快速开发平台提供一组实体操作方法--验证类

快速开发平台附上源码：包含软件类实体操作方法--判空、长度、随机数、判数字、判数组相同等。 

 /// <summary>
        /// Generate random digit code
        /// </summary>
        /// <param name="length">Length</param>
        /// <returns>Result string</returns>
        public static string GenerateRandomDigitCode(int length)
        {
            var random = new Random();
            string str = string.Empty;
            for (int i = 0; i < length; i++)
                str = String.Concat(str, random.Next(10).ToString());
            return str;
        }

        /// <summary>
        /// Returns an random interger number within a specified rage
        /// </summary>
        /// <param name="min">Minimum number</param>
        /// <param name="max">Maximum number</param>
        /// <returns>Result</returns>
        public static int GenerateRandomInteger(int min = 0, int max = int.MaxValue)
        {
            var randomNumberBuffer = new byte[10];
            new RNGCryptoServiceProvider().GetBytes(randomNumberBuffer);
            return new Random(BitConverter.ToInt32(randomNumberBuffer, 0)).Next(min, max);
        }

        /// <summary>
        /// Ensure that a string doesn't exceed maximum allowed length
        /// </summary>
        /// <param name="str">Input string</param>
        /// <param name="maxLength">Maximum length</param>
        /// <param name="postfix">A string to add to the end if the original string was shorten</param>
        /// <returns>Input string if its lengh is OK; otherwise, truncated input string</returns>
        public static string EnsureMaximumLength(string str, int maxLength, string postfix = null)
        {
            if (String.IsNullOrEmpty(str))
                return str;

            if (str.Length > maxLength)
            {
                var result = str.Substring(0, maxLength);
                if (!String.IsNullOrEmpty(postfix))
                {
                    result += postfix;
                }
                return result;
            }
            else
            {
                return str;
            }
        }

        /// <summary>
        /// Ensures that a string only contains numeric values
        /// </summary>
        /// <param name="str">Input string</param>
        /// <returns>Input string with only numeric values, empty string if input is null/empty</returns>
        public static string EnsureNumericOnly(string str)
        {
            if (String.IsNullOrEmpty(str))
                return string.Empty;

            var result = new StringBuilder();
            foreach (char c in str)
            {
                if (Char.IsDigit(c))
                    result.Append(c);
            }
            return result.ToString();
        }

        /// <summary>
        /// Ensure that a string is not null
        /// </summary>
        /// <param name="str">Input string</param>
        /// <returns>Result</returns>
        public static string EnsureNotNull(string str)
        {
            if (str == null)
                return string.Empty;

            return str;
        }

        /// <summary>
        /// Indicates whether the specified strings are null or empty strings
        /// </summary>
        /// <param name="stringsToValidate">Array of strings to validate</param>
        /// <returns>Boolean</returns>
        public static bool AreNullOrEmpty(params string[] stringsToValidate)
        {
            bool result = false;
            Array.ForEach(stringsToValidate, str =>
            {
                if (string.IsNullOrEmpty(str)) result = true;
            });
            return result;
        }

        /// <summary>
        /// Compare two arrasy
        /// </summary>
        /// <typeparam name="T">Type</typeparam>
        /// <param name="a1">Array 1</param>
        /// <param name="a2">Array 2</param>
        /// <returns>Result</returns>
        public static bool ArraysEqual<T>(T[] a1, T[] a2)
        {
            //also see Enumerable.SequenceEqual(a1, a2);
            if (ReferenceEquals(a1, a2))
                return true;

            if (a1 == null || a2 == null)
                return false;

            if (a1.Length != a2.Length)
                return false;

            var comparer = EqualityComparer<T>.Default;
            for (int i = 0; i < a1.Length; i++)
            {
                if (!comparer.Equals(a1[i], a2[i])) return false;
            }
            return true;
        }