Create folder in SharePoint Online without using SharePoint Client Model in C#

Question

In C#, I want to create a folder in my SharePoint Online site without using SharePoint client object model.

I am trying to use SharePoint REST APIs and List methods.

I don't want to use Microsoft.SharePoint.Client as the use of this DLL requires SharePoint Client Components to be installed on the client server.

I have found the this useful link to achieve this. This works fine for SharePoint On-premise instance, but not for SharePoint Online.

It throws the following error message when run for SharePoint Online

Server was unable to process request. ---> Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).

Is there any way to solve this problem?

Answer 1

Endpoint URI

http://<site url>/_api/web/folders (top-level folders at the root site)

http://<site url>/_api/web/getfolderbyserverrelativeurl('/<folder name>')/folders

Create a folder (POST request example)

executor.executeAsync({
  url: "<app web url>/_api/SP.AppContextSite(@target)/web
    /getfolderbyserverrelativeurl('/Shared Documents/Folder A')/folders
    ?@target='<host web url>'",
  method: "POST",
  body: "{ '__metadata':{ 'type': 'SP.Folder' }, 'ServerRelativeUrl':'Folder B' }",
  headers: {
    "accept": "application/json; odata=verbose",
    "content-type": "application/json; odata=verbose"
  },
  success: successHandler,
  error: errorHandler
});

Please refer this link