C#隨機字符串插入函數

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
 
namespace RandomInsertKeywords
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            ArrayList aLst = new ArrayList();
 
            for (int k = 0; k < 6; k++)
            {
                aLst.Add(k.ToString()+”iseopad.com”);
            }
            string msg = randInsertKeywords(textBox1.Text.ToString(), aLst);
            MessageBox.Show(msg);
        }
 
        public string randInsertKeywords(string article, ArrayList keywordsArray)
        {
            ArrayList insertPlace = new ArrayList();
            Random rd = new Random();
 
            for (int i = 0; i < keywordsArray.Count; i++)
            {
                int insertPl = rd.Next(10,article.Length);
                if (!insertPlace.Contains(insertPl) && !insertPlace.Contains(insertPl + 1) || insertPlace.Contains(insertPl – 1))
                {
                    insertPlace.Add(insertPl);
                }
            }
 
            for (int j = 0; j < keywordsArray.Count; j++)
            {
 
                int m = 0;
                while (true)
                {
 
                    int replace = (int)insertPlace[j] + m;
                    if (replace < article.Length)
                    {
                        string cut = article.Substring(replace, 1);
                        if (cut == ” “)
                        {
                           article =  article.Insert(replace, ” “+(string)keywordsArray[j]);
                            break;
                        }
                    }
                    m++;
                }
            }
            return article;
        }
    }
}
原文：http://cn.iseopad.com/random-insert-string-functio-20120326/