如何在动态创建的输入类型“文件”上触发点击事件？

Question

I am attempting to add an input of type 'file' to a form dynamically. Actually the end user can add as many files as they would like to a form, so an array concept is needed. I can inject dynamic elements, but I can't figure out how to dynamically invoke the click of the input element just injected. Also, need to remove the dynamic element if the user chooses cancel on the input element.

I have created a jsfiddle showing the injection but the click event never fires when the trigger is run.

How do I trigger the 'click' event after injecting this element?

jsFiddle Html

<input id='button1' type='button' value='button1'>
<div class='container'>

</div>

jsFiddle JavaScript

$(document).ready(function () {
    $('#button1').on('click', function(event) {
    Button1_Click(event);
  });
});

function Button1_Click(event) {
    var container = $('.container');
  var containerChildren = $(container).children();
  var containerChildrenCount = $(containerChildren).length;
  var inputId = 'fileInput[' + containerChildrenCount + ']';
    $('.container').append('<input id="' + inputId + '" type="file" />');
  $('#' + inputId).trigger('click');
}

Answer 1

Try removing the [] from the inputId variable.

I got it to work in your fiddle by changing it to this

var inputId = 'fileInput-' + containerChildrenCount