不使用sqldatasource 如何绑定字段到gridview ？？？

using(SqlConnection con = new SqlConnection("连接字符串")){
using(SqlDataAdapter adapter = new SqlDataAdapter("查询字符串", con)){
DataTable result = new DataTable();
adapter.Fill(result);
gridview.DataSource = result;
gridview.DataBind();
}
}

和03的时候绑定一样的啊！
如datatable dt=new datatable();
gridview.datasource=dt;
gridview.databind();