Replace Last Instance Of - CSharp System

CSharp examples for System:String Replace

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Description

Replace Last Instance Of

Demo Code

/*/*from w  w  w .jav a2  s  .c o m*/
 * @version   : 2.5.0
 * @author    : Ext.NET, Inc. http://www.ext.net/
 * @date      : 2014-10-20
 * @copyright : Copyright (c) 2008-2014, Ext.NET, Inc. (http://www.ext.net/). All rights reserved.
 * @license   : See license.txt and http://www.ext.net/license/. 
 * @website   : http://www.ext.net/
 */
using System.Web.UI;
using System.Web;
using System.Text.RegularExpressions;
using System.Text;
using System.Security.Cryptography;
using System.Globalization;
using System.ComponentModel;
using System.Collections.Generic;
using System.Collections;
using System;

public class Main{
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="oldValue"></param>
        /// <param name="newValue"></param>
        /// <returns></returns>
        public static string ReplaceLastInstanceOf(this string text, string oldValue, string newValue)
        {
            if (text.IsEmpty())
            {
                return text;
            }

            return string.Format("{0}{1}{2}", text.LeftOfRightmostOf(oldValue), newValue, text.RightOfRightmostOf(oldValue));
        }
        /// <summary>
        /// Determine is the string is null or empty.
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public static bool IsEmpty(this string text)
        {
            return string.IsNullOrEmpty(text);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string RightOfRightmostOf(this string text, string value)
        {
            if (text.IsEmpty())
            {
                return text;
            }

            int i = text.LastIndexOf(value);
            
            if (i == -1)
            {
                return text;
            }
            
            return text.Substring(i + value.Length);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="c"></param>
        /// <returns></returns>
        public static string RightOfRightmostOf(this string text, char c)
        {
            if (text.IsEmpty())
            {
                return text;
            }

            int i = text.LastIndexOf(c);
            
            if (i == -1)
            {
                return text;
            }
            
            return text.Substring(i + 1);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string LeftOfRightmostOf(this string text, string value)
        {
            if (text.IsEmpty())
            {
                return text;
            }

            int i = text.LastIndexOf(value);
            
            if (i == -1)
            {
                return text;
            }
            
            return text.Substring(0, i);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="text"></param>
        /// <param name="c"></param>
        /// <returns></returns>
        public static string LeftOfRightmostOf(this string text, char c)
        {
            if (text.IsEmpty())
            {
                return text;
            }

            int i = text.LastIndexOf(c);
            
            if (i == -1)
            {
                return text;
            }
            
            return text.Substring(0, i);
        }
}

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