Windows Phone 中的自定义跳转列表

Question

我一直在看这个：http://code.msdn.microsoft.com/wpapps/Custom-LongList-Selector-bf8cb9ad 并试图将其整合到我的应用中。但是，它有点令人困惑，因为我的数据加载方式不同。现在，我有两个错误 CustomKeyGroup<.viewmodels.sounddata>.GetSoundGroups(System.Collections.Generic.List<.viewmodels.sounddata>)' 的最佳重载方法匹配有一些无效参数

参数 1：无法从 'string' 转换为 'System.Collections.Generic.List'

错误出现在 'CustomKeyGroup.GetSoundGroups(mvm.Items);'来自 mainpage.cs。我知道这些项目是一个问题。如果您查看链接，他们会使用 listmovie.add 以不同方式加载数据。

我知道有些事情搞砸了，但由于我的数据加载不同，我正在努力让它正常工作。

我希望在我的 SoundModel 中按组（Alpha、Bravo 等）提供带有标题的自定义跳转列表。这是一部分：

namespace T.ViewModels
{
    public class SoundModel: BindableBase
    {
        public SoundGroup NewAdds { get; set; }
        public SoundGroup Software { get; set; }

        }

        public bool IsDataLoaded { get; set; }



        public void LoadData()
        {
            // Load data into the model
            Software = CreateSoftwareGroup();
            NewAdds = CreateNewAddsGroup();


            IsDataLoaded = true;
        }

        private SoundGroup CreateNewAddsGroup()
        {
            SoundGroup data = new SoundGroup();
            data.Title = "New";
            string basePath = "assets/audio/newadds/";

               data.Items.Add(new SoundData
            {
                Title = "Test1",
                FilePath = basePath + "Test.mp3",
                Groups = "Alpha"
            });



            data.Items.Add(new SoundData
            {
                Title = "Test2",
                FilePath = basePath + "Test2.mp3",
                Groups="Bravo"
            });


            data.Items.Add(new SoundData
            {
                Title = "Test3",
                FilePath = basePath + "Test3.mp3",
                Groups= "Zulu"
            });

  private SoundGroup CreateSoftwareGroup()
        {
            SoundGroup data = new SoundGroup();

            data.Title = "Software";
            string basePath = "assets/audio/Software/";

            data.Items.Add(new SoundData
            {
                Title = "Test1",
                FilePath = basePath + "Test.mp3",
                Groups = "Alpha"
            });

            data.Items.Add(new SoundData
            {
                Title = "Test2",
                FilePath = basePath + "Test2.mp3",
                Groups="Bravo"
            });


            data.Items.Add(new SoundData
            {
                Title = "Test3",
                FilePath = basePath + "Test3.mp3",
                Groups= "Zulu"
            });

这里是相关的mainpage.cs：

SoundData mvm = new SoundData();

            this.LongList.ItemsSource = CustomKeyGroup<SoundData>.GetSoundGroups(mvm.Items);

声音组：

{
    public class SoundGroup
    {
        public SoundGroup()
        {
            Items = new List<SoundData>();
        }

        public List<SoundData> Items { get; set; }
        public string Title { get; set; }
        public string Groups { get; set; }

    }
}

声音数据：

{
    public class SoundData : ViewModelBase
    {
        public string Title { get; set; }
        public string FilePath { get; set; }
        public string Items { get; set; }
        public string Groups { get; set; }


        public RelayCommand<string> SaveSoundAsRingtone { get; set; }


        private void ExecuteSaveSoundAsRingtone(string soundPath)
        {
            App.Current.RootVisual.Dispatcher.BeginInvoke(() =>
            {
                SaveRingtoneTask task = new SaveRingtoneTask();
                task.Source = new Uri("appdata:/" + this.FilePath);
                task.DisplayName = this.Title;
                task.Show();
            }
                );
        }   

        public SoundData()
        {
            SaveSoundAsRingtone = new RelayCommand<string>(ExecuteSaveSoundAsRingtone);
        }

    }
}

Answer 1

到目前为止，我可以看到你应该调用如下函数

SoundModel svm = new SoundModel();
svm.LoadData();

this.LongList.ItemsSource = CustomKeyGroup<SoundData>.GetSoundGroups(svm.Software.Items);

或

this.LongList.ItemsSource = CustomKeyGroup<SoundData>.GetSoundGroups(svm.NewAdds.Items);

原因是您需要在方法GetSoundGroups 中传递Generic.List<.ViewModels.SoundData>，并且列表包含在SoundGroup 类中。由于您加载的数据在 SoundModel 类中，所以我可能只能想到上述实现。