seeCreating Custom Columns for the ASP.NET Datagrid
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/creatingcustomcolumns.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/creatingcustomcolumns.asp
thanks。
DataColumn dc1 = ds.Tables["FormInfo"].Columns["QuestionID"];
DataColumn dc2 = ds.Tables["MarkTable"].Columns["QuestionID"];
DataRelation drel = new DataRelation("QuestionAndMark", dc1, dc2);
ds.Relations.Add(drel); dgrd3.DataSource=ds.Tables["FormInfo"];
dgrd3.DataBind(); //绑定组列表