Display Top N Random records in ASP.Net GridView

Hi smile,

Check this example. Now please take its reference and correct your code.

HTML

<asp:TextBox runat="server" ID="txtNumber" OnTextChanged="TextChanged" AutoPostBack="true" />
<br />
<asp:GridView runat="server" ID="gvEmployees" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="EmployeeId" HeaderText="Id" />
        <asp:BoundField DataField="FirstName" HeaderText="First Name" />
        <asp:BoundField DataField="LastName" HeaderText="Last Name" />
        <asp:BoundField DataField="Country" HeaderText="Country" />
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Data;
using System.Configuration;
using System.Data.SqlClient;

VB.Net

Imports System.Data.SqlClient
Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindGridView();
    }
}

private void BindGridView(int top = 3)
{
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = "SELECT TOP (@Top) EmployeeId,FirstName,LastName,Country FROM Employees ORDER BY NEWID()";
    using (SqlCommand cmd = new SqlCommand(query))
    {
        cmd.Parameters.AddWithValue("@Top", top);
        using (SqlConnection con = new SqlConnection(conString))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                DataTable dt = new DataTable();
                sda.Fill(dt);
                gvEmployees.DataSource = dt;
                gvEmployees.DataBind();
            }
        }
    }
}

protected void TextChanged(object sender, EventArgs e)
{
    BindGridView(Convert.ToInt32(txtNumber.Text.Trim()));
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not IsPostBack Then
        BindGridView()
    End If
End Sub

Private Sub BindGridView(Optional ByVal top As Integer = 3)
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Dim query As String = "SELECT TOP (@Top) EmployeeId,FirstName,LastName,Country FROM Employees ORDER BY NEWID()"
    Using cmd As SqlCommand = New SqlCommand(query)
        cmd.Parameters.AddWithValue("@Top", top)
        Using con As SqlConnection = New SqlConnection(conString)
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                cmd.Connection = con
                sda.SelectCommand = cmd
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                gvEmployees.DataSource = dt
                gvEmployees.DataBind()
            End Using
        End Using
    End Using
End Sub

Protected Sub TextChanged(ByVal sender As Object, ByVal e As EventArgs)
    BindGridView(Convert.ToInt32(txtNumber.Text.Trim()))
End Sub

Screenshot