jQuery：检查是否已存在包含某些值的表行 [英] jQuery: Check to see if table row containing certain values exists already

问题描述

我有一个jQuery脚本，可以在表中附加一行。简而言之，用户可以从下拉菜单中选择一个值，然后输入x月份数量并点击添加，这会将行附加到表格中。例如，用户追加以下行：

I have a jQuery script that appends a row to a table. In short, the user can select a value from a drop down menu, then enter in 'x' amount of months and hits 'add', which appends the row to the table. For example the following row is appended by the user:

<tr>
  <td>Some Value</td>
  <td>2</td>
</tr>

现在，如果用户再次执行相同的操作，我需要停止程序并提醒他他试图添加一个重复的值。如何 - 使用jQuery - 我可以检查以上行是否已经存在，其中第一个和第二个< td> 元素具有与数据相同的值正在尝试添加？我之所以说第一个和第二个< td> 元素的原因是因为还有其他< td> 元素该行但它们包含隐藏的字段，这些字段将新添加的数据提交到服务器端脚本，因此我希望尽可能简短且简单地验证。

Now, if the user performs the same operation again, I need to stop the procedure and alert him that he is trying to add a duplicate value. How - using jQuery - can I check to see whether or not the above row already exists, where the first and second <td> elements have the same value as the data he is trying to add? The reason I say first and second <td> elements only is because there are other <td> elements in the row but they house hidden fields which submit the newly added data to to a server side script, so I'd like to keep the validation as short and simple as possible.

如果有任何帮助，表ID为 #tblspecializations

If it is of any help, the table ID is #tblspecializations

非常感谢您的输入。

推荐答案

您或许可以使用 ：contains（） ：

You might be able to use :contains():

$('#tblspecializations tr > td:contains(Some Value) + td:contains(2)').length

- 示例

请注意，：contains（）将返回元素，如果给定的字符串匹配元素文本中的任何位置。

Be aware, though, that :contains() will return the element if the given string is matched anywhere in the text of the element.

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