使用C#和Excel进行报表开发（二）－操作统计图（Chart）

http://www.cnblogs.com/fmxyw/archive/2008/09/09/1287841.html

下面的代码使用一个现有的统计图Excel文件，加载这个文件，设置某一项的值和统计图的表示方式，然后保存到另一个Excel文件里。如果是VS2005+Office2003，也可以选择使用Visual Studio Tools for Office来作。
Excel.Application m_objExcel = null;
Excel._Workbook m_objBook = null;
Excel._Chart m_objChart = null;
Excel.ChartGroup m_objChartGroup = null;
Excel.Series m_objSeries = null;
object m_objOpt = System.Reflection.Missing.Value;
try
{
m_objExcel = new Excel.Application();
m_objBook = m_objExcel.Workbooks.Open("z://Book11.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);
m_objChart = (Excel._Chart)m_objExcel.Charts.get_Item(1);
m_objChart.BarShape = Excel.XlBarShape.xlCylinder;
m_objChartGroup = (Excel.ChartGroup)m_objChart.ChartGroups(1);
m_objSeries = (Excel.Series)m_objChartGroup.SeriesCollection(1);

m_objSeries.Values = 456;
m_objExcel.DisplayAlerts = false;

m_objBook.SaveAs("z://Book2.xls", m_objOpt, m_objOpt,
m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,
m_objOpt, m_objOpt, m_objOpt, m_objOpt);

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
m_objBook.Close(m_objOpt, m_objOpt, m_objOpt);
m_objExcel.Workbooks.Close();

m_objExcel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBook);
System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objExcel);
m_objBook = null;
m_objExcel = null;
GC.Collect();
this.Close();
}

源Excel文件中的统计图：



经过代码处理后保存的统计图：