How to add comma in random generated numbers C# winforms [duplicate]

Question

Currently I have this code:

private void button1_Click(object sender, EventArgs e)
{
    label1.Text = (new Random().NextDouble() * (new Random()).Next(10000)).ToString("0.00");
    //if (this.label1.Text.Length >= 7)
    //{
    //    this.label1.Text = string.Format("{0:0,0}", label1.Text);
    //}
}

which generated random number from 1-10000. I want to insert comma like this: 9,677.89.

Reza Aghaei · Accepted Answer · 2015-09-03 04:48:46Z

2

String.Format("{0:N2}", new Random().NextDouble()*10000)

edited Sep 3, 2015 at 4:48

answered Sep 3, 2015 at 4:23

Reza Aghaei

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3 Comments

Alexei Levenkov Over a year ago

Whenever using this code please make sure to specify culture to get required result (unless you live in US).

Martheen Over a year ago

Is the multiplication with larger integer and later division by double necessary? NextDouble already return double and "If one of the operands in a mathematical operation is a numeric type other than a Double, it is converted to a Double before performing the operation. The result of the operation is also a Double value. " msdn.microsoft.com/en-us/library/…

Alexei Levenkov Over a year ago

Duplicate lists several variants that one can use - stackoverflow.com/a/15668208/477420 if you need the same separators all the time - use invariant, if need particular one - specify explicitly, or use current as your code shows .

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