c# - PagedViewCollection group by column, not property -

i have these 2 classes:

class empidpaytypesettings {     public guid oid { get; set; }     public guid paytypeoid { get; set; }     public int grouptypeid { get; set; }     public guid empoid { get; set; }     public int orderby { get; set; } }  class docreghour {     public guid oid { get; set; }                   public guid documentoid { get; set; }         public guid medarbejderoid { get; set; }      public guid paytypeoid { get; set; }          public string paytypeinfo { get; set; }     public double hours { get; set; }     public string comment { get; set; }       public datetime createddate { get; set; }     public datetime lastchangeddate { get; set; }      } 

i have collection of docreghour bound datagrids itemsource. want them grouped grouptypeid, can see 2 classes have paytypeoid in common.

i tried making non-bound collapsed column header = "group" , set grouptypeid text in each row. wrote:

var pcv = new pagedcollectionview(datagriddayview.itemssource); pcv.groupdescriptions.add(new propertygroupdescription("group")); datagriddayview.itemssource = pcv; 

it doesn't work though. help?

to clarify. have:

ienumerable<docreghour> data; ienumerable<empidpaytypesettings> usersettings;  var pcv = new pagedcollectionview(data); datagriddayview.itemssource = pcv; 

which want group grouptypeid!, in different collection

if do:

// linq stuff need , group name give mydata.where(...).select(emp => new { group = emp.grouptypeid });  groupdescriptor descriptor = new groupdescriptor("group"); pcv.groupdescriptors.add(descriptor); 

it should work. i'm not entirely sure though understood data-model. found anonymous types pretty handy when comes similar situations :)