RandomNumber quations not taken in my code (taken quations from databse)

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SQL-server-2000

SQL-Server-2005

, +

Dear Experts,

C#

private int GetRandomNumber(int[] levelIds)
       {
           bool exists = false;
           int randomIndex = 0;
           do
           {
               Random rand = new Random();
               randomIndex = rand.Next(levelIds.Length);
               if (completedQuestionIds.Count > 0)
                   exists = completedQuestionIds.Contains(levelIds[randomIndex]);
           }
           while (exists == true);

           completedQuestionIds.Add(levelIds[randomIndex]);

           Session["CompletedQuestionIds"] = completedQuestionIds;

           return levelIds[randomIndex];
       }

Thanks in advance for your valuable reply

Posted 20-Nov-11 22:39pm

2011999

Updated 20-Nov-11 22:42pm

JF2015

v2

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Sunasara Imdadhusen · Answer 1 · 2011-11-20T23:54:00

Hi Subbu,

I have created sample code for you, please modify your code according this.

This code is very SIMPLE and FAST to pickup random question from list of questions.

C#

ArrayList availableQuestions = new ArrayList();
ArrayList completedQuestions = new ArrayList();
public Form1()
{
    InitializeComponent();

    for (int i = 1; i <= 10; i++)
    {
        availableQuestions.Add(i);
    }
}
private void button1_Click(object sender, EventArgs e)
{
    GetRandomNumber();
}
private void GetRandomNumber()
{
    if (availableQuestions.Count >= 1)
    {
        Random rand = new Random();
        int QuestionID = Convert.ToInt16(availableQuestions[rand.Next(0, availableQuestions.Count - 1)]);
        completedQuestions.Add(QuestionID);
        availableQuestions.Remove(QuestionID);
    }
}

Please do let me know, if you have any doubt for the same.

Thanks,
Imdadhusen