我有一个简单的文件分区（链接作为文件名）。当我点击文件名时，运行以下javascript：
<script>
$(function () {
$(".fileSelect").click(function () {
var name = $(this).text(); //gets the name of the clicked file
var id = $(this).attr("id");// gets the id of the clicked file
$("#filehiddenid").val(id); // sets the file id, but wrongly appends
$("#fileDisplayText").val(name); //sets the display name
$("#mySelectFile").modal("hide"); //hides the modal file dialog
});
})
</script>
隐藏字段中设置的值是我文件的内部标识（数据库标识），文件名用于显示。
我的问题是，当我反复选择一个新文件时，发布表单然后选择并发布然后发布表格等等。然后将文件选择中的值附加到表单集合中，这样当我发布表单时我得到类似的东西：176,178,179， 作为值，而不仅仅是176，这是我选择的最新值。
*编辑：添加了标记* 这是标记，请忽略Razor变量，我将输入字段的id命名为与javascript匹配，在我的代码中它们是生成服务器端的：
<div class="templateSetting">
<div>
<span>
<strong>
@setting.SettingData.Name
</strong>
</span> <br />
<span>@setting.SettingData.Description</span>
<input type="hidden" id="filehiddenid" name="setting_@setting.SettingData.Alias" value="@setting.Value" />
</div>
<div>
<div style="float: left; width: 40%;">
<input type="text" style="width:545px;" id="fileDisplayText" name="meta_setting_@setting.SettingData.Alias" value="@fileName" class="form-control" /></div>
<div style="width: 60%;">
<a href="#" data-toggle="modal" title="Select File" data-target="#mySelectFile" class="btn btn-sm btn-default">Select File</a>
</div>
<div class="templatealias">@setting.SettingData.Alias</div>
<div style="clear:both;"></div>
</div>
</div>
编辑：这是整个标记，呈现：
<form action="/InteractiveApplications/EditApplication/23" id="editform" method="post" name="editform">
<section id="container">
<div id="wrapping" class="clearfix" style="padding-left:10px;width:100%;">
<div id="WorkContent">
<div class="validation-summary-valid" data-valmsg-summary="true">
<ul>
<li style="display:none"></li>
</ul>
</div>
<input data-val="true" data-val-number="The field CurrentFolderId must be a number." data-val-required="Feltet CurrentFolderId skal udfyldes." id="CurrentFolderId" name="CurrentFolderId" type="hidden" value="0">
<input data-val="true" data-val-number="The field ApplicationId must be a number." data-val-required="Feltet ApplicationId skal udfyldes." id="ApplicationId" name="ApplicationId" type="hidden" value="23">
<table style="width: 50%;padding-left: 20px;" class="tablelist">
<tbody>
<tr>
<td valign="top">
<table width="100%">
<tbody>
<tr>
<td style="width:120px;vertical-align:top;">
<label for="Name">Name</label>:
</td>
<td>
<input class="form-control" id="Name" name="Name" type="text" value="Afstemning">
</td>
</tr>
<tr>
<td style="width:120px;vertical-align:top;">
<label for="Description">Description</label>:
</td>
<td>
<textarea class="form-control" cols="20" id="Description" name="Description" rows="2">This is a poll to take when entering the library</textarea>
</td>
</tr>
<tr>
<td style="width:120px;vertical-align:top;">
<label for="Templates">Template</label>:
</td>
<td>
Simple Poll Template
</td>
</tr>
<tr>
<td style="width:120px;vertical-align:top;">
<label for="ApplicationData">Path</label>:
</td>
<td>
<input class="form-control" id="ApplicationData" name="ApplicationData" type="text" value="http://10.0.0.44:81/">
</td>
</tr>
<tr>
<td style="width:120px;vertical-align:top;">
<label for="BlockHostExit">Block host exit</label>:
</td>
<td>
<input checked="checked" data-val="true" data-val-required="Feltet Block host exit skal udfyldes." id="BlockHostExit" name="BlockHostExit" type="checkbox" value="true"><input name="BlockHostExit" type="hidden" value="false">
</td>
</tr>
</tbody>
</table>
</td>
<td valign="top" style="padding-left: 20px">
<img src="/InteractiveImages/689a492e-7e01-49cc-b0b3-57e23b621706.jpg" width="100%" style="text-align: center;max-width: 200px;"><br>
<input id="ImagePath" name="ImagePath" type="hidden" value="/InteractiveImages/689a492e-7e01-49cc-b0b3-57e23b621706.jpg"> <a style="color: gray" href="/InteractiveApplications/ChangePicture/23">
Change Picture
</a>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</section>
<div class="titleBar" style="padding-left:-10px;height:30px;border-bottom:1px solid #307AAB">
<h2> Application configuration</h2>
</div>
<div style="padding: 10px">
<div>
<div id="templateSettings" class="templateSettings">
<div class="templateSetting">
<div class="templateSettingLeading">
<strong>
Submit Text
</strong><br>
This is the text for the submit button
</div>
<div class="templateSettingInput">
<div style="width:50%;float:left;"> <input type="text" name="setting_submittext" value="qwer" class="form-control"></div>
<div class="templatealias">submittext</div>
<div style="clear:both;"></div>
</div>
</div>
</div>
<div id="templateSettings" class="templateSettings">
<div class="templateSetting">
<div class="templateSettingLeading">
<strong>
Multiple choice
</strong><br>
This determines if the poll has multiple right answers
</div>
<div class="templateSettingInput">
<input type="hidden" id="setting_ismultiplechoice" name="setting_ismultiplechoice" value="off">
<input id="ismultiplechoice" type="checkbox" name="setting_ismultiplechoice">
<div class="templatealias">
ismultiplechoice
</div>
</div>
</div>
<script>
$(document).ready(function () {
$("#checkbox_ismultiplechoice").click(function () {
var settingId = "#setting_ismultiplechoice";
var currentVal = $(settingId).val();
if (currentVal == "off") {
$(settingId).val("on");
}
else {
$(settingId).val("off");
}
});
});
</script>
</div>
<div id="templateSettings" class="templateSettings">
<script type="text/javascript">
var answerCounter = 1;
var trueFalseCounter = 0;
$(document).ready(function () {
$("#addbutton").click(function () {
answerCounter += 1;
trueFalseCounter += 1;
$("#questioninput_question").append("<div id='answer_" + answerCounter + "'>Answer: <input type='text' name='setting_question:" + answerCounter + "' value='' class='form-control' /><input type='checkbox' name='answer_setting_question:" + answerCounter + "' />This is the correct answer <input type='button' value='Delete' class='deleteButton btn btn-warning btn-xs' id='deletebutton_" + answerCounter + "'/></div>");
});
$(".templateSettingInput").on("click", ".deleteButton", function () {
if(confirm("Are you sure you want to delete this answer?"))
