ทำ search database แล้วแสดง เป็น gridview ASP.NET C#

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
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;

public partial class AdminCustSearch : System.Web.UI.Page
{
    DataSet ds = new DataSet();
    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string strConn1 = "Data Source=MIXAR-PC;Initial Catalog=StockProductInfo;Integrated Security=True";

            SqlConnection Conn1 = new SqlConnection(strConn1);
            if (Conn1.State == ConnectionState.Open)
            {
                Conn1.Close();
            }
            Conn1.ConnectionString = strConn1;
            Conn1.Open();

            string sqlCustType;
            sqlCustType = "SELECT DISTINCT CustType_ID, CustType_Name ";
            sqlCustType += "FROM tabCustomerType ";
            sqlCustType += "WHERE (CustType_Status LIKE 'yes')";
            sqlCustType += "ORDER BY CustType_Name";

            SqlDataAdapter da1 = new SqlDataAdapter(sqlCustType, Conn1);
            DataSet ds1 = new DataSet();
            da1.Fill(ds1, "CustType");
            ddlCustomerType.DataSource = ds1.Tables["CustType"];
            ddlCustomerType.DataValueField = "CustType_Name";
            ddlCustomerType.DataTextField = "CustType_Name";
            ddlCustomerType.DataBind();
            ListItem firstItem = new ListItem("Select...", "Select...");
            ddlCustomerType.Items.Insert(0, firstItem);

            Conn1.Close();
        }
    }

    protected void btnSearch_Click(object sender, EventArgs e)
    {
        string strConn2 = "Data Source=MIXAR-PC;Initial Catalog=StockProductInfo;Integrated Security=True";

        SqlConnection Conn2 = new SqlConnection(strConn2);
        if (Conn2.State == ConnectionState.Open)
        {
            Conn2.Close();
        }
        Conn2.ConnectionString = strConn2;
        Conn2.Open();

        string sqlCustSearch;
        sqlCustSearch = "SELECT DISTINCT masCustomer.Cust_ID AS CustID, ";
        sqlCustSearch += "masCustomer.Cust_FName AS Firstname, ";
        sqlCustSearch += "masCustomer.Cust_LName AS Lastname, ";
        sqlCustSearch += "masCustomer.Cust_Tel AS Telephone, ";
        sqlCustSearch += "tabCustomerType.CustType_Name AS Type ";
        sqlCustSearch += "FROM masCustomer, tabCustomerType ";
        sqlCustSearch += "WHERE (masCustomer.CustType_ID = tabCustomerType.CustType_ID)";

        if (ddlCustomerType.SelectedItem.Value != "Select...")
        {
            sqlCustSearch += "AND (tabCustomerType.CustType_Name = '" + ddlCustomerType.SelectedItem.Text + "')";
        }
        if (txtCustID.Text != "")
        {
            sqlCustSearch += "AND (masCustomer.Cust_ID LIKE '" + txtCustID.Text + "%')";
        }
        if (txtFirstname.Text != "")
        {
            sqlCustSearch += "AND (masCustomer.Cust_FName LIKE '" + txtFirstname.Text + "%')";
        }
        if (txtLastname.Text != "")
        {
            sqlCustSearch += "AND (masCustomer.Cust_LName LIKE '" + txtLastname.Text + "%')";
        }
        if (txtTelephone.Text != "")
        {
            sqlCustSearch += "AND (masCustomer.Cust_Tel LIKE '" + txtTelephone.Text + "%')";
        }

        SqlDataAdapter da3 = new SqlDataAdapter(sqlCustSearch, Conn2);
        da3.Fill(ds, "Customers");

        dgvCustResult.DataSource = ds.Tables["Customers"];      //เอาไปโชว์ในดาต้ากริดวิว
        dgvCustResult.DataBind();
        
        if (dgvCustResult.Rows.Count <= 0)
        {
            Response.Write("<script type='text/javascript'>alert('Search not found!!');</script>");
            ddlCustomerType.SelectedValue = "Select...";
            txtCustID.Text = "";
            txtFirstname.Text = "";
            txtLastname.Text = "";
            txtTelephone.Text = "";
        }
        else
        {
            dgvCustResult.Visible = true;
        }

        Conn2.Close();
    }

    //method นี้ ผมมีปุ่ม select เป็น button field ไว้สำหรับดึงค่า ไปโชว์อีกเพจอะครับ 
    protected void dgvCustResult_SelectedIndexChanged(object sender, EventArgs e)
    {
        string custID, custFName, custLName, custName;
        custID = dgvCustResult.SelectedRow.Cells[0].Text;
        custFName = dgvCustResult.SelectedRow.Cells[1].Text;
        custLName = dgvCustResult.SelectedRow.Cells[2].Text;
        custName = custFName + " " + custLName;

