Для тех, кто пытается это понять. В итоге я использовал раскрывающийся список проверки данных и создал строку динамической таблицы (вне базовой таблицы), на которой основана динамическая диаграмма. Строка динамической таблицы изменяется в зависимости от значения раскрывающегося списка проверки данных (вам нужно почувствовать, что Excel может сделать это, чего у меня не было):
class Program
{
static void Main(string[] args)
{
// Creating an instance
// of ExcelPackage
ExcelPackage excel = new ExcelPackage();
// name of the sheet
var workSheet = excel.Workbook.Worksheets.Add("testSheet");
//init table
var randTable = new DataTable();
randTable.TableName = "randTable";
//init columns
var countColumn = new DataColumn()
{
DataType = typeof(int),
ColumnName = "Count",
ReadOnly = true,
Unique = true
};
var randomColumn0 = new DataColumn()
{
DataType = typeof(int),
ColumnName = "Random-0",
ReadOnly = true,
Unique = false
};
var randomColumn1 = new DataColumn()
{
DataType = typeof(int),
ColumnName = "Random-1",
ReadOnly = true,
Unique = false
};
//add columns to table
randTable.Columns.AddRange(new DataColumn[] { countColumn, randomColumn0, randomColumn1 });
//init data validation
ExcelRange dropdownRange = workSheet.Cells[12, 1, 12, 3];
var dropdownValidation = workSheet.DataValidations.AddListValidation(dropdownRange.Address);
workSheet.Names.Add("count", dropdownRange);
//style data validation
dropdownRange.Merge = true;
workSheet.Cells[dropdownRange.Address].Style.Fill.PatternType = ExcelFillStyle.Solid;
workSheet.Cells[dropdownRange.Address].Style.Fill.BackgroundColor.SetColor(Color.Yellow);
workSheet.Cells[dropdownRange.Address].Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
var rand = new Random();
for (var i = 0; i < 10; i++)
{
//add table first column values to validation list
dropdownValidation.Formula.Values.Add(i.ToString());
var row = randTable.NewRow();
row[countColumn] = i;
row[randomColumn0] = rand.Next(0, 100);
row[randomColumn1] = rand.Next(0, 100);
randTable.Rows.Add(row);
}
//make the tableIndexer cell. This cell will be used to get the
//table indices for the selected table row cells
ExcelRange randTableIndexer = workSheet.Cells[12, 4, 12, 4];
randTableIndexer.Formula = "MATCH(INDEX(count,1,1), randTable[Count], 0)";
workSheet.Cells[randTableIndexer.Address].Style.Fill.PatternType = ExcelFillStyle.Solid;
workSheet.Cells[randTableIndexer.Address].Style.Fill.BackgroundColor.SetColor(Color.LightGreen);
workSheet.Cells[randTableIndexer.Address].Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
workSheet.Names.Add("tableIndex", randTableIndexer);
//make the cells based off the table at row(randTableIndexer.value)
ExcelRange graphCells = workSheet.Cells[13, 1, 13, 3];
graphCells.CreateArrayFormula("INDEX(randTable[], tableIndex, 0)"); //need [] on table names in epplus formulas
workSheet.Cells[graphCells.Address].Style.Fill.PatternType = ExcelFillStyle.Solid;
workSheet.Cells[graphCells.Address].Style.Fill.BackgroundColor.SetColor(Color.LightBlue);
workSheet.Cells[graphCells.Address].Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
graphCells.Calculate();
//add table to workSheet
workSheet.Cells[1, 1].LoadFromDataTable(randTable, true, OfficeOpenXml.Table.TableStyles.Medium15);
workSheet.Cells.AutoFitColumns();
//add dynamic chart
var chart = workSheet.Drawings.AddChart("rands", eChartType.Pie) as ExcelPieChart;
chart.Title.Text = "rands";
chart.Series.Add(graphCells.Address, ExcelRange.GetAddress(1, 1, 3, 1));
chart.Legend.Position = eLegendPosition.Bottom;
chart.SetSize(500, 400);
chart.SetPosition(60, 500);
WriteToFile(excel);
}
public static void WriteToFile(ExcelPackage package)
{
// file name with .xlsx extension
string p_strPath = "C:\\your\\file\\path";
if (File.Exists(p_strPath))
File.Delete(p_strPath);
// Create excel file on physical disk
FileStream objFileStrm = File.Create(p_strPath);
objFileStrm.Close();
// Write content to excel file
File.WriteAllBytes(p_strPath, package.GetAsByteArray());
}
}