Hi everyone.

I need some help here.

using umbraco 7.6.3

Explanation: When i use async actions like Ajax.BeginForm, the threads cultureinfo is not set and therefor the library.dictionaryItem returns empty (i think).. First time the page load, the translation is there, but when i submit the form. then it returns with brackets [Username] and [Password] ("as it should if the returned DictionaryItem is Null or empty")

Question: Is there a simple way to set the cultureinfo on async calls? Or is there a workaround? or do i just have to set the cultureinfo on all my models?

My Model, with my custom DisplayNameAttribute, that uses a library.DictionaryItem.

public class LoginModel
{
    [Display("Username")] // Custom DisplayNameAttribute
    public string Username { get; set; }

    [Display("Password")] // Custom DisplayNameAttribute
    public string Password { get; set; }
}

Custom DisplayNameAttribute

public class Display : DisplayNameAttribute
{
    private string DictionaryItemKey { get; set; }

    public Display(string dictionaryItemKey) : base()
    {
        DictionaryItemKey = dictionaryItemKey;
    }

    public override string DisplayName
    {
        get
        {
            // Custom service wish return library.GetDictionaryItem(key)
            return TranslationService.GetDictionaryItem(DictionaryItemKey);
        }
    }
}

Custom service

public static class TranslationService
{
    public static string GetDictionaryItem(string key)
    {
        var dictionaryItem = umbraco.library.GetDictionaryItem(key);
        if (!string.IsNullOrWhiteSpace(dictionaryItem))
        {
            return dictionaryItem;
        }
        else
        {
            return string.Format("[{0}]", key);
        }
    }
}

SurfaceController

public class LoginSurfaceController : Umbraco.Web.Mvc.SurfaceController
{
    [ChildActionOnly]
    [AllowAnonymous]
    public ActionResult GetLogin()
    {
        return PartialView("~/Views/Partials/Models/login.cshtml", ModelHelper.NewLoginModel);
    }

    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    // Could also be public async Task<ActionResult> PostLogin(LoginModel model) with an await method.
    public ActionResult PostLogin(LoginModel model)
    {
        ModelState.AddModelError("", "Just to return an error");
        return PartialView("~/Views/Partials/Models/login.cshtml", model);
    }
}

home.cshtml

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage
@{
    Layout = "layout.cshtml";

}
<div id="parentDiv">
    @{ Html.RenderAction("GetLogin", "LoginSurface"); }
</div>

PartialView login.cshtml

@model ServiceApplication.Models.LoginModel

@using (Ajax.BeginForm("PostLogin", "LoginSurface", new AjaxOptions
{
    InsertionMode = InsertionMode.Replace,
    UpdateTargetId = "parentDiv",
    AllowCache = true,
}))
{
    @Html.AntiForgeryToken();
    @Html.ValidationSummary(true)
    <div>
        @Html.LabelFor(m => m.Username)
        @Html.TextBoxFor(m => m.Username)
        @Html.ValidationMessageFor(m => m.Username)
    </div>
    <div>
        @Html.LabelFor(m => m.Password)
        @Html.PasswordFor(m => m.Password)
        @Html.ValidationMessageFor(m => m.Password)
    </div>
    <div>
        <button type="submit" class="btn">Login</button>
    </div>
}