sliverlght右键弹出二级菜单位置问题

[BATES]

在中间位置右键二级菜单是可以看到全部的

如果在底部右键二级菜单就会有一个选项被遮住了
主要代码在下面
大神帮帮忙。。。

 System.Windows.Controls.ContextMenu cmenu = new System.Windows.Controls.ContextMenu();

  SuperMenuItem mItemQuotaLevel1 = new SuperMenuItem() { Header = "插入定额项" };
                        mItemQuotaLevel1.IsEnabled = false;
                        cmenu.Items.Add(mItemQuotaLevel1);
                        SuperMenuItem mItemSelectQuota = new SuperMenuItem();
                        mItemSelectQuota.Header = "已有定额";
                        mItemSelectQuota.Name = "AddQuota";
                        //mItemSelectQuota.IsEnabled = false;
                        mItemQuotaLevel1.Items.Add(mItemSelectQuota);
                        mItemSelectQuota.Click += new RoutedEventHandler(mItem_Click);

                        SuperMenuItem mItemReplaceQuota = new SuperMenuItem();
                        mItemReplaceQuota.Header = "替换定额";
                        mItemReplaceQuota.Name = "ReplaceQuota";
                        mItemReplaceQuota.IsEnabled = false;
                        mItemQuotaLevel1.Items.Add(mItemReplaceQuota);
                        mItemReplaceQuota.Click += new RoutedEventHandler(mItem_Click);

                        SuperMenuItem mItemInputQuota = new SuperMenuItem();
                        mItemInputQuota.Header = "空白定额";
                        mItemInputQuota.Name = "AddInputQuota";
                        //mItemInputQuota.IsEnabled = false;
                        mItemQuotaLevel1.Items.Add(mItemInputQuota);
                        mItemInputQuota.Click += new RoutedEventHandler(mItem_Click);

                       cmenu.IsOpen = true;
                        cmenu.HorizontalOffset = e.GetPosition(null).X;
                        cmenu.VerticalOffset = e.GetPosition(null).Y;

[BATES]

大神们。。。求助啊

[BATES]

算了，曲线救国,直接调了和margin(0,0,0,25)就够了 反正也只是挡住一个