实现多语言切换

Atomx.Admin/Atomx.Admin.Client/Components/LangSelector.razor

@@ -0,0 +1,82 @@
+@inject ILocalizationProvider LocalizationProvider
+@inject NavigationManager Navigation
+@inject IJSRuntime JS
+
+<select @onchange="OnChange" value="@selected">
+    @foreach (var item in options)
+    {
+        <option value="@item.Key">@item.Value</option>
+    }
+</select>
+
+@code {
+    private string selected = "zh";
+
+    private readonly Dictionary<string, string> options = new(StringComparer.OrdinalIgnoreCase)
+    {
+        { "zh", "<22><><EFBFBD><EFBFBD>" },
+        { "en", "English" }
+    };
+
+    protected override async Task OnInitializedAsync()
+    {
+        var current = LocalizationProvider.CurrentCulture;
+        var mapping = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        {
+            { "zh", "zh-Hans" },
+            { "en", "en-US" }
+        };
+        var found = mapping.FirstOrDefault(kv => string.Equals(kv.Value, current, StringComparison.OrdinalIgnoreCase)).Key;
+        if (!string.IsNullOrEmpty(found)) selected = found;
+
+        LocalizationProvider.LanguageChanged += (s, c) =>
+        {
+            var found2 = mapping.FirstOrDefault(kv => string.Equals(kv.Value, c, StringComparison.OrdinalIgnoreCase)).Key;
+            if (!string.IsNullOrEmpty(found2)) selected = found2;
+            StateHasChanged();
+        };
+    }
+
+    private async Task OnChange(ChangeEventArgs e)
+    {
+        if (e?.Value is string val)
+        {
+            selected = val;
+            await LocalizationProvider.SetCultureAsync(selected);
+
+            try
+            {
+                // Use NavigationManager to inspect and modify the current client-side path
+                var relative = Navigation.ToBaseRelativePath(Navigation.Uri).Trim('/');
+                var segments = string.IsNullOrEmpty(relative) ? Array.Empty<string>() : relative.Split('/', StringSplitOptions.RemoveEmptyEntries);
+                var mapping = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+                {
+                    { "zh", "zh-Hans" },
+                    { "en", "en-US" }
+                };
+
+                string newUrl;
+                if (segments.Length > 0 && mapping.ContainsKey(segments[0]))
+                {
+                    // replace existing locale prefix
+                    var remaining = segments.Length > 1 ? "/" + string.Join('/', segments.Skip(1)) : "/";
+                    newUrl = "/" + selected + remaining;
+                }
+                else
+                {
+                    // keep current path, but trigger remount by navigating to same URI
+                    newUrl = Navigation.Uri;
+                }
+
+                // trigger client-side navigation (no hard reload) so components remount and re-evaluate localizer
+                Navigation.NavigateTo(newUrl, forceLoad: false);
+                return;
+            }
+            catch
+            {
+                // fallback: just request UI refresh
+                StateHasChanged();
+            }
+        }
+    }
+}