C#

Student student = context.Students.Find(1);
 student.StudentName = "Anele";
  var success = context.Entry(student).State == EntityState.Modified ? context.SaveChanges() : 0;

Entry

I have made a context menu switch and a treeview! The context menu role is to delete the node on right click (from the delete button in menu of course) but the problem is that selectednode.text is always null! I want to get the text of the selected node and search in database to delete it from database! Here is the code
Treeview

<asp:TreeView runat="Server" ExpandImageUrl="~/images/database.png" CollapseImageUrl="~/images/database.png" OnTreeNodePopulate="Node_Populate" ID="tvwauthors"  >

 <Nodes>

  <asp:TreeNode Text="Existing Database" PopulateOnDemand="true" Value="0" />

 </asp:TreeView>

  </div>

Context menu

  <script type="text/javascript">
   var $b = jQuery.noConflict(true);
    $b(document).ready(function () {
        $b('#tvwauthors').vscontext({ menuBlock: 'vs-context-menu' });
    });
</script>


   <ul>
   <li class="delete">
   <span onclick="return confirm('Are you sure to delete?')">          
   <asp:Button Text="Delete" runat="server"  CausesValidation="false"     
   OnClick="delete"  style="width:70px;height:32px" /></span>
   </li>

event in aspx.cs file

  protected void delete(object sender, EventArgs e)
{
    string nodeVal = tvwauthors.SelectedNode.Text;
 }

(RasEntry entry = RasEntry.CreateBroadbandEntry("osama",RasDevice.GetDeviceByName("(PPPoE Osama)",RasDeviceType.PPPoE)); )

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 DotRas;

namespace WindowsFormsApplication2
{
   

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


   
        private void button1_Click(object sender, EventArgs e)
        {
            string path;
            path = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.User);

            using (RasPhoneBook pbk = new RasPhoneBook())
            {
                pbk.Open(path);
                
                RasEntry entry = RasEntry.CreateBroadbandEntry("osama",RasDevice.GetDeviceByName("(PPPoE Osama)",RasDeviceType.PPPoE));
                // Configure any options for your entry here via entry.Options
                pbk.Entries.Add(entry);
            }


            using (RasDialer dialer = new RasDialer()) 
            {
                dialer.EntryName = "Your Entry";
                dialer.PhoneBookPath = path;
                dialer.Credentials = new System.Net.NetworkCredential("User", "Password");
                dialer.Dial();
            }
        }
    }
}