ASP.NET Core 5 MVC 从视图中渲染字符串

Question

I try to display a string from Action in a View. This sounds like a very simple and easy task, but I don't get it how to do this.

My async Action returns Content Result:

public async Task<IActionResult> DisplayName(string key)
{
    // Retrieves the requested culture
    var rqf = Request.HttpContext.Features.Get<IRequestCultureFeature>();
    // Culture contains the information of the requested culture
    var culture = rqf.RequestCulture.Culture;

    return Content(await Task.FromResult(_displayProvider.GetDisplayName(key, culture.Name)));
}

My View is very simple html:

@model List<MyModel>

<table class="table table-bordered table-striped datatable">
    <thead class="table-head-dark">
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.First().Id)
            </th>
            <th>
                Actions
            </th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Id)
                </td>
                <td>
                    <partial name="_EditDetailButton" model="@item.Id" />
                    <partial name="_DeleteButton" model="@item" />
                </td>
            </tr>
        }
    </tbody>
</table>

Instead of @Html.DisplayNameFor(model => model.First().Id) I want to Display a user-defined value. The user-defined value is returned from the Action.

I tried @Url.Action("DisplayName", "DisplayName", new { key = "MyModel.Id" }) but this is rendering an Url.

I tried Html.RenderAction("DisplayName", "DisplayName", new { key = "LastName" }) but RenderAction does not exist in ASP.NET Core 5.

I could call a static Class eg DisplayNameProvider.GetDisplayName("MyModel.Id", ???) but i dont know how to get the choosen culture to pass it to the method.

How do I get this working? I am also not familiar with components in ASP.NET Core.

Or is there a completely different solution for displaying strings, which the user has defined and save to the database? The DisplayNameProvider is retrieving the strings from database and handles caching.

UPDATE: The Goal is to store and change displaynames for properties in the database. The user can change the displaynames. In my example the user wants a different displayname for the column header. I cannot use resource files as these are static and cannot be changed during runtime.

This is my DisplayNameProvider.GetDisplayName Method:

public string GetDisplayName(string ressourceKey, string language)
{
    var ressources = GetCached(language);

    var item = ressources.FirstOrDefault(r => r.ResourceKey == ressourceKey);
    
    return item.Text;
}

Thanks in advance

Answer 1

I ended up using a string localizer, which returns the desired value for my properties.

Now i can use displaynamefor and it shows the value of the language. Eg:

@Html.DisplayNameFor(model => model.MyProperty)