https://stackoverflow.com/questions/20363100/wpf-popup-location-issue

wpf popup在部分设备上定位错误 win10popup显示位置错误_Software

HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows

REG_SZ: MenuDropAlignment

Value: 0 means to the right

Value: 1 means to the left

打开注册表显示的是1,改成0以后定位就正常了