SharePoint via web services: how to add attachments?

Question

Adding a list item via the SharePoint web service model, any idea how to add an attachment to the list item?

Answer 1

wsLists.AddAttachment(this.ListName, listItemID, safeFileName(attachment.Name), File.ReadAllBytes(attachment.FullName));

safeFileName function =

 private string safeFileName(string filename)
        {
            filename = filename.Replace(@"\", "");
            filename = filename.Replace(@"/", "");
            filename = filename.Replace(@":", "");
            filename = filename.Replace(@"*", "");
            filename = filename.Replace(@"?", "");
            filename = filename.Replace(@"""", "");
            filename = filename.Replace(@"<", "");
            filename = filename.Replace(@">", "");
            filename = filename.Replace(@"|", "");
            filename = filename.Replace(@"#", "");
            filename = filename.Replace(@"{", "");
            filename = filename.Replace(@"}", "");
            filename = filename.Replace(@"%", "");
            filename = filename.Replace(@"~", "");
            filename = filename.Replace(@"&", "");
            return filename; 
        }