c# - how to have columns on GridView with different data sources? -

i trying dynamically create gridview. 1 of columns user created row.

jobdebrief jd = new jobdebrief(jobid); job jb = new job(jobid); datagrid db = jobclass.job_piece.buildgrid(); db.columns.add(createboundcolumn(jd.dbriefedbyuser, "user")); placeholder.controls.add(db); db.datasource = jb.pieces; db.databind(); 

i created gridview in buildgrid function in job_piece class.

    public static datagrid buildgrid()     {           datagrid newdg = new datagrid();            newdg.datakeyfield = "id";           newdg.autogeneratecolumns = false;           newdg.cssclass = "tblresults";           newdg.headerstyle.cssclass = "tblresultsheader";           newdg.alternatingitemstyle.cssclass = "resultsstylealt";           newdg.itemstyle.cssclass = "resultsstyle";            newdg.columns.add(load.createboundcolumn("advisedqty", "qty advised"));           newdg.columns.add(load.createboundcolumn("piecetypestring", "piece type"));           newdg.columns.add(load.createboundcolumn("receivedqty", "rcvd qty"));                      newdg.width = unit.percentage(100.00);            return newdg;     }  public static boundcolumn createboundcolumn(string datafield, string header,string cssclass ="",bool highlight = false)     {         boundcolumn column = new boundcolumn();         column.datafield = datafield;         column.headertext = header;         column.sortexpression = datafield;          if (highlight)         {             column.itemstyle.cssclass = "columnhighlight";         }          if (!string.isnullorempty(cssclass))         {             column.itemstyle.cssclass = cssclass;         }         return column;     } 

the 3 columns displaying come job_piece. since user doesn't belong class tried create column outside of function.

the column displays header rows blank. username comes jobdebrief class. since binding gridview pieces, db.datasource = jb.pieces; not finding information. possible set user column different datasource?

the simplest answar create new datatable , assign values in it

  datatable dt= jb.pieces.copytodatatable();   dt.columns.add("userid")   for(int i=0;i<dt.rows.count;i++)   {         dt.rows[i]=//your info   }   db.datasource = dt;   db.databind();