How to roll a list of numbers (list of numbers are in a notepad ) randomly in a lable

Question

User1933868974 posted

Hi,

I want to retrieve data from notepad and display it randomly on lable. The project is about lucky draw system where i need to make the employee id display randomly. Can someone help me out with the problem. Below are my code. Thanks

protected void Button1_Click(object sender, EventArgs e)
{
try
{
// Create an instance of StreamReader to read from a file.
// The using statement also closes the StreamReader.
using (StreamReader sr = new StreamReader("C:/ Users / Nor Asyraf Mohd No / Documents / TestFile.txt"))
{
string line;
// Read and display lines from the file until the end of
// the file is reached.
while ((line = sr.ReadLine()) != null)
{
string strRead = sr.ReadLine();
Random random = new Random();
Label1.Text = strRead.ToString();

}
}
}
catch (Exception i)
{
// Let the user know what went wrong.
Console.WriteLine("The file could not be read:");
Console.WriteLine(i.Message);
}
}
}

Answer 1

User-1838255255 posted

Hi Ash93,

According to your description, i think this issue is belong to winform project, here is asp.net forum, please check the following code: 

Sample Code: 

private void button1_Click(object sender, EventArgs e)
        {
            string fileName = @"D:\McTextFile.txt";

            int count = TotalLines(fileName);
            int[] necount = new int[count];
            int i = 0;
            using (StreamReader r = new StreamReader(fileName))
            {
                String input;
                while ((input = r.ReadLine()) != null)
                {
                    necount[i] = Convert.ToInt32(input);
                    i++;
                }
            }

            Random random = new Random();
            int start2 = random.Next(0, necount.Length);
            textBox1.Text = necount[start2].ToString();
        }

        public int TotalLines(string filePath)
        {
            using (StreamReader r = new StreamReader(filePath))
            {
                int i = 0;
                while (r.ReadLine() != null) { i++; }
                return i;
            }
        }

txt file:
12
20 
48 
25 
90 
89

Best Regards,

Eric Du