当我选中一个复选框(相同的类)并将值插入文本框中时,该如何选中另一个复选框

时间:2019-05-03 08:27:20

标签: javascript jquery html

我有一个具有相同类的复选框,基本上它的作用是,如果我选中该复选框,它将检查与该复选框相同的类,并返回值。但是它不会直接返回,我需要单击某个地方,然后将其注册到文本框。当我选中复选框时,我需要的是直接输入文本框的值。该表代码来自php,因此class + number将会更改,并且无法修复。

下面是代码段。

function doSomethingElse(row) {
  //select all checkboxes with name userid that are checked
  var checkboxes =
    document.querySelectorAll("input[name='student_name[]']:checked")

  var values = "";

  //append values of each checkbox into a variable (seperated by commas)
  for (var i = 0; i < checkboxes.length; i++) {
    values += checkboxes[i]
      .value + ","
  }

  //remove last comma
  values = values.slice(0, values.length - 1)

  //set the value of input box
  document.getElementById("stud_name").value = values;

}


$("input:checkbox").change(function() {
  //alert('Ok!');
  var value = $(this).attr("class");
  $(":checkbox[class='" + value + "']").prop("checked", this.checked);
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<table>
  <tr onclick="doSomethingElse(this);">
    <td><input type="checkbox" class="something1" name="user_id[]" value='' /></td>
    <td><input type="checkbox" class="something1" name="student_name[]" value='1' /></td>
    <td><input type="checkbox" class="something2" name="student_name[]" value='' /></td>
    <td><input type="checkbox" class="something2" name="user_id[]" value='2' /></td>
  </tr>
</table>

<input class="form-control" name="stud_name" id="stud_name" type="text" maxlength="255" />

3 个答案:

答案 0 :(得分:2)

尝试使用$("input:checkbox").click(function () {代替change

function doSomethingElse(row){

  //select all checkboxes with name userid that are checked
  var checkboxes = document.querySelectorAll("input[name='student_name[]']:checked")

  var values = "";

  //append values of each checkbox into a variable (seperated by commas)
  for(var i=0;i<checkboxes.length;i++){
    values += checkboxes[i].value + ","
  }

  //remove last comma
  values = values.slice(0,values.length-1);

  //set the value of input box
  document.getElementById("stud_name").value = values;

}

$("input:checkbox").click(function () {
  //alert('Ok!');
  var value = $(this).attr("class");
  $(":checkbox[class='" + value + "']").prop("checked", this.checked);
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<table>
 <tr onclick="doSomethingElse(this);">

    <td><input type="checkbox" class ="something1"name="user_id[]" value='ID1' /></td>
    <td><input type="checkbox" class ="something1"name="student_name[]" value='NAME1' /></td>
    <td><input type="checkbox" class ="something2"name="student_name[]" value='NAME2' /></td>
    <td><input type="checkbox" class ="something2"name="user_id[]" value='ID2' /></td>
  </tr>
</table>

<input class="form-control" name="stud_name" id="stud_name" type="text" maxlength="255" />

答案 1 :(得分:1)

很难从问题中确切地找到您想要的东西,但是我已经尝试了。

首先,您的HTML是否存在错误?应该在下面:

    <td><input type="checkbox" class="something2" name="student_name[]" value='' /></td>
    <td><input type="checkbox" class="something2" name="user_id[]" value='2' /></td>

实际上是:

    <td><input type="checkbox" class="something2" name="student_name[]" value='2' /></td>
    <td><input type="checkbox" class="something2" name="user_id[]" value='' /></td>

请注意这些值会交换。

我认为要解决您的问题,您可以像下面这样在onchange中完成所有工作:

$("input:checkbox").change(function () {
  //alert('Ok!');
  var value = $(this).attr("class");
  $(":checkbox[class='" + value + "']").prop("checked", this.checked);
  
  var checkboxes = $("input[name='student_name[]']:checked");
  var values = "";

  //append values of each checkbox into a variable (seperated by commas)
  for(var i=0;i<checkboxes.length;i++) {
    values += checkboxes[i].value + ","
  }

  //remove last comma
  values = values.slice(0,values.length-1)

  //set the value of input box
  $("#stud_name").val(values);
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
   <tr>

      <td><input type="checkbox" class ="something1"name="user_id[]" value='' /></td>
      <td><input type="checkbox" class ="something1"name="student_name[]" value='1' /></td>
      <td><input type="checkbox" class ="something2"name="student_name[]" value='2' /></td>
      <td><input type="checkbox" class ="something2"name="user_id[]" value='' /></td>
    </tr>
 </table>

 <input class="form-control" name="stud_name" id="stud_name" type="text" maxlength="255" />

我也尝试过改善您的格式设置,并坚持只使用jquery选择器

答案 2 :(得分:1)

我为你招来了她的工作。 https://jsfiddle.net/nd01p86t/15/

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<table>
  <tr>
    <td><input type="checkbox" class="something1" name="user_id[]" value='' /></td>
    <td><input type="checkbox" class="something1" name="student_name[]" value='1' /> </td>
    <td><input type="checkbox" class="something2" name="student_name[]" value='' /> </td>
    <td><input type="checkbox" class="something2" name="user_id[]" value='2' /></td>
  </tr>
</table>

<input class="form-control" name="stud_name" id="stud_name" type="text" maxlength="255" />

功能...

function doSomethingElse(row) {
  //select all checkboxes with name userid that are checked
  var checkboxes = document.querySelectorAll("input[name$='[]']:checked")
  // OR...
  //var checkboxes = document.querySelectorAll("input[type='checkbox']:checked")

  //append values of each checkbox into a variable (seperated by commas)

  var values = Array.from(checkboxes).filter( checkbox => checkbox.value ).map( checkbox => checkbox.value ).join(',');

  //set the value of input box
  document.getElementById("stud_name").value = values;
}

//  Attach to the table and delegate 'click' per row
$("table").delegate("tr", "click", doSomethingElse);


$("input:checkbox").click(function() {
  //alert('Ok!');
  var value = $(this).attr("class");
  $(":checkbox[class='" + value + "']").prop("checked", this.checked);
})
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