For example, a 1040ez tax form is invalid if a user has certain kinds of income or expenses.
例如，如果用户拥有一些特定种类的收入或费用，那么1040ez纳税单是无效的。
While you may be tempted to write off these problems as user error, you should resist the temptation and plan on handling invalid form submissions gracefully.
您可能会把这些问题看成是用户错误，因此不予理会；您应该抵制诱惑，并着手处理无效的表单提交。
Thus, the user is immediately made aware that their credentials are invalid.
这样，用户马上就可以知道他们的凭证是无效的。
If the user chooses to delete, the set of selected appointments is marked as invalid in the record store.
如果用户选择删除，所选择的这组约会在记录存储中被标记为无效。
As soon as the byte codes of the agent change, the old user signature becomes invalid.
代理的字节代码一变更，旧的用户签名就变成无效的了。
Consider all the other things a user might do with the UI, such as clicking the wrong points or entering invalid values, accented characters, or unusual characters.
考虑用户对UI可能执行的所有动作，例如单击错误的位置或输入无效的值、重音字符或不常见的字符。
This means that if a user submits a form with a key that has already been used, the form submission will be considered invalid.
这意味着，如果一个用户提交一个含有已用过的密钥的表单，则该表单提交操作将被视为无效。
It's tempting to simply pass invalid literals forward to the repository, assuming that the user wanted to use the repository's special behavior for that literal, but you should not do this.
您可能希望将无效文字直接转发给存储库，并假设用户希望使用存储库对无效文字的特殊处理，但是不应该这样做。
Attempt to use either an invalid user id or an invalid password to connect.
尝试使用无效的用户ID或无效的密码进行连接。
If the parameters (or any of the participating artifacts) can be determined to be invalid early, this can save user time and preserve artifact integrity.
如果能在早期就确定参数(或者任意参与进来的工件)的无效性，就能够节省用户的时间并保持工件的完整性。
Of course, there are edge cases as well, such as if a user presses the Find word button without having entered a word, or if the user enters an invalid word.
当然，也存在一些极端的例子，比如一个用户按下了FindWord按钮但没有输入单词，或者，用户输入了一个无效的单词。
Invalid user mapping - The local or remote user id or password has changed.
无效用户映射——本地或远程用户ID或密码已改变。
This will be the page which is displayed when a user attempts to log in with invalid credentials. It can be as simple as Listing 8
这将是当用户试图用无效凭证登录时所显示的页面。
Finally, create an action for each controller called invalid and use the method to inform the user that their form submission was invalid.
最后，为每个控制器创建一个称为invalid的操作，并使用这个方法通知用户提交的表单无效。
We need to live with the distributed nature of SimpleDB, which means we will have invalid users sometimes (such as when the user has not been pushed out but the row that refers to that user has).
我们需要忍受SimpleDB的分布式特性，这意味着我们有时会得到无效的用户(例如在没有推出用户但推出了引用该用户的行的时候)。
Here, this implementation is trivial, since any user id and password will be accepted (with the single exception of the password "invalid", provided for test purposes).
在此，这个实现是不重要的，因为任何用户标识和密码都将被接受(仅有的一个例外是“invalid”密码，这是为测试目的提供的)。
The test class contains two tests: one to authenticate a valid user and another to authenticate an invalid user.
这个测试类包含两个测试：一个是鉴定一个无效用户，另一个是鉴定一个有效的用户。
Show an error message if the user id or password is invalid.
如果用户ID或者密码无效则显示一条出错信息。
This gives you some control over presentation in the event that a user manages to submit an invalid request via legitimate means.
倘若一个用户想要通过合法手段提交无效请求，这可以给您一些显示控制。
If the user enters an invalid piece of data, the application can immediately prompt the user to correct it before he submits the page.
如果用户输入无效的数据片段，应用程序可立即提示用户，在用户提交页面之前改正问题。
If any validation error occurs, it should be displayed to the user, indicating that the input is invalid.
如果产生任何验证错误，都应该向用户显示以表明输入无效。
A user may decide to consider stamps older than a certain age invalid.
用户可能会决定认为比特定期限更早的戳记是非法的。
OP authenticates user: If the user is not logged in or has an invalid session, he is asked to provide his login credentials.
OP验证用户的身份：如果用户没有登录或者用户会话无效，就要求用户提供登录凭证。
Create a new user id in your external security facility and mark this user id as invalid so that it cannot be used.
在外部安全设施中创建一个新的用户ID，并使这个用户ID无效，使之不能被使用。
Whenever your connector encounters an invalid literal in a search, it should throw an exception informing the user that this particular value cannot be searched on.
当连接器在搜索中遇到无效文字时，它应该抛出异常，通知用户不能搜索这个值。
In the case that an invalid URL mapping is used, the user is also directed to the default virtual portal.
在使用无效url映射的情况下，用户也被定向到缺省虚拟门户。
Try logging in with an invalid user name or password, and notice that an appropriate default error message appears.
尝试输入非法的用户名和密码，你会看到默认的错误信息。
In the case that an invalid URL mapping had been used, the user is directed to that "default" virtual portal as well.
对于使用无效url映射的情况，也会将用户定向到该“缺省”虚拟门户。
The command bean is instantiated and a try catch block is used to catch exceptions generated from a duplicate user, an invalid credit card, or an unauthorized credit card.
命令bean被实例化，trycatch块被用于捕捉由于重复的用户、无效的信用卡或未经认证的信用卡而产生的异常。
Automatically changes invalid file name characters to underscores or Spaces if the user enters such characters.
自动更改文件名无效字符为下划线或空格如果用户输入等字符。
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