问题
im wondering if i can make a group of control that will stay on screen even someone on another webpage while my webpage open in another tab,in asp.net.Like winform's topmost feature.
回答1:
No, you can not do this.
If you're expecting to port a winforms application to webforms feature for feature, you're going to be greatly disappointed. WebForms is still just a thin veneer over the http protocol; one that tends to peel up at the corner.
If you're trying to keep something on top via the web, you can't do that without a plugin, no matter what web platform you use.
来源：https://stackoverflow.com/questions/28754276/do-asp-net-webform-controls-have-topmost-feature-like-winforms-controls-do