seach หาข้อมูลค่ะ search ค่าที่ไม่มีในฐานข้อมูลค่าที่โชว์ก่อนหน้านี้ไม่หายค่ะ asp.net c#

   string _query = "SELECT *  FROM test where id= '" + TextBox2.Text + "'  ";
        SqlDataAdapter da2 = new SqlDataAdapter(_query, Conn2);
        DataSet ds2 = new DataSet();
        da2.Fill(ds2);


        int _row = ds2.Tables[0].Rows.Count;

        for (int i = 0; i < _row; i++)
        {
            TextBox3.Text = (string)ds2.Tables[0].Rows[i]["name"].ToString();
            Label2.Text = (string)ds2.Tables[0].Rows[i]["name"].ToString();
            TextBox1.Text = (string)ds2.Tables[0].Rows[i]["mon"].ToString();
            Label1.Text = ds2.Tables[0].Rows[i]["mon"].ToString();
            Label3.Text = (string)ds2.Tables[0].Rows[i]["namecut"].ToString();
           



        }
        if (Label3.Text != "")
        {
            String[] myArr = Label3.Text.Split(' ');
            //  int n = 0;

            foreach (String myList in myArr)
            {
                this.Label4.Text = " " + myArr[0] + " ";
                this.Label5.Text = " " + myArr[1] + " ";

            }
        }