[C#] < WinForms> จะทำ Event Textbox ใน Gridview ทำไงครับ หาไม่เจออ || ง า น ห ย า บ

 //creat auto complete Collection
            AutoCompleteStringCollection collection = new AutoCompleteStringCollection();
            //Connection String
            string connectionString = "Data Source=5555.55555.5555555;Initial Catalog=DB;Persist Security Info=True;User ID=id;Password=password";
            //creating connection String
            SqlConnection con = new SqlConnection(connectionString);
            //open the connection
            con.Open();
            //get the data from database
            SqlDataAdapter ad = new SqlDataAdapter("select CUSTOMER_NAME from MT_FLST_QT_QUOTATION", con);
            DataTable dt = new DataTable();
            ad.Fill(dt);
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    //add the student name into auto complete collection
                    collection.Add(dt.Rows[i].ItemArray[0].ToString());
                }
            }
            //after adding the student names into auto complete collection bind the collection to textbox
            txt_customer_name.AutoCompleteMode = AutoCompleteMode.Suggest;
            txt_customer_name.AutoCompleteSource = AutoCompleteSource.CustomSource;
            txt_customer_name.AutoCompleteCustomSource = collection;