使用现有文件的 EPPlus 更改数据透视表的范围

Question

Is it possible to change the range of pivot table and then refresh the values with EPPlus of an existening file?

Now I use EPPlus in conjunction with Excel Interopt... EPPlus add new sheet with data in an existing xlsx with a well defined pivot table... then I refresh the data source with code like this:

private bool RefreshPivotTable(string file, string sheetName, string pivotTableName, string sourceData)
    {
        try
        {
            Type excelType = Type.GetTypeFromProgID("Excel.Application");

            dynamic excel = Activator.CreateInstance(excelType);
            dynamic workbook = excel.Workbooks.Open(file);
            dynamic sheet = workbook.Sheets[sheetName];
            dynamic pivotTable = sheet.PivotTables(pivotTableName);

            pivotTable.SourceData = sourceData;
            pivotTable.RefreshTable();

            workbook.Save();
            workbook.Close();
            excel.Application.Quit();

            return true;
        }
        catch(Exception ex)
        {
            return false;
        }
    }

But I Would like do all with EPPlus. Thanks.

Answer 1

With EPPlus:

            var excelWorkbook = new FileInfo(excelWorkbookPath);
            using (var excelPackage = new ExcelPackage(excelWorkbook))
            {
                var rawDataWorksheet = excelPackage.Workbook.Worksheets[RawDataWorksheetName];

                var pivotTableWorksheet = excelPackage.Workbook.Worksheets[PivotTableWorksheetName];
                pivotTableWorksheet.PivotTables[0 /* Or whichever index */].CacheDefinition.SourceRange = rawDataWorksheet.Cells[rawDataWorksheet.Dimension.Start.Row, rawDataWorksheet.Dimension.Start.Column, rawDataWorksheet.Dimension.End.Row, rawDataWorksheet.Dimension.End.Column];
            }

---

And if you're using a template Excel workbook (as opposed to creating a brand new workbook), you should also do the following:

1. Go to Pivot Table options and check 'Refresh data when opening the file': https://www.extendoffice.com/documents/excel/1859-excel-refresh-pivot-table-on-open.html .

2. (Optional) If desired, users can disable 'Protected View' inside of their Excel installation: http://www.corporatefocus.com/support/how-to-disable-protected-view-in-microsoft-excel#:~:text=In%20Excel%20go%20to%20File,Enable%20All%20Macros%20by%20default .

Answer 2

I am afraid that is possible only in part.

Looking at the EPPlus documentation , you will find documentation about Pivot Tables and its Pivot Cache with Source Range and similar properties. But no account is given about refreshing pivot tables. This should be done upon opening the workbook in Excel - maybe that is soon enough for you?

Anyway, my understanding of EPPlus is reading manipulating the structure of Excel files , not doing any calculations in them - that remains in the domain of the Excel application itself.

Amendment: I have to correct myself: general calculation is possible as of EPPlus Version 4 according to this tutorial page , you can run worksheet.Calculate() and other commands. But still no mentioning of pivot tables.