How to approve a folder programmatically in SharePoint

If you want to approve a file programmatically in SharePoint, you have to use the Approve(string comment) method of the SPFile class:

file.Approve(string.Format("This file has been approved the {0}", DateTime.Now));

If you want to approve a folder, it seems obvious that an Approve method also exists in the SPFolder class. Unfortunately, it is not the case. you have to use the ModerationInformation property of the underlying SPListItem:

using (SPSite site = new SPSite("http://server:port/"))

{

    SPWeb web = site.OpenWeb();

    using (web)

    {

        SPList myList = web.Lists["MyList"];

        SPFolder newFolder = myList.RootFolder.SubFolders.Add("folderName");

        SPModerationInformation moderationInformation = newFolder.Item.ModerationInformation;

        moderationInformation.Comment = string.Format("This folder has been approved the {0}",DateTime.Now);

        moderationInformation.Status = SPModerationStatusType.Approved;

        newFolder.Item.Update();

    }

}