filling an array with random #s

[gaylo565]

I am trying to fill an array with random #s from 1-42 with out any repetition...is there a shuffle sort of function that I am unaware of? Not sure whats wrong with my code but I am getting some #'s more than once when I print the array to a text file. Some help would be nice

private void frmMain_Load(object sender, System.EventArgs e)
		{
			//seed the random number function
			DateTime dtmCurrent = DateTime.Now;
			generateRandom = new Random(dtmCurrent.Millisecond);

			//fill array with random #'s from 1 to 7
			int intAdd = 0;
			while(intAdd < 42)
			{
				intStore = generateRandom.Next(1,42);
				//check to see if array contains generated #
				foreach(int intBoard1 in intBoard)
				{
					if(intStore == intBoard1)
					{
						bln_isSame = true;
					}
					else
					{
						bln_isSame = false;
					}
				}
				//if array doesn't contain generated number then add                                           it to the array in next position
				if(bln_isSame == false)
				{
					intBoard[intAdd] = intStore;
					intAdd++;
				}
			}
			int intIndex=0;
			//write array to a file for test
			StreamWriter arrayStreamWriter = new StreamWriter("C:\\Documents and Settings\\Owner.Gir\\My Documents\\Visual Studio Projects\\Memory\\array.txt",true);
			while(intIndex < 42)
			{
				arrayStreamWriter.WriteLine(intBoard[intIndex]);
				intIndex++;
			}
			arrayStreamWriter.Close();
		}

there must be a simple way of doing this.
there are a few variables declared at the class level wich isnt shown but thats not where my problem is...It compiles ok but not what I need.

[excavator]

private int[] PopulateRandomNumbers(int arraylength, int minvalue, int maxvalue)
        {
            DateTime c = DateTime.Now;
            Random r = new Random(c.Millisecond);
            int[] RandomNumbers = new int[arraylength];
            int RandomNumber;

            for (int i = 0; i < arraylength; i++)
            {
                RandomNumber = r.Next(minvalue, maxvalue);
                while (isExistIn(RandomNumber, RandomNumbers) == true)
                {
                    RandomNumber = r.Next(minvalue, maxvalue);
                }
                RandomNumbers[i] = RandomNumber;                
            }
            return RandomNumbers;
        }

        private Boolean isExistIn(int number, int[] Numbers)
        {
            Boolean result = false;
            for (int i = 0; i < Numbers.Length; i++)
            {
                if (Numbers[i] == number)
                {
                    result = true;                    
                }
            }
            return result;
        }

to use the code

int[] RN = PopulateRandomNumbers(40, 1, 42);

there may be simpler steps but i hope this can help u a bit.

[Xav]

It's not completely necessary to instantiate so many objects, but this makes it clearer to read/understand. Good help, though. +rep given.

Welcome to CodeCall anyhow, excavator!

[gaylo565]

thank u...i finally got mine workin but yours is much more concise. I might still switch what ive got out for what u have

[excavator]

@Xav
I agree, and thanks.

@gaylo565
glad i can be of support

[Xav]

You're welcome. Not many people use the reputation system, so we try to encourage it as much as possible!