Kepler-Release/Venus/Venus_MainPages/ViewModels/TopViewModel.cs

using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace Venus_MainPages.ViewModels
{
    internal class TopViewModel : BindableBase
    {
        #region 私有字段
        private string m_Title;
        #endregion

        #region  属性
        public string Title
        {
            get { return m_Title; }
            set { SetProperty(ref m_Title, value); }
        }
        #endregion

        #region 命令
        private DelegateCommand _SwichLanguageCommand;
        public DelegateCommand SwichLanguageCommand =>
                 _SwichLanguageCommand ?? (_SwichLanguageCommand = new DelegateCommand(OnSwitchLanguage));
        #endregion

        #region 构造函数
        public TopViewModel()
        {
            Title = "Venus";
        }
        #endregion

        #region 方法
        private void OnSwitchLanguage()
        {
            List<ResourceDictionary> dictionaryList = new List<ResourceDictionary>();
            foreach (ResourceDictionary dictionary in Application.Current.Resources.MergedDictionaries)
            {
                if (dictionary.Source != null)
                {
                    dictionaryList.Add(dictionary);
                }
            }
            string requestedCulture1 = @"/Venus_Themes;component/Languages/StringResources.en-US.xaml";
            string requestedCulture2 = @"/Venus_Themes;component/Languages/StringResources.zh-CN.xaml";
            ResourceDictionary resourceDictionary1 = dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture1));
            ResourceDictionary resourceDictionary2 = dictionaryList.FirstOrDefault(d => d.Source.OriginalString.Equals(requestedCulture2));
            if (dictionaryList.IndexOf(resourceDictionary1) < dictionaryList.IndexOf(resourceDictionary2))
            {
                Application.Current.Resources.MergedDictionaries.Remove(resourceDictionary1);
                Application.Current.Resources.MergedDictionaries.Add(resourceDictionary1);
            }
            else
            {
                Application.Current.Resources.MergedDictionaries.Remove(resourceDictionary2);
                Application.Current.Resources.MergedDictionaries.Add(resourceDictionary2);
            }
        }
        #endregion

    }
}