        Session["custFullName"] = custName;
        Session["custID"] = custID;

        Response.Redirect("AdminNewOrder.aspx");
    }
}

<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.SqlClient"%>
<%@ Page Language="C#" Debug="true" %>
<script runat="server">
		String strKeyWord;
		void Page_Load(object sender,EventArgs e)		
		{
			strKeyWord = this.txtKeyWord.Text;
		}

		void BindData()
		{
			SqlConnection objConn = new SqlConnection();
			SqlCommand objCmd = new SqlCommand();
			SqlDataAdapter dtAdapter = new SqlDataAdapter();
			DataSet ds = new DataSet();
			String strConnString,strSQL;

			strConnString = "Server=localhost;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";
			strSQL = "SELECT * FROM customer WHERE (Name like '%"+ strKeyWord +"%' OR Email like '%"+ strKeyWord +"%') ";

			objConn.ConnectionString = strConnString;
			objCmd.Connection = objConn;
			objCmd.CommandText = strSQL	;
			objCmd.CommandType = CommandType.Text;


			dtAdapter.SelectCommand = objCmd;

			dtAdapter.Fill(ds);

			//*** BindData to GridView ***//
			myGridView.DataSource = ds;
			myGridView.DataBind();

			dtAdapter = null;		
			objConn.Close();
			objConn = null;

	}

	void myGridView_RowDataBound(Object s, GridViewRowEventArgs e) 
	{
		//*** CustomerID ***//
		Label lblCustomerID = (Label)(e.Row.FindControl("lblCustomerID"));
		if (lblCustomerID != null)
		{
			lblCustomerID.Text = (string)DataBinder.Eval(e.Row.DataItem, "CustomerID");
		}

		//*** Email ***//
		Label lblName = (Label)(e.Row.FindControl("lblName"));
		if (lblName != null)
		{
			lblName.Text = (string)DataBinder.Eval(e.Row.DataItem, "Name");
		}

		//*** Name ***//
		Label lblEmail = (Label)(e.Row.FindControl("lblEmail"));
		if (lblEmail != null)
		{
			lblEmail.Text = (string)DataBinder.Eval(e.Row.DataItem, "Email");
		}

		//*** CountryCode ***//
		Label lblCountryCode = (Label)(e.Row.FindControl("lblCountryCode"));
		if (lblCountryCode != null)
		{
			lblCountryCode.Text = (string)DataBinder.Eval(e.Row.DataItem, "CountryCode");
		}

		//*** Budget ***//
		Label lblBudget = (Label)(e.Row.FindControl("lblBudget"));
		if (lblBudget != null)
		{
			lblBudget.Text = DataBinder.Eval(e.Row.DataItem, "Budget").ToString();
		}

		//*** Used ***//
		Label lblUsed = (Label)(e.Row.FindControl("lblUsed"));
		if (lblUsed != null)
		{
			lblUsed.Text = DataBinder.Eval(e.Row.DataItem, "Used").ToString();
		}
	}

	void btnSearch_Click(Object sender, EventArgs e)
	{
		BindData();
	}

</script>
<html>
<head>
    <title>ThaiCreate.Com ASP.NET - SQL Server</title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Label id="lblKeyword" runat="server" text="Keyword"></asp:Label>
        <asp:TextBox id="txtKeyWord" runat="server"></asp:TextBox>
        <asp:Button id="btnSearch" onclick="btnSearch_Click" runat="server" Text="Search"></asp:Button>
        <br />
        <br />
        <asp:GridView id="myGridView" runat="server"
		AutoGenerateColumns="False" onRowDataBound="myGridView_RowDataBound">
            <HeaderStyle backcolor="#cccccc"></HeaderStyle>
            <AlternatingRowStyle backcolor="#e8e8e8"></AlternatingRowStyle>
            <Columns>
                <asp:TemplateField HeaderText="CustomerID">
                    <ItemTemplate>
                        <asp:Label id="lblCustomerID" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Name">
                    <ItemTemplate>
                        <asp:Label id="lblName" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Email">
                    <ItemTemplate>
                        <asp:Label id="lblEmail" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="CountryCode">
                    <ItemTemplate>
                        <asp:Label id="lblCountryCode" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Budget">
                    <ItemTemplate>
                        <asp:Label id="lblBudget" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Used">
                    <ItemTemplate>
                        <asp:Label id="lblUsed" runat="server"></asp:Label> 
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </form>
</body>
</html>