Add items to Sharepoint Online list using Web Service provided by sharepoint

Question

I want to add a new item to a sharepoint list using /_vti_bin/Lists.asmx web service.

I have used the following code

        SharePointListService.Lists currentListService = new SharePointListService.Lists();
        currentListService.Credentials = new System.Net.NetworkCredential("UserName", "Password");
        XmlDocument doc = new XmlDocument();
        XmlElement batch_element = doc.CreateElement("Batch");
        string item = "<Method ID=\"1\" Cmd=\"New\">" + "<Field Name=\"ID\">New</Field>" + "<Field Name=\"Title\">This is a test</Field>" + "</Method>";
        batch_element.InnerXml = item;
        currentListService.UpdateListItems("Resources", batch_element);

This is giving me an Access Denied Error. Am I doing something wrong in code or is there any other work around to add list item to Sharepoint Online list using /_vti_bin/Lists.asmx webservice.

Answer 1

Finally I got my issue resolved. We can directly authenticate Sharepoint Online site by using the below code

using (ClientContext clientContext = new ClientContext(siteURL))
{
    SecureString passWord = new SecureString();
    foreach (char c in "password".ToCharArray()) passWord.AppendChar(c);
    clientContext.Credentials = new SharePointOnlineCredentials(siteUserName, passWord);
    Web web = clientContext.Web;
    clientContext.Load(web);
}

Here we can use client side object model to authenticate the Sharepoint online site.

Read more about it here:

Authenticating .NET Client Object Model

Answer 2

I don't think you can authorize towards #sharepoint-online via NetworkCredentials - try using claims instead:

How to do active authentication to Office 365 and SharePoint Online