ASP.NET Cannot get FULL list of ALL countries in the world - asp.net

Question

There are 196 countries in the world.
I'm trying to show a dropdown list that show all of them.
I see many developer suggest using CultureInfo of ASP.NET but it's missing some countries because Culture & Country are different things.
So how can I get a list of all countries for my purpose please ?. I really appreciate your help.

Answer 1

In ASP.NET a DropDown
<asp:DropDownList ID="selCountries" runat="server"></asp:DropDownList>
is equivalent to
<select id="selCountries"></select>
Alternatively, you could use a Web service to fill a select tag with countries through JavaScript XMLHttpRequest object.
Example: https://restcountries.eu/
Something like this:
(function() {
var newXHR;
function sendXHR(options) { // Helper function.
newXHR = new XMLHttpRequest() || new ActiveXObject("Microsoft.XMLHTTP");
if (options.sendJSON === true) {
options.contentType = "application/json; charset=utf-8";
options.data = JSON.stringify(options.data);
} else {
options.contentType = "application/x-www-form-urlencoded";
}
newXHR.open(options.type, options.url, options.async || true);
newXHR.setRequestHeader("Content-Type", options.contentType);
newXHR.send((options.type == "POST") ? options.data : null);
newXHR.onreadystatechange = options.callback;
return newXHR;
}
sendXHR({
type: "GET",
url: "https://restcountries.eu/rest/v1/all",
callback: function() {
if (newXHR.readyState === 4 && newXHR.status === 200) {
var data = JSON.parse(newXHR.response);
var selCountries = document.getElementById("selCountries"); // Get the select tag.
// You can get the selected country.
selCountries.onchange = function() {
alert(this.value);
};
var option;
for (var i = 0; i < data.length; i++) { // For every country make an option tag.
option = document.createElement("option");
selCountries.options.add(option, 0);
selCountries.options[0].value = data[i].name; // Country name from the index «i» of the data array.
selCountries.options[0].innerText = data[i].name;
selCountries.appendChild(option); // Append the option tag to the select tag.
}
}
}
});
})();
<select id="selCountries"></select>
In ASP.NET MVC5 NET 4.5, you can bind an object to #Html.DropDownList by using ViewBag.
You need to create a model according to https://restcountries.eu/rest/v1/all json response.
Model: CountryModel.cs
using System.Collections.Generic;
namespace RestCountries.Models
{
public class Translations
{
public string de { get; set; }
public string es { get; set; }
public string fr { get; set; }
public string ja { get; set; }
public string it { get; set; }
}
public class CountryModel
{
public string name { get; set; }
public string capital { get; set; }
public List<string> altSpellings { get; set; }
public string relevance { get; set; }
public string region { get; set; }
public string subregion { get; set; }
public Translations translations { get; set; }
public int population { get; set; }
public List<object> latlng { get; set; }
public string demonym { get; set; }
public double? area { get; set; }
public double? gini { get; set; }
public List<string> timezones { get; set; }
public List<object> borders { get; set; }
public string nativeName { get; set; }
public List<string> callingCodes { get; set; }
public List<string> topLevelDomain { get; set; }
public string alpha2Code { get; set; }
public string alpha3Code { get; set; }
public List<string> currencies { get; set; }
public List<object> languages { get; set; }
}
}
Controller: DefaultController.cs
using RestCountries.Models;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Web.Mvc;
namespace RestCountries.Controllers
{
public class DefaultController : Controller
{
// GET: Default
public ActionResult Index()
{
string url = "https://restcountries.eu/rest/v1/all";
// Web Request with the given url.
WebRequest request = WebRequest.Create(url);
request.Credentials = CredentialCache.DefaultCredentials;
WebResponse response = request.GetResponse();
Stream dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string jsonResponse = null;
// Store the json response into jsonResponse variable.
jsonResponse = reader.ReadLine();
if (jsonResponse != null)
{
// Deserialize the jsonRespose object to the CountryModel. You're getting a JSON array [].
List<CountryModel> countryModel = Newtonsoft.Json.JsonConvert.DeserializeObject<List<CountryModel>>(jsonResponse);
// Set the List Item with the countries.
IEnumerable<SelectListItem> countries = countryModel.Select(x => new SelectListItem() { Value = x.name, Text = x.name });
// Create a ViewBag property with the final content.
ViewBag.Countries = countries;
}
return View();
}
}
}
View: Index.cshtml
#{
ViewBag.Title = "Index";
}
<h2>Index</h2>
#Html.DropDownList("Countries")
Result: