Javascript 防止对超级链接执行默认操作以运行AJAX
我的页面上有一个超链接Javascript 防止对超级链接执行默认操作以运行AJAX,javascript,jquery,ajax,Javascript,Jquery,Ajax,我的页面上有一个超链接 <a id="delete-file" href=""> <img border="0" src="images/delete_.png" alt="Delete File" width="20" height="20" /> </a> 我试图在单击默认操作时阻止它,而是运行一个AJAX函数。出于某种原因,当我点击它时,它只会将我带到页面顶部,而我的AJAX没有被触发。也没有控制台错误消息 有人能
<a id="delete-file" href="">
<img border="0" src="images/delete_.png" alt="Delete File" width="20" height="20" />
</a>
我试图在单击默认操作时阻止它,而是运行一个AJAX函数。出于某种原因,当我点击它时,它只会将我带到页面顶部,而我的AJAX没有被触发。也没有控制台错误消息
有人能帮我学语法吗
<!---Script to upload file link --->
<cfoutput>
<script>
$(document).ready(function() {
$('##upload-file').submit(function(event){
event.preventDefault();
$.each($('##upload')[0].files, function(i, file) {
var formData = new FormData();
formData.append('file-0', file);
ajaxUpload(formData);
});
$('##delete-file').click(function(event){
event.preventDefault();
ajaxDelete();
});
function ajaxUpload(formData) {
console.log("ajaxUpload function called");
$.ajax({
type: 'POST',
url: "actionpages/file_upload_action.cfm?ticket_id=#url.ticket_id#",
data: formData,
cache: false,
contentType: false,
processData: false,
beforeSend: function(){
$('.loader').show();
},
complete: function(){
$('.loader').hide(3000);
},
success: function(data) {
console.log("File successfully sent.");
$("##addFileResponse").append( "File successfully sent." );
PopulateFileUploadDiv();
},
error: function(data) {
console.log(data);
}
});
}
});
function ajaxDelete() {
console.log("ajaxDelete function called");
$.ajax({
type: 'POST',
url: "actionpages/delete_attachment.cfm?ticketID=#URL.ticket_id#&file_path=#filecheck.file_path#",
data: formData,
cache: false,
contentType: false,
processData: false,
beforeSend: function(){
$('.loader').show();
},
complete: function(){
$('.loader').hide(3000);
},
success: function(data) {
console.log("File successfully deleted.");
$("##addFileResponse").append( "File successfully deleted." );
PopulateFileUploadDiv();
},
error: function(data) {
console.log(data);
}
});
}
});
</script>
</cfoutput>
$(文档).ready(函数(){
$('##上传文件').submit(函数(事件){
event.preventDefault();
$.each($('##upload')[0]。文件,函数(i,文件){
var formData=new formData();
formData.append('file-0',file);
ajaxUpload(formData);
});
$(“##删除文件”)。单击(函数(事件){
event.preventDefault();
ajaxDelete();
});
函数ajaxUpload(formData){
log(“调用了ajaxUpload函数”);
$.ajax({
键入:“POST”,
url:“actionpages/file_upload_action.cfm?ticket_id=#url.ticket_id#”,
数据:formData,
cache:false,
contentType:false,
processData:false,
beforeSend:function(){
$('.loader').show();
},
完成:函数(){
$('.loader').hide(3000);
},
成功:功能(数据){
log(“文件已成功发送”);
$(“##addFileResponse”).append(“文件已成功发送”);
PopulateFileUploadDiv();
},
错误:函数(数据){
控制台日志(数据);
}
});
}
});
函数ajaxDelete(){
log(“调用了ajaxDelete函数”);
$.ajax({
键入:“POST”,
url:“actionpages/delete_attachment.cfm?ticketID=#url.ticket#id#和file#path=#filecheck.file#path#”,
数据:formData,
cache:false,
contentType:false,
processData:false,
beforeSend:function(){
$('.loader').show();
},
完成:函数(){
$('.loader').hide(3000);
},
成功:功能(数据){
log(“文件已成功删除”);
$(“##addFileResponse”).append(“文件已成功删除”);
PopulateFileUploadDiv();
},
错误:函数(数据){
控制台日志(数据);
}
});
}
});
尝试放置任何包装##delete文件(在DOM之前加载)的div来代替文档
$(document).ready(function(){
$("#wrapper-div").on("click","##delete-file",function(e){
ajaxDelete();
e.preventDefault();
});
});
如果由于冷熔合而无法使用ID,请尝试向链接添加一个类:
<a id="delete-file" href="" class="delete-btn">
这是一个很长的机会,但我认为问题是你没有逃脱所有的散列符号。请注意您的URL:
url: "actionpages/delete_attachment.cfm?ticketID=#URL.ticket_id#&file_path=#filecheck.file_path#"
url: "actionpages/file_upload_action.cfm?ticket_id=#url.ticket_id#",
您正在转义ID的哈希符号,但不在那里,因此我猜您的服务器正在对Javascript进行错误格式化,导致错误并阻止代码执行。你也应该试着重击他们
如果Id确实存在问题,那么您可以使用其他jQuery构造函数,如下所示:
好的,我对错误的假设是正确的,因为AJAX的代码超出了我的范围,所以我的AJAX调用失去了它们的唯一性。我基本上必须调整我的代码,使我的AJAX代码在我的标记中,但更重要的是,这些函数给出了唯一的名称,并从我的输出传递了唯一的数据 这是我修改后的正确代码:
<cfoutput>
<table width="50%" border="0" cellpadding="5">
<tr bgcolor="##CCCCCC">
<td width="8%"> </td>
<td width="67%" ><strong>Filename</strong></td>
<td width="18%" ><strong>Actions</strong></td>
</tr>
<cfloop query="filecheck">
<tr bgcolor="###iif(currentrow MOD 2,DE('ffffff'),DE('efefef'))#" class="btnav" onmouseover="style.backgroundColor='##FFFFCC';"
