We are trying to create a modern site from the provider hosted app in SharePoint 2019.
We have tried creating a modern site using SharePoint in-built(team "STS#3" and communication "SITEPAGEPUBLISHING#0") site collection template, but it creates a classic site. Also, we have tried creating classic team/communication site and added a modern page in that and saved that site as a template. Taking base as that template, we tried creating a modern site, but here also it creates a classic site only.
Environment
[x] SharePoint 2019
Build Name: SharePoint Server 2019 RTM
CU Version: 16.0.10337.12109
Expected or Desired Behavior
We have tried creating a modern site using SharePoint in-built(team "STS#3" and communication "SITEPAGEPUBLISHING#0") site collection template, It should create a modern site.
Observed Behavior
We have tried creating a modern site using SharePoint in-built(team "STS#3" and communication "SITEPAGEPUBLISHING#0") site collection template, but it creates a classic site.
Steps to Reproduce
We are using the below project Reference link for creating this app: https://github.com/SharePoint/PnP/tree/master/Samples/Provisioning.SiteCol.OnPrem
Source code for the code snippet
private string CreateSiteCollection(string hostWebUrl, string url, string template, string title, string adminAccount)
{
// Resolve root site collection URL from host web. We assume that this has been set as the "TenantAdminSite"
string rootSiteUrl = hostWebUrl.Substring(0, 8 + hostWebUrl.Substring(8).IndexOf("/"));
//Resolve URL for the new site collection
var webUrl = string.Format("{0}/sites/{1}", rootSiteUrl, url);
// Notice that this assumes that AdministrationSiteType as been set as TenantAdministration for root site collection
// If this tenant admin URI is pointing to site collection which is host named site collection, code does create host named site collection as well
var tenantAdminUri = new Uri(rootSiteUrl);
string realm = TokenHelper.GetRealmFromTargetUrl(tenantAdminUri);
var token = TokenHelper.GetAppOnlyAccessToken(TokenHelper.SharePointPrincipal, tenantAdminUri.Authority, realm).AccessToken;
using (var adminContext = TokenHelper.GetClientContextWithAccessToken(tenantAdminUri.ToString(), token))
{
var tenant = new Tenant(adminContext);
var properties = new SiteCreationProperties()
{
Url = webUrl,
Owner = adminAccount,
Title = title,
Template = template
};
//start the SPO operation to create the site
SpoOperation op = tenant.CreateSite(properties);
adminContext.Load(op, i => i.IsComplete);
adminContext.ExecuteQuery();
}
// Set theme for the new site
SetThemeToNewSite(webUrl);
// Return URL for redirection
return webUrl;
}
