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    • Avalanche.Accessor
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      • Introduction
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      • FallbackCultureProvider
      • ResourceManager
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      • Microsoft.Extensions
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      • Asp.Net
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      • Introduction
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      • Introduction
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      • Introduction
      • HResult
        • Introduction
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    • Avalanche.Template
      • Introduction
      • TemplateFormats
      • ITemplatePrintable
      • ITemplateFormatPrintable
      • ITemplateText
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      • ITemplateFormats
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      • Emplacement
    • Avalanche.Tokenizer
      • Introduction
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    • Avalanche.Utilities
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        • Introduction
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    • Avalanche.Writer
      • Introduction
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    Culture Assigner

    This section describes how to add a culture assigner selection dropdown.

    Culture assigner

    Add IOptions<RequestLozalizationOptions> service.

    services.Configure<RequestLocalizationOptions>(options =>
        {
            options.AddSupportedCultures("en", "fi", "sv");
            options.AddSupportedUICultures("en", "fi", "sv");
            options.SetDefaultCulture("en");
            options.FallBackToParentCultures = true;
            options.FallBackToParentUICultures = true;
        });
    

    Add .UseRequestLocalization to 'app'.

    RequestLocalizationOptions localizationOptions = app.Services.GetRequiredService<IOptions<RequestLocalizationOptions>>().Value;
    app.UseRequestLocalization(localizationOptions);
    

    Add Models/CultureAssignmentModel.cs

    namespace samples.asp.Models;
    using System.Globalization;
    
    /// <summary>Culture assignment model</summary>
    public record CultureAssignmentModel(CultureInfo CurrentUICulture, IList<CultureInfo> SupportedCultures);
    

    Add Pages/Components/CultureAssignment/default.cshtml.

    @using System.Globalization
    @model samples.asp.Models.CultureAssignmentModel
    
    <form id="culture-assignment">
        <select name="culture" onchange="this.parentElement.submit();">
            @foreach (CultureInfo culture in Model.SupportedCultures)
            {
                <option value="@culture.Name" selected="@(Model!.CurrentUICulture.Name == culture.Name)">@culture.DisplayName</option>
            }
        </select>
    </form>
    

    Add Pages/ViewComponents/CultureAssignmentViewComponent.cs.

    namespace samples.asp.ViewComponents;
    using System.Globalization;
    using Microsoft.AspNetCore.Localization;
    using Microsoft.AspNetCore.Mvc;
    using Microsoft.Extensions.Options;
    using samples.asp.Models;
    
    /// <summary></summary>
    public class CultureAssignmentViewComponent : ViewComponent
    {
        /// <summary>Options</summary>
        IOptions<RequestLocalizationOptions> localizationOptions;
    
        /// <summary>Create component</summary>
        public CultureAssignmentViewComponent(IOptions<RequestLocalizationOptions> localizationOptions)
        {
            // Assert not null
            ArgumentNullException.ThrowIfNull(localizationOptions);
    
            this.localizationOptions = localizationOptions;
        }
    
        /// <summary>Assign culture</summary>
        public IViewComponentResult Invoke()
        {
            // Get culture feature with assigned culture
            IRequestCultureFeature cultureFeature = HttpContext.Features.Get<IRequestCultureFeature>()!;
            // Create model with culture assignment record
            CultureAssignmentModel model = new CultureAssignmentModel(
                CurrentUICulture: cultureFeature.RequestCulture.UICulture,
                SupportedCultures: localizationOptions.Value.SupportedUICultures?.ToArray() ?? Array.Empty<CultureInfo>()
            );
            // Return partial view
            return View(model);
        }
    }
    

    Add @addTagHelper *, samples.asp to Pages/_ViewImports.cshtml.

    @using samples.asp
    @using samples.asp.Models
    @namespace samples.asp.Pages
    @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
    @addTagHelper *, samples.asp
    

    Add <vc:culture-assignment/> to Pages/Shared/_Layout.cshtml.

    <div class="container">
        <a class="navbar-brand" asp-area="" asp-page="/Index">samples.asp</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
            aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
            <ul class="navbar-nav flex-grow-1">
                <li class="nav-item">
                    <a class="nav-link text-dark" asp-area="" asp-page="/Index">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
                </li>
            </ul>
        </div>
        <vc:culture-assignment/>
    </div>
    
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