c# - Can't see complete stackpanel in printout -

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i've been trying print out data column headers using stackpanels working , printout. problem stackpanel gets cut off after fixed width , i'm not sure property responsible it. it's printer sees rectangular limit on stackpanel has width shorter stackpanel , prints in rectangle. can't explain without picture don't have scanner.

heres code it:

private void btnprint_click(object sender, routedeventargs e)     {         printdialog dialog = new printdialog();         if (dialog.showdialog().getvalueordefault())         {             list<result> results = vm.obsresults.orderbydescending(r => convert.todouble(r.schedulingrate)).tolist();             var proplist = typeof(result).getproperties().tolist();             int maxrowsperpage = 42;              var pgcnt = results.count / maxrowsperpage;              xpsdocumentwriter docwriter = printqueue.createxpsdocumentwriter(dialog.printqueue);             printticket ticket = new printticket();             ticket.pageorientation = pageorientation.landscape;              (int pgnum = 0; pgnum <= pgcnt; pgnum++)             {                 //title                 canvas c = new canvas();                 c.width = 1024;                 c.height = 768;                 textblock tbtitle = new textblock();                 tbtitle.text = " results " + vm.obsdate.tostring("mm/dd/yyyy");                 tbtitle.fontsize = 16;                 canvas.setleft(tbtitle, 20);                 canvas.settop(tbtitle, 10);                 c.children.add(tbtitle);                  //column headers                 stackpanel sp = new stackpanel() { orientation = orientation.horizontal , width = 885};                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "unit name", width = 150, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "unit id", width = 65, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "schedule", width = 65, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "tps", width = 25, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "tts", width = 35, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "min run", width = 50, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "schd rt", width = 50, background = new solidcolorbrush(colors.lightblue) }});                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "mw", width = 35, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "00", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "01", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "02", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "03", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "04", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "05", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "06", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "07", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "08", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "09", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "10", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "11", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "12", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "13", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "14", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "15", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "16", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "17", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "18", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "19", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "20", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "21", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "22", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 0, 1), child = new textblock() { text = "23", width = 15, textalignment = textalignment.center, background = new solidcolorbrush(colors.lightblue) } });                 sp.children.add(new border() { borderbrush = new solidcolorbrush(colors.lightgray), borderthickness = new thickness(1, 1, 1, 1), child = new textblock() { text = "constraint", width = 100, background = new solidcolorbrush(colors.lightblue) } });                 canvas.setleft(sp, 20);                 canvas.settop(sp, 35);                 c.children.add(sp);                  int idxstart = pgnum * maxrowsperpage;                 int idxend = math.min(results.count, idxstart + maxrowsperpage);                  int topmargin = 3;                 }                 c.measure(new size(int32.maxvalue, int32.maxvalue));                 c.arrange(new rect(new point(0, 0), c.desiredsize));                  fixedpage fxdpg = new fixedpage();                 fxdpg.children.add(c);                 pagecontent pgcontent = new pagecontent();                 ((iaddchild)pgcontent).addchild(fxdpg);                 fxddoc.pages.add(pgcontent);             }              docwriter.writeasync(fxddoc, ticket);         }     }

it looks gets cut off:

00 | 01 | 02 | ... |18 | 19 | 2/  <cut off.

no 21, 22, 23, headers.


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