how to generate otp in windows form application in c sharp

Question

Since I am Begineer I need to know how to generate otp in windows form application in c sharp

Nikhil Sharma · Answer

protected void GenerateOTP( object sender EventArgs e) { string alphabets = ABCDEFGHIJKLMNOPQRSTUVWXYZ ; string small_alphabets = abcdefghijklmnopqrstuvwxyz ; string numbers = 1234567890 ; string characters = numbers; if (rbType.SelectedItem.Value == 1 ) { characters += alphabets + small_alphabets + numbers; } int length = int .Parse(ddlLength.SelectedItem.Value); string otp = string .Empty; for ( int i = 0; i { string character = string .Empty; do { int index = new Random().Next(0 characters.Length); character = characters.ToCharArray()[index].ToString(); } while (otp.IndexOf(character) != -1); otp += character; } lblOTP.Text = otp; }

Mukil Vendhan · Answer

kindly follow the link:https://thenuclearengineer.wordpress.com/2013/06/29/a-one-time-password-login-system-for-your-c-application/