字符串、文件大小格式、气泡信息提示、邮箱地址和电话号码合法性

/// <summary>        /// 判断字符串是否为整数         /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static bool IsNumeric(string str)        {            if (str.Trim() == "")            {                return false;            }            foreach (char ch in str)            {                if (ch < 48 || ch > 57)                    return false;            }            return true;        }        /// <summary>        /// 把文件大小转为可读的字符串         /// </summary>        /// <param name="size"></param>        /// <returns></returns>        public static string FileSizeToReadString(long size)        {            StringBuilder sb = new StringBuilder();            string strUnits = "Bytes";            float fSize = 0.0F;            if (size > 1024)            {                if (size < 1024 * 1024)                {                    strUnits = "KB";                    fSize = Convert.ToSingle(size) / 1024;                }                else                {                    strUnits = "MB";                    fSize = Convert.ToSingle(size) / 1048576;                }                sb.AppendFormat("{0:0.0} {1}", fSize, strUnits);            }            else            {                fSize = Convert.ToSingle(size);                sb.AppendFormat("{0:0} {1}", fSize, strUnits);            }            return sb.ToString();        }        /// <summary>        /// 文件大小格式         /// </summary>        /// <param name="size">文件字节数(bytes)</param>        /// <returns></returns>        private string FormatFileSize(long size)        {            int[] limits = new int[] { 1024 * 1024 * 1024, 1024 * 1024, 1024 };            string[] units = new string[] { "GB", "MB", "KB" };            for (int i = 0; i < limits.Length; i++)            {                if (size >= limits[i])                    return String.Format("{0:#,##0.##} " + units[i], ((double)size / limits[i]));            }            return String.Format("{0} bytes", size);        }        /// <summary>        /// 显示气泡提示信息         /// </summary>        /// <param name="text"></param>        /// <param name="win"></param>        public static void ShowMessage(string text, IWin32Window win)        {            ToolTip toolTipMsg = new ToolTip();            if (toolTipMsg == null)            {                toolTipMsg = new ToolTip();                toolTipMsg.IsBalloon = true;                toolTipMsg.ToolTipIcon = ToolTipIcon.Info;                toolTipMsg.ToolTipTitle = "提示";            }            toolTipMsg.Hide(win);            toolTipMsg.Show(text, win, 0, -60, 3000);        }        /// <summary>        /// 显示气泡提示信息         /// </summary>        /// <param name="text"></param>        /// <param name="win"></param>        public static void ShowMessage(string text, IWin32Window win, int x, int y)        {            ToolTip toolTipMsg = new ToolTip();            if (toolTipMsg == null)            {                toolTipMsg = new ToolTip();                toolTipMsg.IsBalloon = true;                toolTipMsg.ToolTipIcon = ToolTipIcon.Info;                toolTipMsg.ToolTipTitle = "提示";            }            toolTipMsg.Hide(win);            toolTipMsg.Show(text, win, x, y - 60, 1000);        }        public static void ShowMessage(string text, IWin32Window win, int x, int y, int time)        {            ToolTip toolTipMsg = new ToolTip();            if (toolTipMsg == null)            {                toolTipMsg = new ToolTip();                toolTipMsg.IsBalloon = true;                toolTipMsg.ToolTipIcon = ToolTipIcon.Info;                toolTipMsg.ToolTipTitle = "提示";            }            toolTipMsg.Hide(win);            toolTipMsg.Show(text, win, x, y - 60, time);        }        /// <summary>        /// 显示详细信息提示         /// </summary>        /// <param name="text"></param>        /// <param name="win"></param>        public static void ShowMessageEx(string text, Control cl)        {            ToolTip toolTipMsg = new ToolTip();            if (toolTipMsg == null)            {                toolTipMsg = new ToolTip();                toolTipMsg.IsBalloon = true;                toolTipMsg.SetToolTip(cl, text);            }        }        /// <summary>        /// 去掉重复项         /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static string DelRepeat(string str)        {            string[] values = str.Split(';');            List<string> list = new List<string>();            StringBuilder sb = new StringBuilder();            for (int i = 0; i < values.Length; i++)            {                if (values[i] != string.Empty && list.IndexOf(values[i]) == -1)                {                    list.Add(values[i]);                    sb.Append(values[i]);                    sb.Append(";");                }            }            return sb.ToString();        }        /// <summary>        /// 判断邮件地址是否合法         /// </summary>        /// <param name="inputEmail"></param>        /// <returns></returns>        public static bool isEmail(string inputEmail, out string errEmail)        {            string strRegex = @"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";            Regex re = new Regex(strRegex);            string[] emails = inputEmail.Split(';');            foreach (string email in emails)            {                if (!re.IsMatch(email))                {                    errEmail = email;                    return false;                }            }            errEmail = "";            return true;        }        /// <summary>        /// 判断邮件地址是否合法         /// </summary>        /// <param name="inputEmail"></param>        /// <returns></returns>        public static bool isEmail(string email)        {            string strRegex = @"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";            Regex re = new Regex(strRegex);            if (!re.IsMatch(email))            {                return false;            }            return true;        }        /// <summary>        /// 判断是否是电话号码         /// </summary>        /// <param name="phoneNumber"></param>        /// <param name="errorNumber"></param>        /// <returns></returns>        public static bool isPhoneNumber(string phoneNumber, out string errorNumber)        {            string strRegex1 = @"^1(([0-1][0-9])|(2[0-5])|(3[0-9])|(5[^4])|(8[5-9])|(80))\d{8}$";            string strRegex0 = @"^0\d{10,11}$";            Regex re1 = new Regex(strRegex1);            Regex re0 = new Regex(strRegex0);            string[] phones = phoneNumber.Split(';');            foreach (string phone in phones)            {                if (!(re0.IsMatch(phone) | re1.IsMatch(phone)))                {                    errorNumber = phone;                    return false;                }            }            errorNumber = "";            return true;        }        /// <summary>        /// 判断是否是电话号码        /// </summary>        /// <param name="phoneNumber"></param>        /// <returns></returns>        public static bool isPhoneNumber(string phoneNumber)        {            string strRegex1 = @"^1(([0-1][0-9])|(2[0-5])|(3[0-9])|(5[^4])|(8[5-9])|(80))\d{8}$";            string strRegex0 = @"^0\d{10,11}$";            Regex re1 = new Regex(strRegex1);            Regex re0 = new Regex(strRegex0);            if (!(re0.IsMatch(phoneNumber) | re1.IsMatch(phoneNumber)))            {                return false;            }            return true;        }