该产品目录被格式化为一个html表，带有可供用户添加商品到其购物车的控件。

This product catalog is formatted into an HTML table, with controls for the user to add each item to his or her shopping cart.

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现在让我们为default . aspx页面添加一个登录视图控件，用以显示其他根据用户登录产生的信息。

Now let's add a LoginView control to default.aspx that displays alternate content depending on the user's login.

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添加一个RegularExpressionValidator控件，在服务器端来验证用户输入的数据。

I have added a RegularExpressionValidator to validate user entries on the server side. It USES the following expression.

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