ListView列表导出与导入 无错代码

#region ListView列表导出与导入
        /// <summary>
        /// ListView列表保存
        /// </summary>
        /// <param name="listViewname">ListView名称</param>
        /// <param name="path">文件名称</param>
        public static void ListView_save(ListView listViewname, string path)
        {
            if (listViewname.Items.Count != 0)
            {
                List<string> list = new List<string>();
                foreach (ListViewItem item in listViewname.Items)
                {
                    string temp2 = "";
                    for (int i = 0; i < item.SubItems.Count; i++)
                    {
                        if (i == 0)
                        {
                            temp2 = item.SubItems[i].Text;
                        }
                        else
                        {
                            temp2 = temp2 + "|" + item.SubItems[i].Text;
                        }
                    }
                    string temp = temp2;
                    list.Add(temp);
                }
                Thread thexp = new Thread(() => export(list, path)) { IsBackground = true };
                thexp.Start();
            }
        }
        public static void export(List<string> list, string path)
        {
            string path2 = path;
            if (path.Substring(0, 1) == @"\")
            {
                path2 = AppDomain.CurrentDomain.BaseDirectory + path; ;
            }
            StringBuilder sb = new StringBuilder();
            foreach (string tel in list)
            {
                sb.AppendLine(tel);
            }
            System.IO.File.WriteAllText(path2, sb.ToString(), Encoding.UTF8);
        }
        /// <summary>
        /// ListView列表读入
        /// </summary>
        /// <param name="listViewname">ListView名称</param>
        /// <param name="path">文件名称</param>
        public static void ListView_read(ListView listViewname, string path)
        {
            string path2 = path;
            if (path.Substring(0, 1) == @"\")
            {
                path2 = AppDomain.CurrentDomain.BaseDirectory + path; ;
            }
            //判断文件的存在
            if (File.Exists(path2))
            {
                //存在文件
                foreach (var item in File.ReadAllLines(path2))
                {
                    string[] str = item.Split('|');
                    if (str.Length > 0)
                    {
                        ListViewItem lvi = new ListViewItem();
                        for (int i = 0; i < str.Length; i++)
                        {
                            if (i == 0)
                            {
                                lvi.Text = str[i];
                            }
                            else
                            {
                                lvi.SubItems.Add(str[i]);
                            }
                        }
                        listViewname.Items.Add(lvi);
                    }
                    //MessageBox.Show(item);
                }
            }
        }
        #endregion