Checkprod.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class Checkprod : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

        if (System.Web.HttpContext.Current.Session["Production"] as string == null)
        {
            Response.Redirect("Login.aspx");
        }
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection("Data Source=JOHN-PC;Initial Catalog=Skyminerals;Integrated Security=True");
        con.Open();
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from Productivity where Op_code like'" + TextBox7.Text + "%'";
        cmd.Connection = con;
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridView2.DataSource = ds;
        GridView2.DataBind();
        SqlDataReader dr;
        dr = cmd.ExecuteReader();

        if (dr.HasRows)
        {

            dr.Read();

            GridView1.Visible = false;
            GridView2.Visible = true;
            Label18.Visible = false;
            
        }

        else
        {
            GridView1.Visible = false;

            Response.Write("<script>alert('the search term is not available in the Records');</script>");

        }
    }
}