javascript - 序列化选择

Question

我的表格(大约)

<form name="ShoppingCart" method="post">
  <select name="city">
    <option value="db5c88c4-391c-11dd-90d9-001a92567626">City1</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567636">City2</option>
    ...
    <option value="db5c88c4-391c-11dd-90d9-001a92567689">CityN</option>
  </select>
  <select name="warehouses">
    <option value="db5c88c4-391c-11dd-90d9-001a92567329">Warehouses1</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567452">Warehouses2</option>
    ...
    <option value="db5c88c4-391c-11dd-90d9-001a92567352">WarehousesN</option>
  </select>
  <div>
      <input class="submit_form" type="submit" name="Submit" value="Submit" />
  </div>
</form>

根据第一个选择的选择动态创建选择仓库。我需要 serialize() 形式，以便它是序列化中的当前值和文本。

cityName=City1&cityValue=db5c88c4-391c-11dd-90d9-001a92567352&warehousesName=Warehouses1&warehousesValue=db5c88c4-391c-11dd-90d9-001a92567352

我怎样才能做到这一点？

Answer 1

如果您要发布数据，则可以使用对象或可以使用 FormData。无论哪种方式，您都需要构建新的结构，因为您的表单不包含这些项目。大多数人会使用该值在所需数据服务器端查找数据，而不是将其发送到服务器。根据需要向服务器传递最少量的数据。

$(function() {
  $("form").submit(function(e) {
    e.preventDefault();
    var fData = {};
    // Alternate:
    var formD = new FormData();

    $("select", this).each(function(i, el) {
      fData[$(el).attr("name") + "Name"] = $("option:selected", el).text().trim();
      fData[$(el).attr("name") + "Value"] = $(el).val();
      // Alternate:
      formD.append($(el).attr("name") + "Name", $("option:selected", el).text().trim());
      formD.append($(el).attr("name") + "Value", $(el).val());
    });
    console.log($.param(fData));
    // FormData does not have a Serialize or Stringify method
    for (var pair of formD.entries()) {
      console.log(pair[0] + ': ' + pair[1]);
    }
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form name="ShoppingCart" method="post">
  <select name="city">
    <option value="db5c88c4-391c-11dd-90d9-001a92567626">City1</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567636">City2</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567689">CityN</option>
  </select>
  <select name="warehouses">
    <option value="db5c88c4-391c-11dd-90d9-001a92567329">Warehouses1</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567452">Warehouses2</option>
    <option value="db5c88c4-391c-11dd-90d9-001a92567352">WarehousesN</option>
  </select>
  <div>
    <input class="submit_form" type="submit" name="Submit" value="Submit" />
  </div>
</form>

如您所见，这会迭代 select 元素并根据您的需要收集数据。然后您需要将其发布到您的脚本中。