C# Shuffle string in list & display the output to a textbox

private void Shufflebutton_Click(object sender, EventArgs e)

{

List<int> myList = new List<int>();

int[] order;

Random random = new Random();

StringBuilder sb = new StringBuilder();

foreach (String suit in new string[] { "a", "b" })

{

foreach (string value in new String[] { "2", "3", "4", "5" } )

{

sb.Append(suit);

sb.Append(value);

sb.Append(" ");

}

sb.Append(Environment.NewLine);

}

myList = sb.ToList(); // error at this line

order = new int[myList.Count];

for (int i = 0; i

{

order[i] = i;

}

for (int i = 0; i < order.Length - 1; i++)

{

int rnd = random.Next(i + 1, order.Length);

int temp = order[i];

order[i] = order[rnd];

order[rnd] = temp;
}

ShuffletextBox.Text = order[rnd].ToString(); //iam getting error at this line

}

I am trying to save the string in the List and then wants to shuffle the list and display the output in a textbox. Can some one help me?? Recently started learning c#. Any help greatly appreciated.

1 Reply

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Vulpes12y ago
Accepted answer
Try this instead:

private void ShuffleButton_Click(object sender, EventArgs e)
{
List myList = new List();
string[] order;
Random random = new Random();
foreach (String suit in new string[] { "a", "b" })
{
foreach (string value in new String[] { "2", "3", "4", "5" })
{
myList.Add(suit + value);
}
}

order = myList.ToArray();

// Fischer-Yates shuffle
for (int i = order.Length; i > 0; i--)
{
int rnd = random.Next(i);
string temp = order[rnd];
order[rnd] = order[i - 1];
order[i - 1] = temp;
}

ShuffletextBox.Text = String.Join(" ", order);
}

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