javascript JQuery 找不到我的元素。为什么？
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JQuery can't find my Element. Why?
提问by egucciar
UPDATE: Silly me didn't notice that the CASE wasn't exact. I was struggling with this for 30+ minutes, and you guys saw my problem in less than 5!! thanks for saving me a lot of grief - I'm kind of new to programming anyway,I need to learn how to look out for little things like this, but thanks so much, it had not even crossed my mind:)
更新：愚蠢的我没有注意到 CASE 不准确。我为此苦苦挣扎了 30 多分钟，你们不到 5 分钟就看到了我的问题！！感谢您为我省去了很多悲伤 - 无论如何，我对编程有点陌生，我需要学习如何注意这样的小事，但非常感谢，我什至没有想到它:)
Sorry everyone - It was misleading before because I forgot to put quotes in my question, but I can assure you I know that the selector for Jquery requires quotes and I've been using them...
对不起大家 - 之前这是误导，因为我忘记在我的问题中加上引号，但我可以向你保证我知道 Jquery 的选择器需要引号并且我一直在使用它们......
<div id='question' style="background-color:#DAE2E8;border-color:#A2B3C7;border-width:1px;border-style:solid"><br />
<table id='searchtable' border='0'>
<tr>
<td><span class="label">Question ID:</span><input id='QuestionId' type='text'/></td>
<td><span class="label">Question Title:</span><input id='QuestionTitle' type='text'/></td>
<td><span class="label">Original URL:</span><input id='OriginalURL' type='text'/></td>
<td><span class="label">Original Title:</span><input id='OriginalTitle' type='text' /></td>
<td><span class="label">Chronic ID:</span><input id='ChronicID' type='text' /></td>
</tr><tr>
<td><span class="label">Expert Name:</span><input id='ExpertName' type='text'/></td>
<td><span class="label">Topic ID:</span><input id='TopicID' type='text'/></td>
<td><span class="label">Channel ID:</span><input id='ChennelID' type='text''/></td>
<td><span class="label">Funded: </span><input id='IsFunded' type='text'/></td>
<td><span class="label">Funded Partner:</span><input id='FundedPartner' type='text'/></td>
</tr><tr>
<td><input type="submit" value="Submit" onclick='ApplyNewFilters(this)' /></td>
</tr>
</table>
</div>
So here is my HTML code (its in an aspx page) - I tried using $("#QuestionID").val()to get the value, but it won't work. I also tried $("input#QuestionID").val().
所以这是我的 HTML 代码（它在一个 aspx 页面中） - 我尝试使用它$("#QuestionID").val()来获取值，但它不起作用。我也试过了$("input#QuestionID").val()。
回答by RedFilter
回答by Shyju
Are you sure you are using the correct case ?
您确定您使用的是正确的大小写吗？
$("#QuestionId").val()should work
$("#QuestionId").val()应该管用
If it is not working, go and check your firebug console tab to see whether there is some script error in the page
如果它不起作用，请检查您的 firebug 控制台选项卡以查看页面中是否存在某些脚本错误
回答by Darren
the input id is QuestionId not QuestionID
输入 id 是 QuestionId 不是 QuestionID
回答by everton
The selectors are case-sensitive, so you've mispelled the "Id"
选择器区分大小写，所以你拼错了“Id”
$("#QuestionId").val()
Should work.
应该管用。
回答by Cristian Lupascu
Try correcting the double quote at the line
尝试更正该行的双引号
<input id='ChennelID' type='text''/>
回答by chepe263
look
看
<td><span class="label">Channel ID:</span><input id='ChennelID' type='text''/></td>
and this
还有这个
<td><span class="label">Channel ID:</span><input id='ChennelID' type='text' /></td>
you have and extra ' at the end
你在最后有额外的 '
in case you are using
如果您正在使用
<asp:TextBox />
you must create a var on javascript with the value of the asp client id
您必须使用 asp 客户端 ID 的值在 javascript 上创建一个 var
var ChannelID = <%=txtChannelID.ClientID %>
where clientid is the text box name
其中 clientid 是文本框名称
回答by jmoerdyk
You're missing the quote marks on your selectors. It should be $('#QuestionId').val()or $('input#QuestionId').val()
您缺少选择器上的引号。它应该是$('#QuestionId').val()或$('input#QuestionId').val()
