Filter GridView with first next previous and last paging using PagerSettings in ASP.Net

Hi sambath,

Please refer below sample.

Database

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

Download Northwind Database

HTML

<div>
    Name:
    <asp:TextBox ID="txtCountry" runat="server"></asp:TextBox>
    <asp:Button ID="btnSearch" runat="server" Text="Search" OnClick="btnSearch_Click" />
    <asp:GridView ID="gvCustomers" runat="server" AllowPaging="true" AutoGenerateColumns="false"
        OnPageIndexChanging="OnPageIndexChanging" PageSize="5">
        <PagerSettings Mode="NextPreviousFirstLast" FirstPageText="First" PreviousPageText="Previous"
            NextPageText="Next" LastPageText="Last" />
        <Columns>
            <asp:BoundField DataField="CustomerID" HeaderText="CustomerID" />
            <asp:BoundField DataField="ContactName" HeaderText="ContactName" />
            <asp:BoundField DataField="City" HeaderText="City" />
            <asp:BoundField DataField="Country" HeaderText="Country" />
        </Columns>
    </asp:GridView>
</div>

Namespaces

C#

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

VB.Net

Imports System.Data.SqlClient
Imports System.Data

Code

C#

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

private void BindGrid()
{
    string constr = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT CustomerID, ContactName, City, Country FROM Customers WHERE Country = @Country OR @Country IS NULL", con))
        {
            if (!string.IsNullOrEmpty(txtCountry.Text.Trim()))
            {
                cmd.Parameters.AddWithValue("@Country", txtCountry.Text.Trim());
            }
            else
            {
                cmd.Parameters.AddWithValue("@Country", DBNull.Value);
            }
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataTable dt = new DataTable();
                da.Fill(dt);
                gvCustomers.DataSource = dt;
                gvCustomers.DataBind();
            }
        }
    }
}

protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
{
    gvCustomers.PageIndex = e.NewPageIndex;
    this.BindGrid();
}
protected void btnSearch_Click(object sender, EventArgs e)
{
    this.BindGrid();
}

VB.Net

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

Private Sub BindGrid()
    Dim constr As String = ConfigurationManager.ConnectionStrings("conString").ConnectionString
    Using con As SqlConnection = New SqlConnection(constr)
        Using cmd As SqlCommand = New SqlCommand("SELECT CustomerID, ContactName, City, Country FROM Customers WHERE Country = @Country OR @Country IS NULL", con)
            If Not String.IsNullOrEmpty(txtCountry.Text.Trim()) Then
                cmd.Parameters.AddWithValue("@Country", txtCountry.Text.Trim())
            Else
                cmd.Parameters.AddWithValue("@Country", DBNull.Value)
            End If
            Using da As SqlDataAdapter = New SqlDataAdapter(cmd)
                Dim dt As DataTable = New DataTable()
                da.Fill(dt)
                gvCustomers.DataSource = dt
                gvCustomers.DataBind()
            End Using
        End Using
    End Using
End Sub

Protected Sub OnPageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
    gvCustomers.PageIndex = e.NewPageIndex
    Me.BindGrid()
End Sub

Protected Sub btnSearch_Click(ByVal sender As Object, ByVal e As EventArgs)
    Me.BindGrid()
End Sub

Screenshot