Uploading file from code error “File Not found” - sharepoint

Question

I m uploading file to Sharepoint online dcoument librar from byte array and on execution getting error "File Not found"
public static bool UploadFile(SP sp, string folderName, string fileNameWithExtension, byte[] fileContent, TraceWriter log)
{
bool result = false;
try
{
SecureString securePwd = new SecureString();
char[] pwdarray = sp.pwd.ToCharArray();
foreach (var item in pwdarray)
{
securePwd.AppendChar(item);
}
SharePointOnlineCredentials creds = new SharePointOnlineCredentials(sp.id, securePwd);
using (ClientContext clientContext = new ClientContext(sp.url))
{
log.Info("UploadToSharePoint 1");
clientContext.Credentials = creds;
clientContext.AuthenticationMode = ClientAuthenticationMode.Default;
Web web = clientContext.Web;
var fileCreationInformation = new FileCreationInformation();
fileCreationInformation.Content = fileContent;
fileCreationInformation.Overwrite = true;
fileCreationInformation.Url = fileNameWithExtension;
Microsoft.SharePoint.Client.List docs = web.Lists.GetByTitle("All Attachments");
docs.RootFolder.Folders.Add(folderName);
Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(fileCreationInformation);
clientContext.ExecuteQuery();
return result = true;
}
}
catch (Exception ex)
{
throw ex;
}
}
Please help spent 2 days but not finding a solution :(

Answer 1

Below sample code works for me.
using (var context = new ClientContext("https://domain.sharepoint.com/sites/Developer"))
{
Console.ForegroundColor = ConsoleColor.Green;
string password = "pw";
SecureString sec_pass = new SecureString();
Array.ForEach(password.ToArray(), sec_pass.AppendChar);
sec_pass.MakeReadOnly();
context.Credentials = new SharePointOnlineCredentials("lee#domain.onmicrosoft.com", sec_pass);
string fileName = "C:\\Lee\\test.docx";
FileStream stream = System.IO.File.OpenRead(fileName);
byte[] fileBytes = new byte[stream.Length];
stream.Read(fileBytes, 0, fileBytes.Length);
stream.Close();
var fileCreationInformation = new FileCreationInformation();
fileCreationInformation.Content = fileBytes;
fileCreationInformation.Overwrite = true;
fileCreationInformation.Url = "test.docx";
Microsoft.SharePoint.Client.List docs = context.Web.Lists.GetByTitle("MyDoc3");
Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(fileCreationInformation);
context.ExecuteQuery();
Console.WriteLine("done");
Console.ReadKey();
}