DataTable DT = new DataTable();
DataSet DS = new DataSet();
string strConn = "server=(Local); Initial Catalog=MeterDataBase; Integrated Security=SSPI";
string SQLstr = "SELECT * FROM dbo.Meter_CustomerInfo";
SqlConnection sqlconn = new SqlConnection(strConn);
SqlDataAdapter DA = new SqlDataAdapter(SQLstr,sqlconn);
DA.Fill(DS,"TEST");
DT=DS.Tables["TEST"];
sqlconn.Dispose();
dataGridView1.DataSource = DT.DefaultView;