WebExtensions.CreateWeb – This CSOM extension method from PnP Core Component used to create a new sub-site under the parent web in SharePoint.

Supports: SharePoint 2013+, SharePoint Online

Assembly: OfficeDevPnP.Core.dll
Namespace: Microsoft.SharePoint.Client

There are two extension CreateWeb methods are provided in PnP Core Component for creating a subsite under WebExtensions class.

Method 1:

Web CreateWeb(SiteEntity subsite, bool inheritPermissions = true, bool inheritNavigation = true)

Parameters:

Parameter Type Description
subsite string Details of the Web (site) to add. Only Title, Url (as the leaf URL), Description, Template and Language are used.
inheritPermissions bool Specifies whether the new site will inherit permissions from its parent site. Default value is true.
inheritNavigation bool Specifies whether the site inherits navigation. Default value is true.

Example:

The following code snippet example used to add a new subsite “Sample Site” with url “/samplesite” under the root website in SharePoint. And the newly added site is not inhering permissions and navigation from parent site.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using OfficeDevPnP.Core;

// Assembly Reference Used: OfficeDevPnP.Core, Version=2.4.1605.0, Culture=neutral, PublicKeyToken=3751622786b357c2
namespace SampleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            string siteUrl = "https://sharepointonline.sharepoint.com";   
	     bool isInheritPermissions = false;
            bool isInheritNavigation = false;        

            AuthenticationManager authManager = new AuthenticationManager();
            //Interactive Login to SharePoint site - Opens a Online signin page to authenticate the user
            var context = authManager.GetWebLoginClientContext(siteUrl);            

            Web web = context.Site.RootWeb.CreateWeb(
                        new OfficeDevPnP.Core.Entities.SiteEntity()
                        {
                            Title = "Sample Site",
                            Url = "samplesite",
                            Description = "Site creating for testing purpose",
                            Template = "STS#0",
                            Lcid = 1033
                        }, isInheritPermissions, isInheritNavigation);
            Console.WriteLine(web.Title + " site created successfully!");

            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }        
    }
}
//OUTPUT:
//Sample Site site created sucessfully!
//Press any key to exit.

Method 2:

Web CreateWeb(string title, string leafUrl, string description, string template, int language, bool inheritPermissions = true, bool inheritNavigation = true)

Parameters:

Parameter Type Description
title string The title of the new site.
leafUrl string A string that represents the URL leaf name.
description string The description of the new site.
template string The name of the site template to be used for creating the new site.
language int The locale ID that specifies the language of the new site.
inheritPermissions bool Specifies whether the new site will inherit permissions from its parent site. Default value is true.
inheritNavigation bool Specifies whether the site inherits navigation. Default value is true.

Example:

The following code snippet example used to add a new subsite “Sample Site” with url “/samplesite” under the root website in SharePoint. And the newly added site is not inhering permissions and navigation from parent site.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using OfficeDevPnP.Core;

// Assembly Reference Used: OfficeDevPnP.Core, Version=2.4.1605.0, Culture=neutral, PublicKeyToken=3751622786b357c2
namespace SampleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            string siteUrl = "https://sharepointonline.sharepoint.com";   
	     bool isInheritPermissions = false;
            bool isInheritNavigation = false;        

            AuthenticationManager authManager = new AuthenticationManager();
            //Interactive Login to SharePoint site - Opens a Online signin page to authenticate the user
            var context = authManager.GetWebLoginClientContext(siteUrl);            

            Web web = context.Site.RootWeb.CreateWeb(
                       "Sample Site",
                       "samplesite",
                       "Site creating for testing purpose",
                       "STS#0", 1033, isInheritPermissions, isInheritNavigation);

            Console.WriteLine(web.Title + " site created successfully!");

            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }        
    }
}
//OUTPUT:
//Sample Site site created successfully!
//Press any key to exit.