CODEWITHSUNDEEP
c#winforms
Sham
Sham

Reputation: 840

Displaying data randomly in Data Grid View in Windows Application using C#

I am working on a small assignment where I need to display data (0 to 99 - make sure all the numbers are displayed) randomly in a data grid view of 10 rows and 10 columns. I am unable to figure out the logic that needs to be written for this scenario. Currently I am doing like shown below, two for loops, one for row and other columns and iterating it...

        int[] arr = new int[] { 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 58, 69, 60, 61, 62, 63, 64 };
        char c = Convert.ToChar(arr.GetValue(new Random().Next(0, 21)));

        for (int row = 0; row < 10; row++)
        {
            for (int col = 0; col < 10; col++)
            {
                if ((row + col) == 9)
                {
                    this.dataGridView1.Rows[row].Cells[col].Value = string.Format("{0}     {1}", c, ((row + 1) * 9));
                }
                else
                {
                    this.dataGridView1.Rows[row].Cells[col].Value = string.Format("{0}     {1}", Convert.ToChar(arr.GetValue(new Random().Next(0, 21))), row * 10 + (col));
                    System.Threading.Thread.Sleep(15);
                }
            }
        }

Out put:

Data Grid View Output

Expected:

Code for randomly distributing the numbers from 0 to 99.

Thanks in Advance.

Upvotes: 1

Views: 2178

Answers (3)

Sham
Sham

Reputation: 840

This is what I was finally able to do it. It worked!!!

public static class ThreadSafeRandom
{
    [ThreadStatic]
    private static Random Local;

    public static Random ThisThreadsRandom
    {
        get { return Local ?? (Local = new Random(unchecked(Environment.TickCount * 31 + Thread.CurrentThread.ManagedThreadId))); }
    }
}

static class MyExtensions
{
    public static void Shuffle<T>(this IList<T> list)
    {
        int n = list.Count;
        while (n > 1)
        {
            n--;
            int k = ThreadSafeRandom.ThisThreadsRandom.Next(n + 1);
            T value = list[k];
            list[k] = list[n];
            list[n] = value;
        }
    }
}

The above code does the shuffling of numbers. 

        var numbers = new List<int>(Enumerable.Range(0, 100));
        numbers.Shuffle();
        List<int> final = numbers.GetRange(0, 100);                                   

        int[,] f = new int[10, 10];

        for (int i = 0; i < 10; i++)
        {
            for (int j = 0; j < 10; j++)
            {
                f[i, j] = final[(i * 10) + j];                    
            }
        }

        for (int i = 0; i < 10; i++)
        {
            for (int j = 0; j < 10; j++)
            {
                if (f[i, j] % 9 == 0)
                {
                    this.dataGridView1.Rows[i].Cells[j].Value = string.Format("{0}     {1}", charSymbol, f[i, j]);
                }
                else
                {
                    this.dataGridView1.Rows[i].Cells[j].Value = string.Format("{0}     {1}", GetRandomChar(), f[i, j]);                       
                }
            }
        }

Upvotes: 0

Chakri
Chakri

Reputation: 790

Check with this if you ain't done with your coding...

protected void Button1_Click(object sender, EventArgs e)
{        
    DataTable dt = new DataTable();
    for (int i = 0; i < 10; i++)
        dt.Columns.Add("col" + i.ToString(), typeof(int));

    Random r = new Random();
    List<int> l = new List<int>(100);
    int temp=0;
    for (int i = 9; i >= 0; i--)
    {
        DataRow dr = dt.NewRow();
        for (int j = 0; j < 10; j++)
        {
            temp = r.Next(99);
            if (!l.Contains(temp) || (j == 0 && i == 0))
            {
                dr["col" + j.ToString()] = temp;
                l.Add(temp);
            }
            else
                j -= 1;
        }
        dt.Rows.Add(dr);
    }
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

Upvotes: 0

dvlsg
dvlsg

Reputation: 5538

By small assignment do you mean school assignment? If so, I don't want to write everything for you, but to point you in the right direction:

The first step I would take initializing an array with a size of 100, and placing the numbers 0-99 on the array. Then, I would find a method for shuffling the array (Linq's OrderBy used with the Random class may be useful to you here). Then, I would iterate through the shuffled array, and place those items inside the grid. I think you have the general grid looping idea down, with the embedded for loops... I'm not sure what the point of the Thread Sleep is, though.

Upvotes: 2

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