How to create Site (SPWeb) on Sharepoint Online

Question

I have a problem creating Sites on Sharepoint Online. The code that works on-premise do not work on Sharepoint Online.

I do not want to bother you with the code, i just want a clean start.

So my question is:

How do you create a site on Sharepoint Online programmatically?

--------------EDIT--------------

Here is the code - It works on on-premise:

using System;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;

namespace EventReceiverProject1.EventReceiver1
{
    /// <summary>
    /// List Item Events
    /// </summary>
    public class EventReceiver1 : SPItemEventReceiver
    {
       /// <summary>
       /// An item is being added.
       /// </summary>
       public override void ItemAdding(SPItemEventProperties properties)
       {
           base.ItemAdding(properties);

           DateTime dt = DateTime.Now;
           String strDate = "";
           strDate = dt.ToString("HH.mm.ss");

           properties.AfterProperties["Title"] = "Kevi2n Changed by event receiver at" + strDate;


               SPWeb createWebsite;
               SPWeb _w = properties.Web;
               SPWebTemplate spWebTemplate = _w.Site.GetWebTemplates(1030)["STS#1"];
               string title = properties.AfterProperties["Title"].ToString();
               createWebsite = _w.Webs.Add(title, title, "Sagwebsted omkring " + title, 1030, SPWebTemplate.WebTemplateSTS, false, false);
               // SPContentType obsolete = _w.ContentTypes[SPContentTypeId("0x01")];



       }


    }
}

------------EDIT 2 -----------

using System;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;

namespace EventReceiverProject1.EventReceiver1
{
    /// <summary>
    /// List Item Events
    /// </summary>
    public class EventReceiver1 : SPItemEventReceiver
    {
       /// <summary>
       /// An item is being added.
       /// </summary>
       public override void ItemAdding(SPItemEventProperties properties)
       {
           base.ItemAdding(properties);


       }

       /// <summary>
       /// An item was added
       /// </summary>
       public override void ItemAdded(SPItemEventProperties properties)
       {
           base.ItemAdded(properties);

           DateTime dt = DateTime.Now;
           String strDate = "";
           strDate = dt.ToString("HH.mm.ss");

           properties.ListItem["Title"] = "Kevi2n Changed by event receiver at" + strDate;
           properties.ListItem.Update();
           //properties.AfterProperties["Title"] = "Kevi2n Changed by event receiver at" + strDate;


           SPWeb createWebsite;
           SPWeb _w = properties.Web;
           SPWebTemplate spWebTemplate = _w.Site.GetWebTemplates(1030)["STS#1"];
           string title = properties.ListItem["Title"].ToString();
           createWebsite = _w.Webs.Add(title, title, "Sagwebsted omkring " + title, 1030, SPWebTemplate.WebTemplateSTS, false, false);
           // SPContentType obsolete = _w.ContentTypes[SPContentTypeId("0x01")];

       }


    }
}

A link to the Visual Studio File. https://docs.google.com/file/d/0B9A1BCW2haAxaU03bUdtRVpScnM/edit?pli=1

Answer 1

Try this:

SPWeb createWebsite;
SPWeb _w = properties.Web;
SPWebTemplate spWebTemplate = _w.Site.GetWebTemplates(1030)["STS#1"];
string title = properties.ListItem["Title"].ToString();

_w.AllowUnsafeUpdates = true;           
createWebsite = _w.Webs.Add(title, title, "Sagwebsted omkring " + title, 1030, SPWebTemplate.WebTemplateSTS, false, false);
_w.update();
_w.AllowUnsafeUpdates = false;

Answer 2

This is likely due to lack of permissions. In SharePoint-online we also can't use RunWithElevatedPrivileges, which executes the specified method with Full Control rights even if the user does not otherwise have Full Control.

However, you best chance is to develop a custom full trust proxy to complete this task.

See how to write a full trust proxy

Answer 3

I saw your question earlier but could not get a chance to reply. In your code you had done something like this:

SPWeb web = ParentWeb.Webs.Add("param1","param2",...);

However, you had not allowed unsafe updates to the Web under which the sites were being created. Do it like this:

ParentWeb.AllowUnsafeUpdates = true;
SPWeb web = ParentWeb.Webs.Add("param1","param2",...);
ParentWeb.Update()
ParentWeb.AllowUnsafeUpdates = false;

I have previously created sites programmatically in SharePoint Online using thi same approach.