c# – OneDrive上传/下载到指定目录

我正在尝试使用Live SDK(v5.6)在我的Windows Phone 8.1 Silverlight应用程序中包含OneDrive的备份/恢复.我可以读/写标准的“me / skydrive”目录,但我正在寻找一种上传/下载到指定目录的方法.我可以创建文件夹,如果它不存在没问题.

我一直在尝试下面没有运气.

var res = await _client.UploadAsync("me/skydrive/mydir", fileName, isoStoreFileStream, OverwriteOption.Overwrite);

我也试过获取目录ID并传入它.

var res = await _client.UploadAsync("me/skydrive/" + folderId, fileName, isoStoreFileStream, OverwriteOption.Overwrite);

相同的错误..我收到’mydir’或者不支持id …

“{request_url_invalid：Microsoft.Live.LiveConnectException：URL包含路径’mydir’,不受支持.”

有什么建议？如果你建议上传同步的答案,你还可以包括我如何从指定的目录下载我的文件？谢谢！

解决方法:

这是一个扩展方法,用于检查是否创建了文件夹,并且：

>如果创建,则返回文件夹ID.
>如果未创建,则创建它并返回文件夹ID.

然后,您可以使用此ID上传到该文件夹​​并从该文件夹下载.

public async static Task<string> CreateDirectoryAsync(this LiveConnectClient client,
string folderName, string parentFolder)
    {
        string folderId = null;

        // Retrieves all the directories.
        var queryFolder = parentFolder + "/files?filter=folders,albums";
        var opResult = await client.GetAsync(queryFolder);
        dynamic result = opResult.Result;

        foreach (dynamic folder in result.data)
        {
            // Checks if current folder has the passed name.
            if (folder.name.ToLowerInvariant() == folderName.ToLowerInvariant())
            {
                folderId = folder.id;
                break;
            }
        }

        if (folderId == null)
        {
            // Directory hasn't been found, so creates it using the PostAsync method.
            var folderData = new Dictionary<string, object>();
            folderData.Add("name", folderName);
            opResult = await client.PostAsync(parentFolder, folderData);
            result = opResult.Result;

            // Retrieves the id of the created folder.
            folderId = result.id;
        }

        return folderId;
    }

然后你用它作为：

string skyDriveFolder = await CreateDirectoryAsync(liveConnectClient, "<YourFolderNameHere>", "me/skydrive");

现在,skyDriveFolder具有上传和下载时可以使用的文件夹ID.这是一个示例上传：

LiveOperationResult result = await liveConnectClient.UploadAsync(skyDriveFolder, fileName,
                                                  fileStream, OverwriteOption.Overwrite);

添加以完成YnotDraw的回答

使用您提供的内容,以下是如何通过指定文件名来下载文本文件.下面不包括是否找不到文件和其他潜在的例外情况,但这里有什么在星星正确对齐时有效：

public async static Task<string> DownloadFileAsync(this LiveConnectClient client, string directory, string fileName)
    {
        string skyDriveFolder = await OneDriveHelper.CreateOrGetDirectoryAsync(client, directory, "me/skydrive");
        var result = await client.DownloadAsync(skyDriveFolder);

        var operation = await client.GetAsync(skyDriveFolder + "/files");

        var items = operation.Result["data"] as List<object>;
        string id = string.Empty;

        // Search for the file - add handling here if File Not Found
        foreach (object item in items)
        {
            IDictionary<string, object> file = item as IDictionary<string, object>;
            if (file["name"].ToString() == fileName)
            {
                id = file["id"].ToString();
                break;
            }
        }

        var downloadResult= await client.DownloadAsync(string.Format("{0}/content", id));

        var reader = new StreamReader(downloadResult.Stream);
        string text = await reader.ReadToEndAsync();
        return text;
    }

在使用中：

var result = await DownloadFile(_client, "MyDir", "backup.txt");

标签：c,live-sdk,onedrive,live-connect-sdk
来源： https://codeday.me/bug/20190716/1477309.html