爲什麼我的Excel圖表生成的圖例與餅圖不符？

Question

我生成一個基本的Excel圖表與此代碼：

object misValue = System.Reflection.Missing.Value; 
//add data 
_xlSheet.Cells[11, 11] = "PhooBar"; 
_xlSheet.Cells[11, 12] = "Student1"; 
_xlSheet.Cells[11, 13] = "Student2"; 
_xlSheet.Cells[11, 14] = "Student3"; 

_xlSheet.Cells[12, 11] = "Term1"; 
_xlSheet.Cells[12, 12] = "80"; 
_xlSheet.Cells[12, 13] = "65"; 
_xlSheet.Cells[12, 14] = "45"; 

_xlSheet.Cells[13, 11] = "Term2"; 
_xlSheet.Cells[13, 12] = "78"; 
_xlSheet.Cells[13, 13] = "72"; 
_xlSheet.Cells[13, 14] = "60"; 

_xlSheet.Cells[14, 11] = "Term3"; 
_xlSheet.Cells[14, 12] = "82"; 
_xlSheet.Cells[14, 13] = "80"; 
_xlSheet.Cells[14, 14] = "65"; 

_xlSheet.Cells[15, 11] = "Term4"; 
_xlSheet.Cells[15, 12] = "75"; 
_xlSheet.Cells[15, 13] = "82"; 
_xlSheet.Cells[15, 14] = "68"; 

Excel.Range chartRange; 

Excel.ChartObjects xlCharts = (Excel.ChartObjects)_xlSheet.ChartObjects(Type.Missing); 
Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(468, 160, 348, 268); 
Excel.Chart chartPage = myChart.Chart; 

chartRange = _xlSheet.get_Range("K11", "O15"); // K == 11, O == 15 
chartPage.SetSourceData(chartRange, misValue); 
chartPage.ChartType = Excel.XlChartType.xlPieExploded; 

我有一個關於控制標籤位置here問題。

現在我想知道爲什麼有四條件，但五個項目上傳說：

ISTM該圖表引擎的傳奇應該匹配的餡餅。這是怎麼回事？

Answer 1

通過代碼更改爲此，餡餅和傳說對應：

object misValue = System.Reflection.Missing.Value; 
//add data 
_xlSheet.Cells[12, 11] = "Term1"; 
_xlSheet.Cells[12, 12] = "80"; 
_xlSheet.Cells[12, 13] = "65"; 
_xlSheet.Cells[12, 14] = "45"; 

_xlSheet.Cells[13, 11] = "Term2"; 
_xlSheet.Cells[13, 12] = "78"; 
_xlSheet.Cells[13, 13] = "72"; 
_xlSheet.Cells[13, 14] = "60"; 

_xlSheet.Cells[14, 11] = "Term3"; 
_xlSheet.Cells[14, 12] = "82"; 
_xlSheet.Cells[14, 13] = "80"; 
_xlSheet.Cells[14, 14] = "65"; 

_xlSheet.Cells[15, 11] = "Term4"; 
_xlSheet.Cells[15, 12] = "75"; 
_xlSheet.Cells[15, 13] = "82"; 
_xlSheet.Cells[15, 14] = "68"; 

Excel.Range chartRange; 

//return; 

Excel.ChartObjects xlCharts = (Excel.ChartObjects)_xlSheet.ChartObjects(Type.Missing); 
Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(468, 160, 348, 268); 
Excel.Chart chartPage = myChart.Chart; 

chartRange = _xlSheet.Range[_xlSheet.Cells[12, 11], _xlSheet.Cells[15, 14]]; 

我從「get_Range」更改爲更高效，更易於神交「範圍。[]」和現在有