kev/Drawer/UCDraw/SigmaDrawerUtil/RecentFileConfig.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GeoSigma.SigmaDrawerUtil
{
    public class RecentFileConfig : XmlConfig
    {
        public override string SectionName {get;set;}= "RecentFiles";
        private int maxFiles = 10;
        public RecentFileConfig()
            : base()
        {
            SectionAttributes.Add(new System.Xml.Linq.XAttribute("FileNumbers", maxFiles));
            ResetAttributes();
            files = this.FindValues("FileName");
        }
        private List<string> files;
        public List<string> Files
        {
            get
            {
                if(files == null)
                {
                    files = new List<string>();
                }
                return files;
            }
            set
            {
                files = value;
            }
        }

        public bool AddTop(string filePath)
        {
            if (Files.Count > 0)
            {
                if(Files[0].Equals(filePath, StringComparison.CurrentCultureIgnoreCase))
                {
                    return false;
                }
            }
            Files.Remove(filePath);
            Files.Insert(0, filePath);
            if (Files.Count > maxFiles)
            {
                Files.RemoveAt(maxFiles);
            }
            ResetValues("FileName", Files);
            return true;
        }
    }
}