.net工具類——型別判斷

1. IsDateTime
2. IsNumeric
3. IsInt
4. IsDouble
5. IsDecimal
6. IsValidEmail
7. IsValidDoEmail
8. IsURL

        #region 型別判斷

        /// <summary>
        /// 判斷物件是否為DateTime型別的日期
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
 

        public static bool IsDateTime(string expression)
        {
            DateTime dt;
            if (DateTime.TryParse(expression, out dt))
            {
                return true;
            }

            return false;
        }

        /// <summary>
        /// 判斷物件是否為Int32型別的數字
        
 
/// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsNumeric(object expression)
        {
            if (expression != null)
                return IsInt(expression.ToString());

            return false;
        }

        
 
/// <summary>
        /// 判斷物件是否為Int32型別的數字
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsInt(string expression)
        {
            if (expression != null)
            {
                int val;
                if (int.TryParse(expression, out val))
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 是否為double型別
        /// </summary>
        /// <param name="expression"></param>
        /// <returns></returns>
        public static bool IsDouble(string expression)
        {
            if (expression != null)
            {
                double val;
                if (double.TryParse(expression, out val))
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 是否為decimal型別
        /// </summary>
        /// <param name="expression"></param>
        /// <returns></returns>
        public static bool IsDecimal(string expression)
        {
            if (expression != null)
            {
                decimal val;
                if (decimal.TryParse(expression, out val))
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 檢測是否符合email格式
        /// </summary>
        /// <param name="strEmail">要判斷的email字串</param>
        /// <returns>判斷結果</returns>
        public static bool IsValidEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^[\w\.]+([-]\w+)*@[A-Za-z0-9-_]+[\.][A-Za-z0-9-_]");
        }

        public static bool IsValidDoEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
        }

        /// <summary>
        /// 檢測是否是正確的Url
        /// </summary>
        /// <param name="strUrl">要驗證的Url</param>
        /// <returns>判斷結果</returns>
        public static bool IsURL(string strUrl)
        {
            return Regex.IsMatch(strUrl, @"^(http|https)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{1,10}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
        }

        #endregion 型別判斷