在微软官方提供的资源中，我们可以看到SampleDataSource.cs已经拥有了定义好了相应的数据结构以及实现类：
建立本地数据
由于我们已经有数据以及相应的数据类，我们需要做的仅仅是将数据放进数据类中，并在数据源的构造函数中调用它：
首先定义一个方法，用来绑定本地数据：
public SampleDataSource()
{
// Loca local data
GetLocalFiles();
}
为了使界面运行起来不影响效果，需要通过添加async关键字来进行操作。
其余解析均用注释的方式表示在代码中：
public async Task GetLocalFiles()
{
string folderIndex = "Index_"; // Foler filter
var Path = @"Data"; //Binding Folder var Folders = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync(Path).GetResults().GetFoldersAsync(); //对于每个folder分别取出
foreach (var folder in Folders)
{
var group = new SampleDataGroup(folder.Name, folder.Name, "", "", "");
var files = await folder.GetFilesAsync(); //对每个文件也需要分别取出
foreach (var file in files)
{
//判断文件类型是否为文本形式
if (!file.FileType.Equals(TXTFILEEXTENSION))
{
string filename = file.Name.Split(new char[] { '.' })[]; //判断文件名是否包括_index
if (filename.Contains(folderIndex))
{
group.SetImage("/" + Path + "/" + folder.Name + "/" + file.Name);
}
else
{
var pictureItem = new SampleDataItem(filename, filename, "",
"/" + Path + "/" + folder.Name + "/" + file.Name, "", "", group);
group.Items.Add(pictureItem);
}
}
} //文本情况的操作
foreach (var file in files)
{
if (file.FileType.Equals(TXTFILEEXTENSION))
{
string filename = file.Name.Split(new char[] { '.' })[];
if (filename.Contains("Index_"))
{
group.Description = await Windows.Storage.FileIO.ReadTextAsync(file);
}
else
{
var item = group.Items.First<SampleDataItem>(i => i.Title.Split(new char[] { '.' })[] == filename);
item.Description = item.Content = await Windows.Storage.FileIO.ReadTextAsync(file);
}
}
}
//最后把所有数据绑定到AllGroups中
_sampleDataSource.AllGroups.Add(group);
}
}
建立SKYDRIVE数据
首先，在SKYDRIVE中存入同名的文件，并在本地进行reference。同时需要注意的是：我们需要在网上下载一个LIVE SDK，具体操作如下：
- 在 http://msdn.microsoft.com/en-US/live/ff621310 页面 下载Live SDK并安装。
- 在你的工程里面引用此Live SDK。
- 进入https://manage.dev.live.com/build?wa=wsignin1.0，配置你的项目可以调用SKYDRIVE SDK,注意在STEP3中，我们只有Package Name可以填入，其他两个可以忽视
然后写代码读取数据，并在构造函数中调用InitAuth()方法(请先将GetLocalFiles（）注释掉)
微软官网给出的代码修改如下：
#region GetRemote Files
private async void InitAuth()
{
if (!Windows.ApplicationModel.DesignMode.DesignModeEnabled)
{
LiveAuthClient authClient = new LiveAuthClient();
LiveLoginResult authResult = await authClient.LoginAsync(new List<string>() { "wl.signin", "wl.skydrive" });
if (authResult.Status == LiveConnectSessionStatus.Connected)
{
App.Session = authResult.Session;
}
// Forece to logout then login
authClient.Logout();
authResult = await authClient.LoginAsync(new List<string>() { "wl.signin", "wl.skydrive" });
LoadProfile();
}
} private async void LoadProfile()
{
// We may use this code later, but comment them here.
//LiveConnectClient client = new LiveConnectClient(App.Session);
//LiveOperationResult liveOpResult = await client.GetAsync("me");
//dynamic dynResult = liveOpResult.Result;
//App.UserName = dynResult.name;
LoadData();
} public async void LoadData()
{
LiveConnectClient client = new LiveConnectClient(App.Session); LiveOperationResult albumOperationResult = await client.GetAsync("me/albums");
dynamic albumResult = albumOperationResult.Result;
foreach (dynamic album in albumResult.data)
{
if (album.name == "TravelJourney")
{
LiveOperationResult travelJourneyOperationResult = await client.GetAsync(album.id + "/files");
dynamic travelJourneyResult = travelJourneyOperationResult.Result;
foreach (dynamic subalbum in travelJourneyResult.data)
{
var group = new SampleDataGroup(subalbum.id, subalbum.name, "", @"ms-appx:///Assets/DarkGray.png", subalbum.description);
LiveOperationResult pictureOperationResult = await client.GetAsync(subalbum.id + "/files");
dynamic pictureResult = pictureOperationResult.Result; foreach (dynamic picture in pictureResult.data)
{
if (!picture.name.EndsWith(".txt"))
{
if (picture.name.Contains("Index_"))
{
group.SetImage(picture.source);
}
else
{
var pictureItem = new SampleDataItem(picture.id, picture.name, "", picture.source, picture.description, picture.description, group);
group.Items.Add(pictureItem);
}
}
} foreach (dynamic picture in pictureResult.data)
{
if (picture.name.EndsWith(".txt"))
{ string filename = picture.name.Split(new char[] { '.' })[];
StorageFile file = await DownLoadTxtFile(picture.id, picture.name);
string description = await Windows.Storage.FileIO.ReadTextAsync(file);
if (filename.Contains("Index_"))
{
group.Description = description;
}
else
{
var item = group.Items.First<SampleDataItem>(i => i.Title.Split(new char[] { '.' })[] == filename);
item.Description = item.Content = description;
}
}
}
this.AllGroups.Add(group);
}
}
}
} /// <summary>
/// Simply check whether file exists.
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
async Task<bool> DoesFileExistAsync(string fileName)
{
try
{
await Windows.Storage.ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
return true;
}
catch
{
return false;
}
} /// <summary>
/// Download file if description file does not exist.
/// </summary>
/// <param name="fileid"></param>
/// <param name="filename"></param>
/// <returns></returns>
private async Task<StorageFile> DownLoadTxtFile(string fileid, string filename)
{
var fileExists = await DoesFileExistAsync(filename);
if (fileExists)
{
return await Windows.Storage.ApplicationData.Current.LocalFolder.GetFileAsync(filename);
}
else
{
StorageFile file = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFileAsync(filename);
LiveConnectClient client = new LiveConnectClient(App.Session);
await client.BackgroundDownloadAsync(fileid + "/content", file);
return file;
}
}
#endregion
本文部分内容BITED了解的也不是很深入。待进一步了解再给出更详细的经验解说。
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