CS中实现google搜索的自动完成功能！

           string str = ""; SqlConnection conn = new SqlConnection("server=.;database=netral;uid=sa;pwd=123456"); conn.Open(); SqlCommand cmd = new SqlCommand("select * from tral_piaojia",conn); SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); foreach (DataRow dr in ds.Tables[0].Rows) { str += "," + dr["jingdianname"]; } conn.Close(); str = str.Substring(1); this.textBox1.AutoCompleteCustomSource.AddRange(str.Split(','));     this.textBox1.AutoCompleteCustomSource.AddRange(str.Split(','));