ClientSidePage.Load issue

[anisiaalexandra]

• PnP Sites Core - https://github.com/OfficeDev/PnP-Sites-Core

Category

[ x ] Bug
[ ] Enhancement

Environment

[ x ] Office 365 / SharePoint Online
[ ] SharePoint 2016
[ ] SharePoint 2013

Expected or Desired Behavior

I have created an Azure function, which connects to a SharePoint Online communication site and tries to load and existing page from the Site Pages lists in order to modify it as per example here https://github.com/SharePoint/PnP/blob/5cde81a38b708a8e0f9d169a42db4514b7332fb6/Samples/Provisioning.ModernPages/Provisioning.ModernPages/Program.cs , but using Certificate and App Permissions instead of username and password.

Observed Behavior

When the execution gets to

ClientSidePage csp = ClientSidePage.Load(ctx, file.Name);

I have the following error:

2019-01-30T09:34:05.538 [Error] Message : Object reference not set to an instance of an object.
2019-01-30T09:34:05.632 [Error] Stack : at OfficeDevPnP.Core.Pages.ClientSidePage.<>c__DisplayClass93_0.b__1(CanvasSection p)
at System.Linq.Enumerable.WhereListIterator1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source)
at OfficeDevPnP.Core.Pages.ClientSidePage.LoadFromHtml(String html, String pageHeaderHtml)
at OfficeDevPnP.Core.Pages.ClientSidePage.Load(ClientContext cc, String pageName)
at Submission#0.Run(String myQueueItem, TraceWriter log) in D:\home\site\wwwroot\QueueTriggerCS\run.csx:line 88.
2019-01-30T09:34:05.663 [Error] Stack : at OfficeDevPnP.Core.Pages.ClientSidePage.<>c__DisplayClass93_0.b__1(CanvasSection p)
at System.Linq.Enumerable.WhereListIterator1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source)
at OfficeDevPnP.Core.Pages.ClientSidePage.LoadFromHtml(String html, String pageHeaderHtml)
at OfficeDevPnP.Core.Pages.ClientSidePage.Load(ClientContext cc, String pageName)
at Submission#0.Run(String myQueueItem, TraceWriter log) in D:\home\site\wwwroot\QueueTriggerCS\run.csx:line 88

Steps to Reproduce

In my Azure function I have the following dependencies:

"{
"frameworks": {
"net46": {
"dependencies": {
"SharePointPnPCoreOnline": "3.3.1811",
"Microsoft.IdentityModel.Clients.ActiveDirectory" : "3.19.8",
"System.Security.Cryptography.X509Certificates" : "4.3.2",
"AngleSharp" : "0.9.9"
}
}
}
}"

The relevant code in the Azure function:

**_OfficeDevPnP.Core.AuthenticationManager authmanager = new OfficeDevPnP.Core.AuthenticationManager();

using (ClientContext ctx = authmanager.GetAzureADAppOnlyAuthenticatedContext(siteUrl, applicationID, tenant, cert2))
{
ctx.Load(ctx.Web);
ListCollection collList = ctx.Web.Lists;

ctx.Load(collList,lists => lists.Include(list => list.Title, list => list.Id));
        
List sitePagesList = ctx.Web.Lists.GetByTitle("Site pages");
ctx.Load(sitePagesList);
ctx.Load(sitePagesList.RootFolder);

try{
    ctx.ExecuteQuery();
            
    ListItem li = sitePagesList.GetItemById(2);
    ctx.Load(li);
    ctx.ExecuteQuery();
	Microsoft.SharePoint.Client.File file = li.File;
    ctx.Load(file, f => f.Name);
    ctx.ExecuteQuery();
    ClientSidePage csp = ClientSidePage.Load(ctx, file.Name);
	}
catch(Exception ex){}

}_**

Thank you in advance for your help as I am new to Azure functions.

Br,
Anisia Pop

[anisiaalexandra]

Hi,

i have to add some more information after some testing:
If I am authenticating with user name and password like bellow, the lines in previous post work just fine
OfficeDevPnP.Core.AuthenticationManager authManager = new OfficeDevPnP.Core.AuthenticationManager();
ClientContext ctx = authManager.GetSharePointOnlineAuthenticatedContextTenant("", "user", "password");

Do I need to do something extra in order for the get with App permissions to work?
Thank you in advance.

Br,
Anisia Pop