Extensions/StringExtensions.cs

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


namespace ComLib.Extensions
{
    /// <summary>
    /// This static class contains several common String extension methods.
    /// </summary>
    public static class StringExtensions
    {
        #region Appending
        /// <summary>
        /// Multiply a string N number of times.
        /// </summary>
        /// <param name="str">String to multiply.</param>
        /// <param name="times">Number of times to multiply the string.</param>
        /// <returns>Original string multiplied N times.</returns>
        public static string Times(this string str, int times)
        {
            if (string.IsNullOrEmpty(str)) return string.Empty;
            if (times <= 1) return str;

            string strfinal = string.Empty;
            for (int ndx = 0; ndx < times; ndx++)
                strfinal += str;

            return strfinal;
        }


        /// <summary>
        /// Increases the string to the maximum length specified.
        /// If the string is already greater than maxlength, it is truncated if the flag truncate is true.
        /// </summary>
        /// <param name="str">The STR.</param>
        /// <param name="maxLength">Length of the max.</param>
        /// <param name="truncate">if set to <c>true</c> [truncate].</param>
        /// <returns>Increased string.</returns>
        public static string IncreaseTo(this string str, int maxLength, bool truncate)
        {
            if (string.IsNullOrEmpty(str)) return str;
            if (str.Length == maxLength) return str;
            if (str.Length > maxLength && truncate) return str.Truncate(maxLength);

            string original = str;

            while (str.Length < maxLength)
            {
                // Still less after appending by original string.
                if (str.Length + original.Length < maxLength)
                {
                    str += original;
                }
                else // Append partial.
                {
                    str += str.Substring(0, maxLength - str.Length);