Document Library "New" menu changes via code

[Andy Jones]

Hi

Does anyone know if it's possible to change the New menu choices via code (CSOM or PnP Provisioning)? We have custom content types but would like to hide the names of these and instead have word, excel etc..

Thanks

Andy

[#2]

Not with CSOM or PNP to my knowledge. But it might be achievable using an Application Customiser and some CSS to do it.

[#3]

Hi @Andy Jones 

if you need to hide / decide content type order inside new item action, you need to set this property

spList.RootFolder.UniqueContentTypeOrder 

You can follow this approach

List contentTypeNameToHideOnNewButton = new List(); 
//add in list contentTypeNameToHideOnNewButton all ct you want to hide
string ctDefault = "ct default name"
//cut, client context, etc..
clientContext.Load(spList.RootFolder, x => x.ContentTypeOrder);
clientContext.ExecuteQueryRetry();
IList ctoFolder = spList.RootFolder.ContentTypeOrder;
foreach (var item in contentTypeNameToHideOnNewButton)
{

    ContentType contentTypeToHide = spList.GetContentTypeByName(item);
    if (contentTypeToHide != null)
    {

        ContentTypeId idCT = contentTypeToHide.Id;
        int indexCT = ctoFolder.IndexOf(ctoFolder.Where(x => x.StringValue == idCT.StringValue).FirstOrDefault());
        if (indexCT > -1)
        {
            ctoFolder.RemoveAt(indexCT);
        }
    }
}

spList.RootFolder.UniqueContentTypeOrder = ctoFolder;
spList.RootFolder.Update();
spList.Update();

clientContext.Load(spList.RootFolder);
clientContext.ExecuteQueryRetry();

Cheers, Federico

[#4 · Accepted solution]

For anyone else looking I managed to find it. In CSOM there's a property "NewDocumentTemplate" which takes a JSON structure. 

view.NewDocumentTemplates = itemtoset;
view.Update();
await ctx.ExecuteQueryAsync();

See https://petkir.wordpress.com/2018/10/26/change-new-menu-in-sharepoint-online-programmatically/

The same can be set via PNP Provisioning by setting NewDocumentTemplates as part of the default view definition.

Cheers

Andy