Within this article, learn how to build an update panel control that dynamically retrieves content asynchronously from the server, based on user events.
在本文中，学习如何构建一个更新面板控件，该控件可以根据用户活动动态地从服务器异步检索内容。
Sometimes you just need a "second source"; a Web-based control panel for your Web server makes your system too fragile.
有时候，您只是需要“另一个源”；Web服务器的基于Web的控制面板会使系统太脆弱。
A modem has not been detected on your server. Please verify its installation in modem Control Panel before continuing.
在服务器上未检测到调制解调器。继续以前，请在“控制面板”的“调制解调器”中验证其安装。
When you find a ContentPlaceHolder control (or a server control) cut and paste it into that hidden panel.
每找到一个ContentPlaceHolders控件(或者一个服务器控件)，剪切并粘贴到刚刚添加的隐藏面板中。
A modem has not been detected on your server. Please verity its installation in modem Control Panel before continuing.
在服务器上未检测到调制解调器。继续以前，请在“控制面板”的“调制解调器”中验证其安装。
A modem has not been detected on your server. Please verity its installation in modem Control Panel before continuing.
在服务器上未检测到调制解调器。继续以前，请在“控制面板”的“调制解调器”中验证其安装。
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