C# 以win格式显示无效数据的图表

我希望有人能帮助我理解这个图表的行为。 基于下面的XML

<ChartData>
 <ChartData Count="157">
  <Year>2012</Year> 
  <MonthString>April</MonthString> 
  <Month>4</Month> 
  </ChartData>
 <ChartData Count="196">
  <Year>2012</Year> 
  <MonthString>May</MonthString> 
  <Month>5</Month> 
  </ChartData>
 <ChartData Count="181">
  <Year>2012</Year> 
  <MonthString>June</MonthString> 
  <Month>6</Month> 
  </ChartData>
 <ChartData Count="222">
  <Year>2012</Year> 
  <MonthString>July</MonthString> 
  <Month>7</Month> 
  </ChartData>
 <ChartData Count="261">
  <Year>2012</Year> 
  <MonthString>August</MonthString> 
  <Month>8</Month> 
  </ChartData>
 <ChartData Count="163">
  <Year>2012</Year> 
  <MonthString>September</MonthString> 
  <Month>9</Month> 
  </ChartData>
 <ChartData Count="161">
  <Year>2012</Year> 
  <MonthString>October</MonthString> 
  <Month>10</Month> 
  </ChartData>
 <ChartData Count="181">
  <Year>2012</Year> 
  <MonthString>November</MonthString> 
  <Month>11</Month> 
  </ChartData>
 <ChartData Count="184">
  <Year>2012</Year> 
  <MonthString>December</MonthString> 
  <Month>12</Month> 
  </ChartData>
 <ChartData Count="227">
  <Year>2013</Year> 
  <MonthString>January</MonthString> 
  <Month>1</Month> 
  </ChartData>
 <ChartData Count="194">
  <Year>2013</Year> 
  <MonthString>February</MonthString> 
  <Month>2</Month> 
  </ChartData>
 <ChartData Count="177">
  <Year>2013</Year> 
  <MonthString>March</MonthString> 
  <Month>3</Month> 
  </ChartData>
 <ChartData Count="74">
  <Year>2013</Year> 
  <MonthString>April</MonthString> 
  <Month>4</Month> 
  </ChartData>
  </ChartData>

当我看图表时，我看到两个不同的问题

图表并没有显示所有月份。 图表显示的数据不正确，显示的是2003年的数据 这是我用来查询数据和获取XML的查询

   var chartgrouped = (from x in data  group x by new { x.DateOpened.Month, x.DateOpened.Year } into g
            select new ChartData
                                {
                                    Year = g.Key.Year,
                                    Month = g.Key.Month,
                                    MonthString = string.Format("{0}",
                                    CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(g.Key.Month)),
                                    Count = g.Count()
                               }) .ToList();

这是我得到的屏幕截图

   var chartgrouped = (from x in data  group x by new { x.DateOpened.Month, x.DateOpened.Year } into g
            select new ChartData
                                {
                                    Year = g.Key.Year,
                                    Month = g.Key.Month,
                                    MonthString = string.Format("{0}",
                                    CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(g.Key.Month)),
                                    Count = g.Count()
                               }) .ToList();