Can you programmatically add comments to an append-only comment field in a custom item list using C#?

Question

I understand that you can access comments in an append-only field like:

    public string retrieveComments(SPListItem item)
    {
        SPListItemVersionCollection versions = item.Versions;
        string latestComment = "";

        try
        {
            foreach (SPListItemVersion itemVersion in versions)
            {
                if (itemVersion.IsCurrentVersion)
                {
                    latestComment = itemVersion["Comments"].ToString().Trim();

                }
            }
        }
        catch (Exception e3)
        {
            //handles exception
        }

        return latestComment;
    }

Is there any way to create a new version of the list item and append a comment as the latest comment through C#?

My goal is for someone to email the list and take the body of their email and append it as a comment.

Answer 1

You don't need to go through the Versions to get the latest value. That's the current value:

item["Comments"].ToString().Trim();

To add a new comment just update the item:

item["Comments"] = "This is now the latest comment";
item.Update();

Answer 2

Here is an example:

 List<Message> msgs = new List<Message>
            {
                new Message{Comments=new List<string>{"AS"},IsCurrent=false},
                new Message{Comments=new List<string>{"ASfff"},IsCurrent=true},
            };

            var ress = msgs.Where(ms => ms.IsCurrent); 


            foreach (var ms in ress)
            {
                ms.Comments.Add("Hello");
            }

Answer 3

Posted this on sharepoint.stackexchange.com

The answer is simple (which makes me look stupid), and I'm pretty sure I tried it before with no avail, but here it is:

Can you add comments to an append-only field in a list in Sharepoint 2010 using C#?