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C# Gembox Spreadsheet - Read cell value which references to another excel file

I am working with GemBox Spreadsheet now to read Excel file using C#. In the Excel file, there is cell contains Date value which refers to another excel file.

The Excel Cell Formula Screenshot

In the C#, at first, I got zero value. Based on the GemBox Retrieving Calculated Values From a Spreadsheet or Flexcel post, I replaced the Load method into XlsxOptions.PreserveMakeCopy. After replacing, I got some random value, like 43257, instead of Date value. I am not sure what value it is.

C# debug value

Here is the code snippet

public void Export()


SpreadsheetInfo.SetLicense(FileExport.GemBoxLicenseKey);
ExcelFile ef = new ExcelFile();
FileExport file = new FileExport();
ef.LoadXlsx(locationPath + "\XX.xlsx", GemBox.Spreadsheet.XlsxOptions.PreserveMakeCopy);

ExcelWorksheet ws = ef.Worksheets[0];

try

int trackrowcount = 0;
int columncounter = 1;
DateTime date = DateTime.MinValue;

foreach (ExcelRow row in ws.Rows)

trackrowcount += 1;

if (trackrowcount < 4)
continue;

columncounter = 1;

foreach (ExcelCell cell in row.AllocatedCells)

if (cell.Value != null)

if (trackrowcount == 4 && columncounter == 2)

var cellFormula = cell.Formula;
var cellValue = cell.Value;

//Here is where I am trying to get the date value
date = Convert.ToDateTime(cellValue);


columncounter += 1;


// and so on

catch (Exception ex)





Is there any setting that I missed?

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