选择2下拉菜单，不提供所选项目的ID，我如何访问控制器绑定

由于某些原因，我选择无法访问id值，因此我已经设置了几个县，例如，我正在使用https://select2.org/下拉菜单来显示国家/地区的图像

<script>
 $(function () {
    //Initialize Select2 Elements
    $('.select2').select2()
    var isoCountries = [
        { id: 1, flag: 'af', text: 'Afghanistan' },
        { id: 2, flag: 'ax', text: 'Aland Islands' },
        { id: 3, flag: 'al', text: 'Albania' },
        { id: 4, flag: 'dz', text: 'Algeria' },
        { id: 5, flag: 'as', text: 'American Samoa' },
        { id: 6, flag: 'ad', text: 'Andorra' },
        { id: 7, flag: 'ao', text: 'Angola' },      
   ]; 

function formatCountry(country) {
    if (!country.id) { return country.text; }
    var $country = $(
        '<span class="flag-icon flag-icon-' + country.id.toLowerCase() + ' flag-icon-squared"></span>' +
        '<span class="flag-text">' + country.text + "</span>"
    );
    return $country;
};

//Assuming you have a select element with name country
// e.g. <select name="name"></select>

$("[name='Flag']").select2({
    placeholder: "Please Select a country",
    templateResult: formatCountry,
    data: isoCountries
});
<script>

当我查看下拉菜单的生成内容时，选择要为其生成的内容。

<div class="form-group">
    @Html.LabelFor(m => m.CountryOfBirth)
    <span asp-validation-for="CountryOfBirth" class="text-danger"></span>
    <select asp-for="CountryOfBirth" name="CountryOfBirth" id="CountryOfBirth" class="form-control select2" style="height:35px" name="Flag">
        <option>Please select Country Of Birth</option>
    </select>
    <span asp-validation-for="CountryOfBirth" class="text-danger"></span>
</div>

并生成为这样，没有在html中的位置是所选项目的ID，因此控制器将如何绑定它

<span class="selection"><span class="select2-selection select2-selection--single" role="combobox" aria-haspopup="true" aria-expanded="false" tabindex="0" aria-disabled="false" aria-labelledby="select2-CountryOfBirth-container">

<span class="select2-selection__rendered" id="select2-CountryOfBirth-container" role="textbox" aria-readonly="true" title="United Kingdom">United Kingdom</span>

<span class="select2-selection__arrow" role="presentation"><b role="presentation"></b></span></span>