Select top 5 record from DataTable in Windows Application using C# and VB.Net

Hi Mohal,

Please refer below sample.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

Namespaces

C#

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

VB.Net

Imports System.Data
Imports System.Data.SqlClient

Code

C#

private void Form1_Load(object sender, EventArgs e)
{
    BindGrid();
}

private void BindGrid()
{
    DataTable dt = new DataTable();
    string cs = @"Server=192.168.0.100\SQL2019;Database=Northwind;UID=sa;PWD=pass@123";
    using (SqlConnection con = new SqlConnection(cs))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT CustomerId,ContactName,Country FROM Customers", con))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
            {
                sda.Fill(dt);
            }
        }
    }

    DataTable dtResult = new DataTable();
    if (dt.Rows.Count > 0)
    {
        dtResult = dt.AsEnumerable().Take(5).CopyToDataTable();
    }
    gvCustomers.DataSource = dtResult;
}

VB.Net

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    BindGrid()
End Sub

Private Sub BindGrid()
    Dim dt As DataTable = New DataTable()
    Dim cs As String = "Server=192.168.0.100\SQL2019;Database=Northwind;UID=sa;PWD=pass@123"
    Using con As SqlConnection = New SqlConnection(cs)
        Using cmd As SqlCommand = New SqlCommand("SELECT CustomerId,ContactName,Country FROM Customers", con)
            Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
                sda.Fill(dt)
            End Using
        End Using
    End Using
    Dim dtResult As DataTable = New DataTable()
    If dt.Rows.Count > 0 Then
        dtResult = dt.AsEnumerable().Take(5).CopyToDataTable()
    End If
    gvCustomers.DataSource = dtResult
End Sub

Screenshot