url传值的格式问题

[seyon1]

ButtonMenu.ModifyPostBackUrl = "~/webpage/pagebby2.aspx?type=Edit&billno=" + GridView1.SelectedDataKey["billno"].ToString()+" & linenumber = "+GridView1.SelectedDataKey["linenumber"].ToString()+";

就是要传三个值type，billno，linenumber，请给一个正确格式，另外url格式我老搞不清楚，特别是那些“和‘以及＋，格式该是怎样的？

[daishengs]

ButtonMenu.ModifyPostBackUrl = "webpage/pagebby2.aspx?type=Edit&billno=" + GridView1.SelectedDataKey["billno"].ToString() + "&linenumber =" + GridView1.SelectedDataKey["linenumber"].ToString();

就是要传三个值type，billno，linenumber，请给一个正确格式，另外url格式我老搞不清楚，特别是那些“和‘以及＋，格式该是怎样的？

[xiaohutushen]

ButtonMenu.ModifyPostBackUrl = string.Format("~/webpage/pagebby2.aspx?type=Edit&billno={0}&linenumber ={1}",GridView1.SelectedDataKey["billno"].ToString(), GridView1.SelectedDataKey["linenumber"].ToString());

[DePaul]

ButtonMenu.ModifyPostBackUrl = string.Format("~/webpage/pagebby2.aspx?type=Edit&billno={0}&linenumber ={1}",Server.UrlEncode(GridView1.SelectedDataKey["billno"].ToString()), Server.UrlEncode(GridView1.SelectedDataKey["linenumber"].ToString()));