onmouseout="style.backgroundColor='###iif(currentrow MOD 2,DE('ffffff'),DE('efefef'))#'">
<td><img src="images/Paper-Clip-icon.png" alt="Attachment" /><br /></td>
<td><a href="https://#subscriber.hostName#.#subscriber.baseURL#/ticket-uploads/#filecheck.file_path#" target="_blank">#filecheck.file_path#</a>
(Record-ID #ID#)
</td>
<td>
<a id="delete-file#ID#" class="delete-btn#ID#" href="">
<img border="0" src="images/delete_.png" alt="Delete File" width="20" height="20" />
</a>
<!---Script to upload file link --->
<script>
$(document).ready(function(){
$(".delete-btn#ID#").on("click",function(e){
// ajaxDelete();
console.log("Start of prevent.");
e.preventDefault();
console.log("Calling AJAX with id of #ID#.");
ajaxDelete#ID#();
});
function ajaxDelete#ID#() {
console.log("ajaxDelete function called");
$.ajax({
type: 'POST',
url: "actionpages/delete_attachment.cfm?fileID=#filecheck.ID#&ticketID=#URL.ticket_id#&file_path=#filecheck.file_path#&techID=#url.techID#&TT=#type.TT#",
data: #filecheck.ID#,
cache: false,
contentType: false,
processData: false,
beforeSend: function(){
$('.loader').show();
},
complete: function(){
$('.loader').hide(3000);
},
success: function(data) {
console.log("File successfully deleted.");
$("##addFileResponse").append( "File successfully deleted." );
PopulateFileUploadDiv();
},
error: function(data) {
console.log(data);
$("##addFileResponse").append( "Something went wrong." );
}
});
}
});
</script>
</td>
</tr>
</cfloop><br />
</table>
</cfoutput>
文件名
行动
(记录ID#ID#)
$(文档).ready(函数(){
$(“.delete btn#ID#”)。在(“单击”上,函数(e){
//ajaxDelete();
日志(“开始预防”);
e、 预防默认值();
log(“调用id为#id#的AJAX”);
ajaxDelete#ID#();
});
函数ajaxDelete#ID#(){
log(“调用了ajaxDelete函数”);
$.ajax({
键入:“POST”,
url:“actionpages/delete_attachment.cfm?fileID=#filecheck.ID#&ticketID=#url.ticket#ID#file#path=#filecheck.file#path#&techID=#url.techID#&TT=#type.TT#”,
数据:#filecheck.ID#,
cache:false,
contentType:false,
processData:false,
beforeSend:function(){
$('.loader').show();
},
完成:函数(){
$('.loader').hide(3000);
},
成功:功能(数据){
log(“文件已成功删除”);
$(“##addFileResponse”).append(“文件已成功删除”);
PopulateFileUploadDiv();
},
错误:函数(数据){
控制台日志(数据);
$
url: "actionpages/delete_attachment.cfm?ticketID=#URL.ticket_id#&file_path=#filecheck.file_path#"
url: "actionpages/file_upload_action.cfm?ticket_id=#url.ticket_id#",
$(document.getElementById('delete-file'));
<cfoutput>
<table width="50%" border="0" cellpadding="5">
<tr bgcolor="##CCCCCC">
<td width="8%"> </td>
<td width="67%" ><strong>Filename</strong></td>
<td width="18%" ><strong>Actions</strong></td>
</tr>
<cfloop query="filecheck">
<tr bgcolor="###iif(currentrow MOD 2,DE('ffffff'),DE('efefef'))#" class="btnav" onmouseover="style.backgroundColor='##FFFFCC';"
onmouseout="style.backgroundColor='###iif(currentrow MOD 2,DE('ffffff'),DE('efefef'))#'">
<td><img src="images/Paper-Clip-icon.png" alt="Attachment" /><br /></td>
<td><a href="https://#subscriber.hostName#.#subscriber.baseURL#/ticket-uploads/#filecheck.file_path#" target="_blank">#filecheck.file_path#</a>
(Record-ID #ID#)
</td>
<td>
<a id="delete-file#ID#" class="delete-btn#ID#" href="">
<img border="0" src="images/delete_.png" alt="Delete File" width="20" height="20" />
</a>
<!---Script to upload file link --->
<script>
$(document).ready(function(){
$(".delete-btn#ID#").on("click",function(e){
// ajaxDelete();
console.log("Start of prevent.");
e.preventDefault();
console.log("Calling AJAX with id of #ID#.");
ajaxDelete#ID#();
});
function ajaxDelete#ID#() {
console.log("ajaxDelete function called");
$.ajax({
type: 'POST',
url: "actionpages/delete_attachment.cfm?fileID=#filecheck.ID#&ticketID=#URL.ticket_id#&file_path=#filecheck.file_path#&techID=#url.techID#&TT=#type.TT#",
data: #filecheck.ID#,
cache: false,
contentType: false,
processData: false,
beforeSend: function(){
$('.loader').show();
},
complete: function(){
$('.loader').hide(3000);
},
success: function(data) {
console.log("File successfully deleted.");
$("##addFileResponse").append( "File successfully deleted." );
PopulateFileUploadDiv();
},
error: function(data) {
console.log(data);
$("##addFileResponse").append( "Something went wrong." );
}
});
}
});
</script>
</td>
</tr>
</cfloop><br />
</table>
</cfoutput>