Change the "Make "New Folder" command available?" option with Sharepoint Client Object Model

Question

I got a lot of sites with document libraries where the "Make "New Folder" command available" option is set to "no". I would like to walk through these document libraries and change this to "yes". How can I achieve this? After doing some search, I found that a lot of things can be done with the files in a document library, but did not find any example that shows how to change settings (advanced settings) of the library itself.

Thank you, vm

Answer 1

Since you are looking for solution that utilizes CSOM API, the below example demonstrates how enable folders for document libraries:

using (var ctx = new ClientContext(webUri))
{ 
    var result = ctx.LoadQuery(ctx.Web.Lists.Where(l => l.BaseType == BaseType.DocumentLibrary && !l.Hidden));
    ctx.ExecuteQuery();
    foreach (var list in result)
    {
        list.EnableFolderCreation = true;
        list.Update();
    }
    ctx.ExecuteQuery(); 
}

VB.Net version

Using context As Microsoft.SharePoint.Client.ClientContext = New Microsoft.SharePoint.Client.ClientContext(webUri)
        Dim qry = From l In context.Web.Lists
            Where (CInt(l.BaseType) = 1) AndAlso Not l.Hidden
            Select l
        Dim result As IEnumerable(Of Microsoft.SharePoint.Client.List) = context.LoadQuery(qry)
        context.ExecuteQuery()
        Dim list As Microsoft.SharePoint.Client.List
        For Each list In result
            list.EnableFolderCreation = True
            list.Update()
        Next
        context.ExecuteQuery()

    End Using