Move事件，拖动控件的有关问题，内附代码，请大家帮帮忙吧~

public Point mouseStart , mouseEnd;//记录鼠标的起始点，来计算移动位置
public void MouseLeftDown( object sender , EventArgs e )
        {
            mouseStart=Mouse.GetPosition( this );
        }
        public void Move( object sender , EventArgs e )
        {
            mouseEnd=Mouse.GetPosition( this );
            double y=mouseEnd.Y-mouseStart.Y;
            //Menumain 是用户控件，grid是容器
            Menumain menu=grid.Children[1] as Menumain;
            DB.DB.timeSpan=0;
            items item=null;
            if ( y!=0 )
            {
                for ( int i=0 ; i<menu.sdf.Length ; i++ )
                {
                    item=menu.sdf[i] as items;

                    if ( item.Margin.Top+y>=336 && item.Margin.Top+y<=528.5 )
                    {
                        storyTapMove( item , 216 , item.Margin.Top+menuSlidePointY( item.Margin.Top , i , y ) , DB.DB.timeSpan );
                        DB.DB.NowIng=i+1;//这个是记录中心位置的
                        
                    }
                    else
                    {
                       
                        storyTapMove( item , 240, item.Margin.Top+menuSlidePointY( item.Margin.Top , i , y ) , DB.DB.timeSpan );
                                            }
                }

            }

        }


#region 返回控件应移动的距离（正常值和特殊值的正常比例）
        /// <summary>
        /// 返回控件应移动的距离（正常值和特殊值的正常比例）
        /// </summary>
        /// <param name="top"></param>
        /// <param name="i"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        public float menuSlidePointY( double top , int i , float y )
        {
            float temp=y/70;
            if ( top>382 &&top <675 )
            {
                return 293*temp;
            }
            else if ( top<382 && top>290 )
            {
                return 92*temp;
            }
            return y;
        } 
        #endregion


#region Thickness移动主菜单动画(按margin移动)
        /// <summary>
        /// Thickness移动主菜单动画(按margin移动)
        /// </summary>
        /// <param name="item">移动控件</param>
        /// <param name="setLeft">控件靠左侧宽度</param>
        /// <param name="setTop">控件靠顶部宽度</param>
        public void storyTapMove( items item , double setLeft , double setTop , int timeSpan )
        {
            Storyboard sb = new Storyboard( );
            //sb.FillBehavior = FillBehavior.Stop;
            //item.BeginStoryboard( sb , HandoffBehavior.SnapshotAndReplace , true );

            TransformGroup tfg = new TransformGroup( );
            ScaleTransform sf = new ScaleTransform( );
            SkewTransform qx = new SkewTransform( );
            RotateTransform xz = new RotateTransform( );
            TranslateTransform py = new TranslateTransform( );

            tfg.Children.Add( sf );
            tfg.Children.Add( qx );
            tfg.Children.Add( xz );
            tfg.Children.Add( py );

            ThicknessAnimationUsingKeyFrames animatX=new ThicknessAnimationUsingKeyFrames( );

            SplineThicknessKeyFrame sk=new SplineThicknessKeyFrame( new Thickness( setLeft , setTop , 0 , 0 ) , KeyTime.FromTimeSpan( new TimeSpan( 0 , 0 , 0 , 0 , timeSpan ) ) , new KeySpline( 0.37 , 1 , 1 , 1 ) );

            animatX.KeyFrames.Add( sk );
            
            Storyboard.SetTarget( animatX , item );
            Storyboard.SetTargetProperty( animatX , new PropertyPath( "(FrameworkElement.Margin)" ) );

            sb.Children.Add( animatX );
            sb.Begin( );
        }
        #endregion