how conver number into words

public string retWord(int number)
    {

        if (number == 0) return "Zero";
        if (number == -2147483648) return "inus Two Hundred and Fourteen Crore Seventy Four Lakh Eighty Three Thousand Six Hundred and Forty Eight";
        int[] num = new int[4];
        int first = 0;
        int u, h, t;
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        if (number < 0)
        {
            sb.Append("Minus");
            number = -number;
        }
        string[] words0 = { "", "One ", "Two ", "Three", "Four ", "Five", "Six ", "Seven", "Eight ", "Nine " };
        string[] words = { "Ten", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ", "Fifteen ", "Sixteen ", "Seventeen ", "Eighteen ", "Nineteen " };
        string[] words2 = { "Twenty ", "Thirty", "Forty", "Fifty ", "Sixty ", "Seventy", "Eighty", "Ninety" };
        string[] words3 = { "Thousand ", "Lakh", "Crore" };
        num[0] = number % 1000; // units
        num[1] = number / 1000;
        num[2] = number / 100000;
        num[1] = num[1] - 100 * num[2]; // thousands
        num[3] = number / 10000000; // crores
        num[2] = num[2] - 100 * num[3]; // lakhs
        for (int i = 3; i > 0; i--)
        {
            if (num[i] != 0)
            { first = i; break; }
        }

        for (int i = first; i >= 0; i--)
        {
            if (num[i] == 0) continue;
            u = num[i] % 10; // ones
            t = num[i] / 10;
            h = num[i] / 100; // hundreds
            t = t - 10 * h; // tens
            if (h > 0) sb.Append(words0[h] + "Hundred ");
            if (u > 0 || t > 0)
            {
                if (h > 0 || i == 0) sb.Append("and ");
                if (t == 0)
                    sb.Append(words0[u]);
                else if (t == 1)
                    sb.Append(words[u]);
                else
                    sb.Append(words2[t - 2] + words0[u]);
            }
            if (i != 0) sb.Append(words3[i - 1]);
        }
        return sb.ToString().TrimEnd();

    }

how genrate 8 disit rendom number

    public string Get8Digits()
    {
        var bytes = new byte[4];
        var rng = RandomNumberGenerator.Create();
        rng.GetBytes(bytes);
        uint random = BitConverter.ToUInt32(bytes, 0) % 100000000;
        return String.Format("{0:D8}", random);
    }

DELETE TRIGGER

CREATE TRIGGER [dbo].[Student_Update]
ON [dbo].StudMarks
AFTER DELETE
AS
BEGIN
INSERT INTO StudMarks2 SELECT Regdno,MathsMarks,StatsMarks,CompScienceMarks,TotMarks,AvgMarks FROM DELETED
END
 

java script funcation for open panel

<script type="text/javascript">
        function ff() {
            document.getElementById("a").style.display = "block";
        }
        function ff2() {
            document.getElementById("a").style.display = "none";
        }
    </script>

 <div class="GridviewDiv" id="a" style="display: none">
contanet div that will be open
</div>

call
    <asp:DropDownList ID="DropDownList1" runat="server" onmouseover="javascript:ff()" >
    </asp:DropDownList>

auto referesh grid and update panel

.aspx;
<asp:ScriptManager ID="ScriptManager1" runat="server" />
                    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                        <ContentTemplate>
                            <asp:Timer ID="AutoRefreshTimer" runat="server" Interval="5000" OnTick="AutoRefreshTimer_Tick" />
                            <asp:GridView ID="gvrecords" runat="server" AutoGenerateColumns="False" AllowSorting="true"
                                Width="540px" CssClass="Gridview">
                                <Columns>
                                    <asp:TemplateField HeaderText="UserName">
                                        <ItemTemplate>
                                            <asp:Label ID="lblFirstname" Text='<%# Eval("name") %>' runat="server" />
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                </Columns>
                            </asp:GridView>
                        </ContentTemplate>
                    </asp:UpdatePanel>


.cs

  protected void AutoRefreshTimer_Tick(object sender, EventArgs e)
    {
        BindUserDetails();(fill grid funcation)
      
    }

Fill Dataset Using Reader

SqlDataReader dr;
            SqlConnection connection = new SqlConnection(sqlConnectString);
            SqlCommand command = new SqlCommand(sqlSelect, connection);
            connection.Open( );
            dr = command.ExecuteReader( );

            // Create the DataSet using the DataSet.Load( ) method
            DataSet ds = new DataSet( );
            ds.Load(dr, LoadOption.OverwriteChanges,
                new string[ {"Department", "Contact"});

            int tableCount = 0;
            foreach(DataTable dt in ds.Tables)
            {
                Console.WriteLine("Table {0}; Name = {1}", tableCount++,
                    dt.TableName);
                foreach(DataRow row in dt.Rows)
                {
                    for(int i = 0; i < dt.Columns.Count; i++)
                        Console.Write("{0} = {1};", dt.ColumnsIdea.ColumnName,
                            rowIdea);
                    Console.WriteLine( );
                }
                Console.WriteLine( );
            }

            Console.WriteLine("Press any key to continue.");
            Console.ReadKey( );

Fill Datatable Using DataReader

private DataTable GetDataTable()
{
  string sql = "SELECT Id, Description FROM MyTable";
  using (SqlConnection myConnection = new SqlConnection(connectionString))
  {
    using (SqlCommand myCommand = new SqlCommand(sql, myConnection))
    {
      myConnection.Open();
      using (SqlDataReader myReader = myCommand.ExecuteReader())
      {
        DataTable myTable = new DataTable();
        myTable.Load(myReader);
        myConnection.Close();
        return myTable;
      }
    }
  }
}