隨着咱們的應用程序愈來愈受歡迎,咱們的下一步將要開發多語言功能。方便愈來愈多的國家使用咱們中國的應用程序,
基於 WPF 本地化,咱們不少時候使用的是系統資源文件,但是動態切換本地化,就比較麻煩了。
有沒有一種方法既能夠適用系統的資源文件,又能方便快捷的切換本地化呢?git
如今咱們將要實現的是基於 DotNetCore 3.0
以上版本 and WPF
桌面應用程序模塊化的多語言功能。
動態切換多語言思路:
github
CurrentCulture
多語言來使用改變的語言文件裏的key。Binding
拼接Path 在輸出。咱們先來看實現結果
c#
來看一下xaml展現
app
經過ComboBox選擇來切換語言
ide
建立一個WPF App(.NET Core)應用程序
模塊化
建立完成後,咱們須要引入業務A模塊及業務B模塊和業務幫助模塊
PS:根據本身的業務須要來完成項目的搭建。本教程徹底適配多語言功能。工具
在各個模塊裏添加Strings
文件夾用來包含 各個國家和地區的語言文件。
post
多語言能夠參考:https://github.com/UnRunDeaD/WPF---Localization/blob/master/ComboListLanguages.txtui
資源文件能夠放在任意模塊內,好比業務模塊A ,主程序,底層業務,控件工具集等this
Strings文件夾能夠任意命名
SR資源文件能夠任意命名
封裝到底層供各個模塊調用
public class TranslationSource : INotifyPropertyChanged { public static TranslationSource Instance { get; } = new TranslationSource(); private readonly Dictionary<string, ResourceManager> resourceManagerDictionary = new Dictionary<string, ResourceManager>(); public string this[string key] { get { Tuple<string, string> tuple = SplitName(key); string translation = null; if (resourceManagerDictionary.ContainsKey(tuple.Item1)) translation = resourceManagerDictionary[tuple.Item1].GetString(tuple.Item2, currentCulture); return translation ?? key; } } private CultureInfo currentCulture = CultureInfo.InstalledUICulture; public CultureInfo CurrentCulture { get { return currentCulture; } set { if (currentCulture != value) { currentCulture = value; // string.Empty/null indicates that all properties have changed PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(string.Empty)); } } } // WPF bindings register PropertyChanged event if the object supports it and update themselves when it is raised public event PropertyChangedEventHandler PropertyChanged; public void AddResourceManager(ResourceManager resourceManager) { if (!resourceManagerDictionary.ContainsKey(resourceManager.BaseName)) { resourceManagerDictionary.Add(resourceManager.BaseName, resourceManager); } } public static Tuple<string, string> SplitName(string local) { int idx = local.ToString().LastIndexOf("."); var tuple = new Tuple<string, string>(local.Substring(0, idx), local.Substring(idx + 1)); return tuple; } } public class Translation : DependencyObject { public static readonly DependencyProperty ResourceManagerProperty = DependencyProperty.RegisterAttached("ResourceManager", typeof(ResourceManager), typeof(Translation)); public static ResourceManager GetResourceManager(DependencyObject dependencyObject) { return (ResourceManager)dependencyObject.GetValue(ResourceManagerProperty); } public static void SetResourceManager(DependencyObject dependencyObject, ResourceManager value) { dependencyObject.SetValue(ResourceManagerProperty, value); } } public class LocExtension : MarkupExtension { public string StringName { get; } public LocExtension(string stringName) { StringName = stringName; } private ResourceManager GetResourceManager(object control) { if (control is DependencyObject dependencyObject) { object localValue = dependencyObject.ReadLocalValue(Translation.ResourceManagerProperty); // does this control have a "Translation.ResourceManager" attached property with a set value? if (localValue != DependencyProperty.UnsetValue) { if (localValue is ResourceManager resourceManager) { TranslationSource.Instance.AddResourceManager(resourceManager); return resourceManager; } } } return null; } public override object ProvideValue(IServiceProvider serviceProvider) { // targetObject is the control that is using the LocExtension object targetObject = (serviceProvider as IProvideValueTarget)?.TargetObject; if (targetObject?.GetType().Name == "SharedDp") // is extension used in a control template? return targetObject; // required for template re-binding string baseName = GetResourceManager(targetObject)?.BaseName ?? string.Empty; if (string.IsNullOrEmpty(baseName)) { // rootObject is the root control of the visual tree (the top parent of targetObject) object rootObject = (serviceProvider as IRootObjectProvider)?.RootObject; baseName = GetResourceManager(rootObject)?.BaseName ?? string.Empty; } if (string.IsNullOrEmpty(baseName)) // template re-binding { if (targetObject is FrameworkElement frameworkElement) { baseName = GetResourceManager(frameworkElement.TemplatedParent)?.BaseName ?? string.Empty; } } Binding binding = new Binding { Mode = BindingMode.OneWay, Path = new PropertyPath($"[{baseName}.{StringName}]"), Source = TranslationSource.Instance, FallbackValue = StringName }; return binding.ProvideValue(serviceProvider); } }
//引用業務模塊 xmlns:ext="clr-namespace:WpfUtil.Extension;assembly=WpfUtil" // 引用剛纔你命名的文件夾名字 xmlns:resx="clr-namespace:ModuleA.Strings" // 每一個模塊經過幫助類,將當前模塊的資源類, // 加載到資源管理集合裏面用於分配每一個鍵值 // 引用剛纔你命名的資源文件名字 -> SR ext:Translation.ResourceManager="{x:Static resx:SR.ResourceManager}"
顯示文字
//讀取資源文件裏的鍵值 <Label Content="{ext:Loc Test}" FontSize="21" />
根據業務的須要,咱們在界面上沒法適用靜態文字顯示的,通常經過後臺代碼來完成,對於 code-behind 的變量使用,一樣能夠應用於資源字典。
好比在業餘模塊代碼段裏的模擬實現
// SR 是當前業務模塊的資源文件類,管理當前模塊的資源字符串。 // 根據不一樣的 `CurrentCulture` 選擇相對應的本地化 Message = string.Format(SR.ResourceManager.GetString("Message",Thread.CurrentThread.CurrentUICulture),System.DateTime.Now);
PS: 歡迎各位大佬慷慨指點,有不足之處,請指出!有疑問,請指出,喜歡它,請支持!
https://github.com/androllen/WpfNetCoreLocalization
https://github.com/Jinjinov/wpf-localization-multiple-resource-resx-one-language/blob/master/README.md
https://codinginfinity.me/post/2015-05-10/localization_of_a_wpf_app_the_simple_approach