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();
}
}
}