{
$(this).parent().remove();
}
});
});
</script>
<div class="templateSetting">
<div class="templateSettingLeading">
<strong> Question</strong>
This is the question and the answers for the poll
</div>
<div class="templatealias">
question
</div>
<div class="templateSettingInput" id="questioninput_question" style="width:50%;">
<textarea cols="40" rows="4" name="setting_question" class="form-control">werwe</textarea>
<input style="vertical-align: top" type="button" id="addbutton" value="Add answer" class="addbutton btn btn-info btn-xs navbar-btn"><br>
<div id="answer_1">
Answer:
<input type="text" name="setting_question:1" value="wer" class="form-control">
<!--<input type='checkbox' name='answer_setting_question:1' />This
is the correct answer-->
<input type="button" value="Delete" id="deletebutton_1" class="deleteButton btn btn-warning btn-xs">
</div>
</div>
</div>
</div>
<div id="templateSettings" class="templateSettings">
<div class="templateSetting">
<div class="templateSettingLeading">
<strong>
Show Answer to user
</strong><br>
determines if the user should see answers
</div>
<div class="templateSettingInput">
<input type="hidden" id="setting_showanswer" name="setting_showanswer" value="off">
<input id="showanswer" checked="'checked'" type="checkbox" name="setting_showanswer">
<div class="templatealias">
showanswer
</div>
</div>
</div>
<script>
$(document).ready(function () {
$("#checkbox_showanswer").click(function () {
var settingId = "#setting_showanswer";
var currentVal = $(settingId).val();
if (currentVal == "off") {
$(settingId).val("on");
}
else {
$(settingId).val("off");
}
});
});
</script>
</div>
<div id="templateSettings" class="templateSettings">
<div class="templateSetting">
<div>
<span>
<strong>
Background
</strong>
</span> <br>
<span>Please select a background image</span>
<input type="hidden" id="id_background" name="setting_background" value="172,201,173,175,172,178,178,,">
</div>
<div>
<div style="float: left; width: 40%;"><input type="text" style="width:545px;" id="text_background" name="meta_setting_background" value="611a756c4c3d338fc4ffcebf8b1979d6.png" class="form-control"></div>
<div style="width: 60%;">
<a href="#" data-toggle="modal" title="Select File" data-target="#mySelectFile" class="btn btn-sm btn-default">Select File</a>
</div>
<div class="templatealias">background</div>
<div style="clear:both;"></div>
</div>
</div>
<!-- Modal -->
<div class="modal fade" id="mySelectFile" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title" id="myModalLabel">Select file</h4>
</div>
<div class="modal-body">
<div class="foldertree">
<ul>
<li id="0" class="folder">
<a href="#" class="folderSelect" id="0">All</a>
<ul>
<li id="173" class="file"><a href="#" class="fileSelect" id="173">iStock_000032787140Large.jpg</a></li>
<li id="174" class="file"><a href="#" class="fileSelect" id="174">52_fordele.jpg</a></li>
<li id="175" class="file"><a href="#" class="fileSelect" id="175">11376047043_a06bed34bd_o.jpg</a></li>
<li id="177" class="file"><a href="#" class="fileSelect" id="177">DigitalSignage.png</a></li>
<li id="178" class="file"><a href="#" class="fileSelect" id="178">mediawall_search_br.jpg</a></li>
</ul>
</li>
<ul>
<li id="59" class="folder">
<a href="#" class="folderSelect" id="59">Test interactive folder</a>
<ul>
<li id="172" class="file"><a href="#" class="fileSelect" id="172">611a756c4c3d338fc4ffcebf8b1979d6.png</a></li>
</ul>
</li>
</ul>
</ul>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
<div class="templateSettingInput">
<input type="text" name="setting_background" value="172,201,173,175,172,178,178,," class="form-control">
<div class="templatealias">background sdhsdsd</div>
</div>
</div>
<script>
$(function () {
$(".fileSelect").click(function () {
var name = $(this).text();
var id = $(this).attr("id");
var elementId = 'id_background';
var elementText = 'text_background';
$("#" + elementId).val(id);
$("#" + elementText).val(name);
$("#mySelectFile").modal("hide");
});
})
</script>
</div>
</div>
</div>
</div>
</form>
答案 0 :(得分：2)
确保页面上没有其他具有相同ID的隐藏输入，并在浏览器中查看html，并在jquery修改之前验证元素上的值是否正确。
jquery id选择器（http://api.jquery.com/id-selector/）将仅选择具有该id的DOM中的第一个元素。
如果表单上有多个具有相同名称的隐藏输入元素，它们将全部发布到服务器。