wpf - C# And XAML Line Series -

i'm stuck now.

i have code reads database amount of calls per hour, when come time mapping them graph, nothing shows...

how map using following command: ls.itemssource = enumerable.range(0, counter).select(k => new keyvaluepair<int, int>(callhour[k], callcounter[k])).toarray();

here code:

xaml:

    <dvc:chart name="chart"                background="#463f3f">                         <dvc:chart.plotareastyle>             <style targettype="grid">                 <setter property="background" value="transparent" />             </style>         </dvc:chart.plotareastyle>     </dvc:chart> 

c#:

using system; using system.collections.generic; using system.linq; using system.windows; using system.data; using system.data.sqlclient; using system.windows.data; using system.windows.controls.datavisualization.charting;  namespace wpfapplication1 { /// <summary> /// interaction logic mainwindow.xaml /// </summary> public partial class mainwindow : window {     public mainwindow()     {         initializecomponent();         allagenthourdata();     }      private void allagenthourdata()     {         string[] qid = new string[100];         int[] callhour = new int[100];         int[] callcounter = new int[100];         int qcounter = 0;         //int counter = 0;          sqlconnection sqlconnection1 = new sqlconnection("server=nl-reportserver;database=rc_dailer_wh;user id=sa;password=<password>");         sqlcommand cmd = new sqlcommand();         sqldatareader reader;         sqlconnection1.open();         //cmd.commandtext = "select distinct queueid rc_call_logs order queueid";         cmd.commandtext = "select convert(date, starttime, 120) calldate, queueid, datepart(hour,convert(datetime,starttime,111)) chour, count(id) numberofcalls rc_call_logs convert(date,starttime,120) = convert(date,getdate(),120) , queueid = 17000 group convert(date, starttime, 120), datepart(hour,convert(datetime,starttime,111)), queueid order calldate, queueid, chour";         cmd.commandtype = commandtype.text;         cmd.connection = sqlconnection1;            reader = cmd.executereader();         if (reader.hasrows)         {             while (reader.read())             {                 callhour[qcounter] = reader.getint32(2);                 callcounter[qcounter] = reader.getint32(3);                 qcounter++;             }         }         else         {             messagebox.show("no error message");         }         reader.close();         sqlconnection1.close();          lineseries ls = new lineseries();          ls.title = "17000";         ls.independentvaluebinding = new binding("key");         ls.dependentvaluebinding = new binding("value");          ls.itemssource = enumerable.range(0, qcounter).select(i=> new keyvaluepair<int, int>(callhour[i], callcounter[i])).toarray();      }  } } 

you need add line series chart

chart.series.add(ls);