C# 限制画布内的图像移动

在Windows8应用程序中，我正在画布中拖动图像。我想把那个图像绑定到画布中。我怎么做

这是我的密码：

XAML

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您已经拥有以下代码：

CompositeTransform imgTrans = image1.TransformToVisual(canvas1);
   Windows.Foundation.Point imgPoint = imgTrans.TransformPoint(new Windows.Foundation.Point());
 var imag  = (CompositeTransform)image1.RenderTransform;

    if (imgPoint.X <= 0)
    {
       imag .TranslateX -= imgPoint.X + 5;
       imag .TranslateY += e.Delta.Translation.Y;
    }

CompositeTransform imgTrans=image1.TransformToVisual（canvas1）；
Fixo.Posial.IMPGPOINT＝IMGTrANS.TrimePoT（新Windows .Frime.Posit（））；
var imag=（CompositeTransform）image1.RenderTransform；
if（imgPoint.X
private void Image_ManipulationDelta_1(object sender, ManipulationDeltaRoutedEventArgs e)
    {
        var imag = (CompositeTransform)image1.RenderTransform;
        imag.TranslateX += e.Delta.Translation.X;
        imag.TranslateY += e.Delta.Translation.Y;}

CompositeTransform imgTrans = image1.TransformToVisual(canvas1);
   Windows.Foundation.Point imgPoint = imgTrans.TransformPoint(new Windows.Foundation.Point());
 var imag  = (CompositeTransform)image1.RenderTransform;

    if (imgPoint.X <= 0)
    {
       imag .TranslateX -= imgPoint.X + 5;
       imag .TranslateY += e.Delta.Translation.Y;
    }