String   strConnection=ConfigurationSettings.AppSettings["result"];   
        SqlConnection   objConnection=new   SqlConnection(strConnection);   
        String   strSQL="SELECT  top 5*    FROM   teacher";   
        SqlDataAdapter   objAdapter=new   SqlDataAdapter(strSQL,objConnection);   
        DataSet   objDataSet=new   DataSet();   
        objAdapter.Fill(objDataSet);   
        objConnection.Close();   
        teacher1.DataSource=objDataSet;   
        teacher1.DataBind();