将字节数组文件写入 OneDrive

Question

好的，所以我已经想出了如何从OneDrive for Business获取文件并将其写入计算机上的本地目录，使用以下代码：

public static async Task GetFileAsync()
{
var (authResult, message) = await Authentication.AquireTokenAsync();
var httpClient = new HttpClient();
HttpResponseMessage response;
var request = new HttpRequestMessage(HttpMethod.Get, MainPage.fileurl);
request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
response = await httpClient.SendAsync(request);
byte[] fileBytes = await response.Content.ReadAsByteArrayAsync();
StorageLibrary videoLibrary = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Videos);
string saveFolder = videoLibrary.SaveFolder.Path;
string genName = App.Generator;
genName = genName.Replace(" ", "-");
string saveFileName = App.Date + "-" + App.StartTime + "-" + App.IBX + "-" + genName + ".xlsx";
saveLocation = saveFolder + "\" + saveFileName;
using (MemoryStream stream = new MemoryStream())
{
stream.Write(fileBytes, 0, (int)fileBytes.Length);
using (spreadsheetDoc = SpreadsheetDocument.Open(stream, true))
{
await Task.Run(() =>
{
File.WriteAllBytes(saveLocation, stream.ToArray());
return TaskStatus.RanToCompletion;
});
}
}
}

将文件保存在本地计算机上后，我已经能够成功编辑文件并保存编辑内容。

我想出了如何将其转换为字节数组，以及如何在创建数组后删除本地文件夹中编辑的文件。现在，我想将此新编辑的文件(字节数组(写回 OneDrive 子文件夹。

到目前为止，我拥有的代码如下：

public static async Task PutFileAsync()
{
string genName = App.Generator;
genName = genName.Replace(" ", "-");
StorageLibrary videoLibrary = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Videos);
string readFolder = videoLibrary.SaveFolder.Path;
StorageFolder videoFolder = await StorageFolder.GetFolderFromPathAsync(readFolder);
string readFileName = App.Date + "-" + App.StartTime + "-" + App.IBX + "-" + genName + ".xlsx";
StorageFile readFile = await videoFolder.GetFileAsync(readFileName);            

进行了一些更改：

var (authResult, message) = await Authentication.AquireTokenAsync();
var httpClient = new HttpClient();
HttpResponseMessage response;
string posturl = MainPage.spfileurl + readFile.Name + ":/content";
var content = JsonConvert.SerializeObject(readFile);
var request = new HttpRequestMessage(HttpMethod.Put, posturl);
request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
request.Content = new StringContent(content, Encoding.UTF8, "application/json");
response = await httpClient.SendAsync(request);
var responseString = await response.Content.ReadAsStringAsync();
await Task.Run(() =>
{
File.Delete(readFile.Path);
return TaskStatus.RanToCompletion;
});

最后一部分也与我的另一个帖子有关。

Answer 1

您需要将 json 字符串/纯文本作为请求正文传递，而不是二进制数组(在您的情况下，只需读取本地文件的实际内容并将内容传递给 json(。

如果更新文件内容，则可以使用更新 API

另一种方式：先删除云端硬盘中的旧文件，然后上传最新文件。

根据您的代码在MVC上添加一些工作代码(关键点：请求。Content = new ByteArrayContent(：

// Initialize the GraphServiceClient.
GraphServiceClient graphClient = SDKHelper.GetAuthenticatedClient();
var httpClient = new HttpClient();
HttpResponseMessage response;
//string posturl = MainPage.spfileurl + readFile.Name + ":/content";
string posturl = "https://graph.microsoft.com/v1.0/me/drive/root:/Test.docx:/content";
//System.IO.FileStream file = System.IO.File.Open(@"D:TestDocsAllin.docx", FileMode.Open);             
//string text= System.IO.File.ReadAllText(@"D:TestDocsAllin.docx",Encoding.Unicode);
//var content = JsonConvert.SerializeObject(file);
var request1 = new HttpRequestMessage(HttpMethod.Put, posturl);
string accessToken = await SampleAuthProvider.Instance.GetUserAccessTokenAsync();
request1.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
//request1.Content = new StringContent(content, Encoding.UTF8, "application/json");
request1.Content = new ByteArrayContent(System.IO.File.ReadAllBytes(@"D:TestDocsAllin.docx"));//  StringContent(text, Encoding.UTF8); 
response = await httpClient.SendAsync(request1);
var responseString = await response.Content.ReadAsStringAsync();
await Task.Run(() =>
{
// System.IO.File.Delete(readFile.Path);
return TaskStatus.RanToCompletion;
});