Browser Culture, Session Culture and Runtime Language Switching

Localization in Wisej.NETModule 4The lesson guide, the walkthrough video, the knowledge check and the hands-on lab this sample was built from are on learnwisej.com — free, with an AI tutor in every lesson.

Open the course

The GlobalDesk dashboard exactly as the walkthrough shows it: the blue application bar, the Welcome to GlobalDesk heading, the Customers button, the Language picker on the right, the Culture preview panel with Date / Quantity / Amount, the designer-localized Customer editor panel beside it, and the status strip reporting the session culture.

One selection repaints three things, in one handler: the resource-backed captions, the formatted values, and the designer-localized editor — which is rebuilt, because that is the only way a control that read its resources at construction changes language.

The source of this sample

iceteagroup/LearnWisej-SamplesLocalization in Wisej.NET Course/Module 4

Browse this folder on GitHub

Or clone it: git clone https://github.com/iceteagroup/LearnWisej-Samples.git — then open GlobalDesk.slnx in Visual Studio and press F5.

Run it

cd "Localization in Wisej.NET Course/Module 4/GlobalDesk"
dotnet run -f net10.0 --urls http://localhost:6104

Open http://localhost:6104. culture is auto in Default.json, so the session starts from the browser's Accept-Language; http://localhost:6104/?lang=de-DE in a new tab starts a second session in German while the first stays where it is.

What to try

Action	Expected result
Pick Deutsch (Deutschland)	Bar, heading, button, picker caption, preview captions and all three values change together; the editor panel is rebuilt in German and shows a green neu erstellt badge; the strip reads Sitzungskultur: de-DE.
Watch the editor's buttons	Speichern and Abbrechen are wider than Save and Cancel. The widths came from CustomerEditor.de.resx with the new instance.
Pick Français (Canada)	English text — there is no French resource file — with Canadian French formatting: mercredi 23 septembre 2026, 1 234 567,89, 1 850,75 $. Fallback is per key, and formatting does not come from a resource at all.
Open ?lang=de-DE in a second tab	Two sessions, two cultures, one server process, both open at once.
Search for a static culture field	There isn't one. The session already stores it.

Notes

• The combo handler assigns the culture and stops. Everything else hangs off Application.CultureChanged, so the ?lang= parameter, a saved preference and a support tool all get the same refresh for free.
• The subscription is removed in Dispose. Application.CultureChanged outlives the page.
• The language list shows each language in its own language. A German speaker looking for German finds Deutsch, not German, so those three values are marked invariant.
• The badge on the editor panel states a comparison the page can actually make: editor.BuiltForCulture against Application.CurrentCulture.Name. It never says recreated unless a rebuild happened.
• The picker lives in its own right-docked column rather than on an anchor. An anchor measures its margin from the design-time size, and the browser is never that size.