Microsoft.SharePoint.Client.ServerUnauthorizedAccessException: Access denied - sharepoint

Question

I encountered an exception when I used c# code to create subdirectories in sharepoint's specified directory.
Exception message:
Microsoft.SharePoint.Client.ServerUnauthorizedAccessException: Access denied. You do not have permission to perform this action or access this resource.
Anybody can help me? thanks!
The following is parameters:
file: D:\Repos\helpfilesync\ArtefactUploader\bin\Release\ArtefactUploader.exe
fileName: ArtefactUploader.exe
uploadPath: /sites/Platform/Shared Documents/dailybuild/helpfilesync/
subFolderPath: v0.1.0/
public void Upload()
{
using (ClientContext clientContext = new ClientContext("*****"))
{
SecureString pass = new SecureString();
foreach (char ch in password)
{
pass.AppendChar(ch);
}
clientContext.Credentials = new SharePointOnlineCredentials(user, pass);
Web web = clientContext.Web;
clientContext.Load(web);
clientContext.ExecuteQuery();
if (!string.IsNullOrWhiteSpace(this.subFolderPath))
{
CreateFolder(clientContext.Web, uploadPath, subFolderPath);
}
using (FileStream fs = new FileStream(file, FileMode.Open))
{
Microsoft.SharePoint.Client.File.SaveBinaryDirect
(clientContext, $"{this.uploadPath}{this.subFolderPath}/{fileName}", fs, true);
}
Console.WriteLine("Uploaded File Successfully");
}
}
public void CreateFolder(Web web, string relativePath, string fullFolderPath)
{
if (web == null)
{
throw new ArgumentNullException(nameof(web));
}
if (string.IsNullOrWhiteSpace(relativePath))
{
throw new ArgumentNullException(nameof(relativePath));
}
if (string.IsNullOrWhiteSpace(fullFolderPath))
{
throw new ArgumentNullException(fullFolderPath);
}
Folder relativeFolder = web.GetFolderByServerRelativeUrl(relativePath);
CreateFolderInternal(web, relativeFolder, fullFolderPath);
}
public static Folder CreateFolderInternal(Web web, Folder parentFolder, string fullFolderPath)
{
var folderUrls = fullFolderPath.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
string folderUrl = folderUrls[0];
var curFolder = parentFolder.Folders.Add(folderUrl);
//web.Context.Load(curFolder);
try
{
web.Context.ExecuteQuery();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
if (folderUrls.Length > 1)
{
var folderPath = string.Join("/", folderUrls, 1, folderUrls.Length - 1);
return CreateFolderInternal(web, curFolder, folderPath);
}
return curFolder;
}
Microsoft.SharePoint.Client.ServerUnauthorizedAccessException: Access
denied. You do not have permission to perform this action or access
this resource. at
Microsoft.SharePoint.Client.ClientRequest.ProcessResponseStream(Stream
responseStream) at
Microsoft.SharePoint.Client.ClientRequest.ProcessResponse() at
Microsoft.SharePoint.Client.ClientContext.ExecuteQuery() at
ArtefactUploader.SharepointUploader.CreateFolderInternal(Web web,
Folder parentFolder, String fullFolderPath) in
D:\Repos\helpfilesync\ArtefactUploader\SharepointUploader.cs:line 96

Answer 1

Did test of your code, works fine. Make sure the user/password is correct.
class Program
{
const string user = "user#teanat.onmicrosoft.com";
const string password = "password";
public static void Upload()
{
using (ClientContext clientContext = new ClientContext("https://tenant.sharepoint.com/sites/lee"))
{
SecureString pass = new SecureString();
foreach (char ch in password)
{
pass.AppendChar(ch);
}
clientContext.Credentials = new SharePointOnlineCredentials(user, pass);
Web web = clientContext.Web;
clientContext.Load(web);
clientContext.ExecuteQuery();
if (!string.IsNullOrWhiteSpace("a"))
{
CreateFolder(clientContext.Web, "/sites/lee/mydoc2", "childA");
}
//using (FileStream fs = new FileStream(file, FileMode.Open))
//{
// Microsoft.SharePoint.Client.File.SaveBinaryDirect
// (clientContext, $"{this.uploadPath}{this.subFolderPath}/{fileName}", fs, true);
//}
Console.WriteLine("Uploaded File Successfully");
}
}
public static void CreateFolder(Web web, string relativePath, string fullFolderPath)
{
if (web == null)
{
throw new ArgumentNullException(nameof(web));
}
if (string.IsNullOrWhiteSpace(relativePath))
{
throw new ArgumentNullException(nameof(relativePath));
}
if (string.IsNullOrWhiteSpace(fullFolderPath))
{
throw new ArgumentNullException(fullFolderPath);
}
Folder relativeFolder = web.GetFolderByServerRelativeUrl(relativePath);
CreateFolderInternal(web, relativeFolder, fullFolderPath);
}
public static Folder CreateFolderInternal(Web web, Folder parentFolder, string fullFolderPath)
{
var folderUrls = fullFolderPath.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
string folderUrl = folderUrls[0];
var curFolder = parentFolder.Folders.Add(folderUrl);
//web.Context.Load(curFolder);
try
{
web.Context.ExecuteQuery();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
if (folderUrls.Length > 1)
{
var folderPath = string.Join("/", folderUrls, 1, folderUrls.Length - 1);
return CreateFolderInternal(web, curFolder, folderPath);
}
return curFolder;
}
static void Main(string[] args)
{
Upload();
}
}