自定义选择列表的剔除绑定默认值

Question

I've been working with knockout bindings for a couple of days and I've defined a select as below:

<select data-bind="options: availableLanguages, value: selectedLanguage, optionsText: 'Name', optionsValue: 'Id'"></select>

I receive the language list ( availableLanguages ) and the default language ( selectedLanguage ) from:

internal class AvailableLanguages
    {
        public string Name { get; set; }
        public string Id { get; set; }
    }


AvailableLanguages userLanguage = new AvailableLanguages();
List<AvailableLanguages> languagesList = new List<AvailableLanguages>();

languagesList.Add(new AvailableLanguages()
                            {
                                Name = "English",
                                Id = "en"
                            });
languagesList.Add(new AvailableLanguages()
                            {
                                Name = "Francais",
                                Id = "fr"
                            });
languagesList.Add(new AvailableLanguages()
                            {
                                Name = "Espanol",
                                Id = "es"
                            });
languagesList.Add(new AvailableLanguages()
                            {
                                Name = "Italian",
                                Id = "it"
                            });

languagesList.Add(new AvailableLanguages()
                            {
                                Name = "Espanol",
                                Id = "es"
                            });

userLanguage.Id = "en";
userLanguage.Name = "English";

and I fill the knockout observable:

_mVM.availableLanguages = ko.observableArray();
_mVM.selectedLanguage = ko.observable();

_mVM.availableLanguages(languagesList);
_mVM.selectedUnit(userLanguage);

I managed to display only the Names from availableLanguages but I need the default language to be Espanol but is always the first language from the list, in my case English.

It is possible to change the default language to Espanol?

Answer 1

只需在_mVM.availableLanguages(languagesList);之后设置selectedLanguage的值_mVM.availableLanguages(languagesList);

selectedLanguage("es");