问如何用javascript计算金额？
EN

Stack Overflow用户

提问于 2016-10-26 21:21:50

回答 2查看 158关注 0票数 1

如你所见，我有这样一个表单，它通过测试计算员工的数量，然后由用户选择。员工数量将由用户输入，测试将从数据库中获取。每个测试在数据库中都有各自的价格设置。我用脚本写下拉列表。

如果用户在no.of员工中有任何价值，并检查任何一个测试，那么在总金额上应该计算点击购买测试吗？

<form action="add_corporate_test.php" method="POST">
    <script type="text/javascript">
        $(document).ready(function () {
            $('#example-onDeselectAll').multiselect({
                includeSelectAllOption: true,
                onDeselectAll: function () {
                    alert('please select any test!');
                }
            });
        });
    </script>
    <div class="row">
        <h5 class="cor_label">No. of Emp/Students:</h5>
        <input
            type="text" id="no_emp"
            placeholder="No. of Employees/Students"
            class="normal" required
        >
        <h5 class="cor_label">Email Address:</h5>
        <input
            type="text"
            id="no_emp2"
            placeholder="Email Address"
            class="normal" value="<?php echo $_SESSION[email]; ?>"
            required
            disabled
        >
        <h5 class="cor_label">Select Test:</h5>
        <select id="example-onDeselectAll" multiple="multiple">
            <?php
            $sql = mysql_query("select * from `test` ");
            while ($data = mysql_fetch_assoc($sql)) {
                $sum = 0;
                ?>
                <option value="<?php echo $data['test_name']; ?>">
                    <?php echo $data['test_name']; ?>
                </option>
            <?php } ?>
        </select>
        <h5 class="cor_label">Total Amount:</h5>
        <input
            type="text"
            id="no_emp3"
            class="normal"
            name="total_amount"
            placeholder="total amount"
            value="<?php echo $sum; ?>"
            disabled
        >
        <button class="btn btn-primary" type="submit" name="corporate_buy">
            Buy Test
        </button>
    </div>
</form>

javascript

php

回答 2

Stack Overflow用户

回答已采纳

发布于 2016-10-26 23:04:07

嗨，兄弟，脚本b‘Hi有多个选择选项

<script>
$('#example-onDeselectAll').change(function() {
var value = $(this).val();
var i=0; 
var len = value.length;
var no_emp = $("#no_emp").val();
  for(i; i < len; i++){
var res = value[i] .split("_");
var tot_amount += res[1]*no_emp;
}
$("#no_emp3").val(tot_amount);
});
</scrit>

票数 1

Stack Overflow用户

发布于 2016-10-26 21:42:02

获取select选项的测试和值。在选择拆分值时使用javascript。然后把金额和no.of.employee相加

<select id="example-onDeselectAll" multiple="multiple" >
            <?php   
                    $sql=mysql_query("select * from `test` ");
                while($data=mysql_fetch_assoc($sql))
                {
                    $sum=0; 
                ?>                                  
               <option  value="<?php echo $data['test_name'];?>_<?php echo $data['price'];?>"><?php echo $data['test_name'];?></option>                             
            <?php }?>                     
            </select>  

<script>
$('#example-onDeselectAll').change(function() {
var value = $(this).val();
var no_emp = $("#no_emp").val();
var res = value .split("_");
var tot_amount = res[1]*no_emp;
$("#no_emp3").val(tot_amount);
});
</scrit>