In this tutorial you will learn to generate the random passwords in ASP.Net
We'll take here two server controls one is TextBox and another one is Button. In the TextBox user may enter the desired length of the password for example if the user want to generate password of 8 characters then he should enter 8 in the Textbox and click the Button.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="VC.aspx.cs" Inherits="_VC" %> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Generate Random Password in ASP.Net</title> </head> <body> <form id="form1" runat="server"> <label for="txtPasswordLength">Enter required password length:</label> <asp:TextBox ID="txtPasswordLength" runat="server" Columns="2" MaxLength="2" Width="43px"></asp:TextBox> <asp:Button ID="btnGeneratePassword" runat="server" Text="Generate Password" OnClick="btnGeneratePassword_Click" /> <asp:Label ID="lblGeneratedPassword" runat="server" ForeColor="Green" Text=""></asp:Label> </form> </body> </html>
Button click event code
public partial class _VC: System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) lblGeneratedPassword.Text = "Please enter a password length (e.g. 8)"; } public static string CreateRandomPassword(int intPasswordLength) { string strPasswordCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789"; Random randomNum = new Random(); char[] chars = new char[intPasswordLength]; for (int i = 0; i < intPasswordLength; i++) { chars[i] = strPasswordCharacters[(int)((strPasswordCharacters.Length) * randomNum.NextDouble())]; } return new string(chars); } protected void btnGeneratePassword_Click(object sender, EventArgs e) { if (txtPasswordLength.Text != "") { string strPasswordLength = txtPasswordLength.Text.Trim(); lblGeneratedPassword.Text = "Your generated password is: " + CreateRandomPassword(int.Parse(strPasswordLength)); } } }
Partial Class _VB Inherits System.Web.UI.Page Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load If Not IsPostBack Then lblGeneratedPassword.Text = "Please enter a password length (e.g. 8)" End If End Sub Public Shared Function CreateRandomPassword(intPasswordLength As Integer) As String Dim strPasswordCharacters As String = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789" Dim randomNum As New Random() Dim chars As Char() = New Char(intPasswordLength - 1) {} For i As Integer = 0 To intPasswordLength - 1 chars(i) = strPasswordCharacters(CInt((strPasswordCharacters.Length) * randomNum.NextDouble())) Next Return New String(chars) End Function Protected Sub btnGeneratePassword_Click(sender As Object, e As System.EventArgs) Handles btnGeneratePassword.Click If txtPasswordLength.Text <> "" Then Dim strPasswordLength As String = txtPasswordLength.Text.Trim() lblGeneratedPassword.Text = "Your generated password is: " + CreateRandomPassword(Integer.Parse(strPasswordLength)) End If End Sub End Class