgs e){    if (isDragDropInEffect)    {        FrameworkElement currEle = sender as FrameworkElement;        // Retrieving the item's current x and y position        double xPos = e.GetPosition(null).X - pos.X;        double yPos = e.GetPosition(null).Y - pos.Y;         // Re-position Element        currEle.SetValue(Canvas.TopProperty, yPos + (double)currEle.GetValue(Canvas.TopProperty));        currEle.SetValue(Canvas.LeftProperty, xPos + (double)currEle.GetValue(Canvas.LeftProperty));         // Reset the new position value        pos = e.GetPosition(null);    }}  void Element_MouseLeftButtonDown(object sender, MouseButtonEventArgs e){    FrameworkElement fEle = sender as FrameworkElement;    isDragDropInEffect = true;    // x and y coords of mouse pointer position    pos = e.GetPosition(null);       // Enable mouse capture on element    fEle.CaptureMouse();    // Set the cursor to 'Hand' when mouse pointer is over element    fEle.Cursor = Cursors.Hand;}  void Element_MouseLeftButtonUp(object sender, MouseButtonEventArgs e){    if (isDragDropInEffect)    {        FrameworkElement ele = sender as FrameworkElement;        isDragDropInEffect = false;        // Removes Mouse Capture from Element being dragged        ele.ReleaseMouseCapture();    }} 

}

 

這段代碼把CanvasContent裡的元素都變成可拖拽的.