尝试使用下拉列表的ID选择在下拉列表中选择的值

Question

enter image description here I am trying to retrieve the value that was selected by the end user in a drop down list. The variable country is always null, I am using the id of the drop down list to retrieve the value that was selected by the user.

Here is the code in my view:

    <script>
        var country = document.getElementById("Countries");
        var value = country.options[country.selectedIndex].value;
        var text = country.options[country.selectedIndex].text;
  </script>

@Html.Label("Country", "Country")
<select name="Countries" id="Countries">
    @foreach (var country in ViewBag.countries)
    {
        <option value="@(country.country)">@(country.country)</option>
    }
</select>

}

Answer 1

Try like this,

 <label for="Country">Country</label> <select name="Countries" id="Countries"> <option value="Iceland">Iceland</option> <option value="Kosovo">Kosovo</option> <option value="Belgium">Belgium</option> </select> 

var element = document.getElementById("Countries"); 
var selected_country_value = element.options[element.selectedIndex].value;    
alert(selected_country_value);

Demo: https://jsbin.com/poxijiluci/edit?html,js,output