Search Record Display in GridView

In this blog we will know how to Search Records using TextBox and Display those values in GridView.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Search_Record_Display_in_GridView._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<
body>
    <form id="form1" runat="server">
    <div>
    <asp:Label ID="Label7" runat="server" Text="Search By Name"></asp:Label>
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
            ErrorMessage="Please insert name" ControlToValidate="TextBox1"></asp:RequiredFieldValidator>
    <asp:GridView ID="GridView1" runat="server">
    </asp:GridView>
    <asp:Button ID="btn_search" runat="server" Text="Search"
        onclick="btn_search_Click" /><br />
        <asp:Label ID="lblmsg" runat="server" BackColor="#FFFF66" Font-Bold="True"
            ForeColor="#FF3300"></asp:Label>
    </div>
    </form>
</body>
</
html> 

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

namespace Search_Record_Display_in_GridView
{
    public partial class _Default : System.Web.UI.Page
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlCommand cmd;
        SqlDataAdapter sqlda;
        DataSet ds;
        string str;
 
        protected void btn_search_Click(object sender, EventArgs e)
        {
            lblmsg.Text = "";
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            str = "select * from emp where name like '" + TextBox1.Text + "%'";
            cmd = new SqlCommand(str, conn);
            int count = Convert.ToInt32(cmd.ExecuteScalar());
            if (count > 0)
            {
                bind();
                GridView1.Visible = true;
            }
            else
            {
                lblmsg.Text = "No records found";
                GridView1.Visible = false;
            }
        }
 
        private void bind()
        {
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            str = "select * from emp where name like '" + TextBox1.Text + "%'";
            cmd = new SqlCommand(str, conn);
            sqlda = new SqlDataAdapter(cmd);
            ds = new DataSet();
            sqlda.Fill(ds, "emp");
            conn.Close();
            GridView1.DataSource = ds;
            GridView1.DataMember = "emp";
            GridView1.DataBind();
        }
    }
}