ASP.NET MVC generate url with different culture parameter by ActionLink

Question

I have several url patterns as follows in the Route:

{lang}/package/{packageID}
{lang}/package/{packageID}/Edit/{partNumber}
...

There's a footer in layout.cshtml, the footer provides different culture links for users to change the language of the website. When the user click the link, I hope it can change the language and stay in the current page, so I render the link by Razor like this:

@Html.ActionLink("English", ViewContext.RouteData.Values["Action"], ViewContext.RouteData.Values["Controller"], new { lang = "en-us"}, null)
@Html.ActionLink("Traditional Chinese", ViewContext.RouteData.Values["Action"], ViewContext.RouteData.Values["Controller"], new { lang = "zh-tw"}, null)
@Html.ActionLink("Japanese", ViewContext.RouteData.Values["Action"], ViewContext.RouteData.Values["Controller"], new { lang = "ja-jp"}, null)
...

But there is a problem is that I need to pass other parameters which I mentioned above to the page accordingly to keep users staying in the current page.

How could I achieve in this scenario?

Thanks!

ASP.NET MVC will automatically reuse route segments from the current request if they occur earlier than the segment for which you are explicitly providing a value. If you could make your {lang} segment the last in the route, what you want would happen automatically. — GSerg
– GSerg, Commented Nov 5, 2018 at 15:08
@GSerg Thnaks for your comment, but it doesn't seem like a good way to do this, It will actually work in this scenario. However it would be a constraint on the url pattern, every pattern needs to put the {lang} at the end, and also make assumptions about the order in which users make requests. But this is a hint, if I still cannot find other solutions, I'll try it. Thank you! — Allen Chen
– Allen Chen, Commented Nov 5, 2018 at 16:12

Federico Dipuma · Accepted Answer · 2018-11-05 16:39:33Z

2

You may create an extension method as an helper for the creation of language-dependent links:

public static class LanguageExtensions
{
    public static RouteValueDictionary ForLang(this RouteValueDictionary dict, string lang)
    {
        var cloned = new RouteValueDictionary(dict);
        cloned["lang"] = lang;
        return cloned;
    }
}

Now you may use it in this way:

@Html.ActionLink("English", ViewContext.RouteData.Values["Action"], ViewContext.RouteData.Values["Controller"], ViewContext.RouteData.ForLang("en-us"), null)

answered Nov 5, 2018 at 16:39

Federico Dipuma

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1 Comment

Allen Chen Over a year ago

Thanks, this way is simple and clear, it's close to my needs.

Bruno · Accepted Answer · 2018-11-05 16:07:09Z

0

You could use return Redirect(HttpContext.Request.UrlReferrer.ToString()); to return to take users back to the page they were at and not have to worry about passing the parameters again.

The flow would be:

User clicks on a link like @Html.ActionLink("English", ViewContext.RouteData.Values["Action"], ViewContext.RouteData.Values["Controller"], new { lang = "en-us"}, null)
You change the language in the controller's action method
Take user back to the page they were on by calling return Redirect(HttpContext.Request.UrlReferrer.ToString()); from the same action method

answered Nov 5, 2018 at 16:07

Bruno

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1 Comment

Allen Chen Over a year ago

Hi Bruno, thank you for your answer, I've tried this way before posting this question, it works. But I wonder if there's a way better than redirect, because it needs to take more time to do another navigation.

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