Random Number

Question

I need to generated Random String including numbers,char,alphanumneric etc... thanks i advance

Vulpes · Answer

It sounds like request validation is flagging that as a possible script attack because the random string looks like it could include unencoded HTML. To prevent that I'd stick to alphanumeric characters or at the very least don't use : static string GetRandomString(int length) { char[] chars = new char[length]; for (int i = 0; i { int j; do { j = rand.Next(32, 127); } while(j == 60 || j == 62); // don't use chars[i] = (char)j; return new string(chars); } }

Mahesh Chand · Answer

Mittal, No need to make text colored and size 50. I am sure Vulpes has answered you. Also, see lot of articles in the right side of this. Thanks! Keep the forums tidy!

Bharat Bhushan · Answer

see this link http://howtouseasp.net/alpha-numeric-digits-numbers-for-password-asp-net/

Mittal Sejpal · Answer

A potentially dangerous Request.Form value was detected from the client (TextBox2="HBf @gWjU#)z}m3"). after 3 or 4 times it give like this error

Prabhu Raja · Answer

Hi Mittal, follow this Source Code link to generate random number. http://www.obviex.com/Samples/Password.aspx

Vulpes · Answer

If 'cryptographic strength' randomness is not needed, here's a simpler approach using the Random class. The random string may contain any character in the ASCII range from 32 (space) to 126 (tilde) inclusive: using System; class Program { static Random rand = new Random(); static void Main() { string s = GetRandomString(10); Console.WriteLine(s); Console.ReadKey(); } static string GetRandomString(int length) { char[] chars = new char[length]; for (int i = 0; i return new string(chars); } }

Satyapriya Nayak · Answer

Hi Mittal, using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Security.Cryptography; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private string RandomString(int StrLength) { string CharsList = "abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ?> char[] chars = CharsList.ToCharArray(); RNGCryptoServiceProvider cryptoGen = new RNGCryptoServiceProvider(); byte[] ByteData = new byte[StrLength]; cryptoGen.GetBytes(ByteData); StringBuilder ResultStr = new StringBuilder(); foreach (byte byt in ByteData) { ResultStr.Append(chars[byt % chars.Length]); } return ResultStr.ToString(); } private void button1_Click(object sender, EventArgs e) { label1.Text = RandomString(8); } } } Thanks If this post helps you mark it as answer

Random Number

Answers (7)