dataview as a datasource

DataView dv = new DataView();
//Dataview and the stuff
dv.Table=ds.Tables[0];
dv.RowFilter="age=20";
DataGrid1.DataSource=dv;

creating a pop up calendar control in ASP.net

the following links seems to be a viable option for a postback less date popup http://www.developer.com/net/asp/article.php/3327181