For authentication in html source code
Code for login
If FormsAuthentication.Authenticate(txtUser.Text, txtPassword.Text) Then
FormsAuthentication.RedirectFromLoginPage(txtUser.Text, chkPersistLogin.Checked)
Else
ErrorMessage.InnerHtml = "<b>Something went wrong...</b> please re-enter your credentials..."
End If
End Sub
Code to be displayed after you loged in
<%@Page Language="VB" %>
<script language="vb" runat="server">
Sub SignOut(objSender As Object, objArgs As EventArgs)
'delete the users auth cookie and sign out
FormsAuthentication.SignOut()
'redirect the user to their referring page
Response.Redirect(Request.UrlReferrer.ToString())
End Sub
Sub Page_Load()
'verify authentication
If User.Identity.IsAuthenticated Then
'display Credential information
displayCredentials.InnerHtml = "Current User : <b>" & User.Identity.Name & "</b>" & _
"<br><br>Authentication Used : <b>" & User.Identity.AuthenticationType & "</b>"
Else
'Display Error Message
displayCredentials.InnerHtml = "Sorry, You have not been authenticated."
End If
End Sub
Code to be typed in web.config file
<configuration>
<customErrors mode="Off"/>
<authentication mode="Forms">
<forms name="AuthCookie"
path="/"
loginUrl="login.aspx"
protection="All"
timeout="30">
<credentials passwordFormat="Clear">
<user name="jeff" password="test" />
<user name="mike" password="test" />
</credentials>
</forms>
</authentication>
<authorization>
<deny users="?" />
</authorization>
</system.web>
</configuration>
To shutdown the System using C Sharp Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
// Remember to add a reference to the System.Management assembly
using System.Management;
namespace ShutDown
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnShutDown_Click(object sender, EventArgs e)
{
ManagementBaseObject mboShutdown = null;
ManagementClass mcWin32 = new ManagementClass("Win32_OperatingSystem");
mcWin32.Get();
// You can't shutdown without security privileges
mcWin32.Scope.Options.EnablePrivileges = true;
ManagementBaseObject mboShutdownParams = mcWin32.GetMethodParameters("Win32Shutdown");
// Flag 1 means we want to shut down the system
mboShutdownParams["Flags"] = "1";
mboShutdownParams["Reserved"] = "0";
foreach (ManagementObject manObj in mcWin32.GetInstances())
{
mboShutdown = manObj.InvokeMethod("Win32Shutdown", mboShutdownParams, null);
}
}
To know the IP address of your System
Add the header file before code
using System.Net;
{
String strHostName = Dns.GetHostName();
IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
IPAddress[] addr = ipEntry.AddressList;
}
Age Calculation using VB Code
Imports System.Data
Imports System.Data.OleDb
Imports System.Math
Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
Dim iDagdag As Integer
iDagdag = CInt(DateDiff(DateInterval.Year, DateTimePicker1.Value, Now) / 4)
TextBox8.Text = Floor((DateDiff(DateInterval.Day, DateTimePicker1.Value, Now) - iDagdag) / 365)
End Sub
To Search file
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.IO;
namespace searchTxtFile
{
class searchTxt
{
static void Main()
{
string fName = @" ";//path to text file
StreamReader testTxt = new StreamReader(fName);
string allRead = testTxt.ReadToEnd();//Reads the whole text file to the end
testTxt.Close(); //Closes the text file after it is fully read.
string regMatch = " ";//string to search for inside of text file. It is case sensitive.
if (Regex.IsMatch(allRead,regMatch))//If the match is found in allRead
{
Console.WriteLine("found\n");
}
else
{
Console.WriteLine("not found\n");
}
}
}
}
Session Code
write the following code on button click
Session["name"] = TextBox1.Text;
Session["class"] = TextBox2.Text;
Response.Redirect("next.aspx");
write this code on another form where you want to display session object
protected void Page_Load(object sender, EventArgs e)
{
Label1.Text = Session["name"].ToString();
Label2.Text = Session["class"].ToString();
}
