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How to use match function or similar with openxml

I'm creating two worksheets with openxml, I want to add a hyperlink from a cell in sheet 2 to a cell in sheet 1. I know that with Microsoft interop excel, you could use a match function to find the row number where a value is found. I was wondering how could the same task be done with openXML instead.
With Microsoft interop excel, I did something like this
var excelApp = new Application();
WorksheetFunction function = excelApp.WorksheetFunction;
var rowNumber = function.Match(currentItem.originID, sheet1.Range["B1","B" + rowCount], 0);
Where sheet1 is the sheet I'm searching through, and rowCount is how many rows there are in that sheet. This would find currentItem.originID in the range of column B and return the row number that the match was found
How could I do something similar to this but with openXML?

Excel, EPPlus, Formulas not properly evaluated

I am trying to insert a formula into an excel column using EPPlus and evaluate it in Excel. To be clear: no, I don't need the result at the runtime of the program.
This is my code:
using (ExcelRange range = worksheet.Cells[1, 1, rowCounter - 1, worksheet.Dimension.End.Column])
{
ExcelTable table = worksheet.Tables.Add(range, $"someName");
table.ShowHeader = true;
// insert calculated column
ExcelTableColumn column = table.Columns[0];
column.Name = "Remaining Runtime";
column.CalculatedColumnFormula = "=DAYS([DateOfRepayment],TODAY())";
}
The range includes a column with the header DateOfRepayment, the formula works if I select a field and then deselect it or when I just select the formula in the cell in Excel and hit enter. Before these steps, I have an Invalid Name Error referencing the [DateOfRepayment]. However, using just =[DateOfRepayment] as the formula works fine.
How can I insert this formula in EPPlus so that it will work in Excel?
(I am using EPPlus version 4.5.1)

At the moment of this answer, the formula you are referring "=DAYS()" is not supported by EPPlus. I know you are not looking for the result at the runtime of the program. But you can either replace that formula by the one that is supported by EPPlus or generate result at runtime.
https://github.com/JanKallman/EPPlus/wiki/Supported-Functions

Can you scan excel sheets for columns that have creditcard format data via C#

I'm working on a card number masking process. We get these human created excel documents in and need to mask a set of the digits, but its not always guaranteed that Column D is going to be the column with the card numbers. Could be Column D only, or D and G, etc. I know these documents will always have at least 10 rows not counting headers.
I want to run a scan of the worksheets in an excel workbook and detect which columns have data, then check the 3rd cell of each non null column. If it matches a numerical string at least 9 digits long, define that column as a card type in an array, then go back and iterate through the array of columns meeting that requirement and mask the desired characters. Is this reasonably doable between some C# methods and excel properties within the Interops library?

Yes, it is possible to do so. There are several libraries out there, that give you access to Excel documents and let you scan through worksheets, rows, columns and cell values.
Some libraries are based on the Interop COM interface Excel and start a background Excel process that does the real work of extracting the information.
Libraries like NPOI (for xls and xlsx) or the Open XML SDK (xlsx) access Excel files directly without the need of having Excel installed. This is extremly valuable for server side processing of Office documents. In NPOI sweeping through a Excel file looks like this (just to give you an idea).
var workbook = new XSSFWorkbook(dataStream);
var sheet = workbook.GetSheetAt(0);
var rowEnumerator = sheet.GetRowEnumerator();
while (rowEnumerator.MoveNext())
{
IRow row = (XSSFRow)_rowEnumerator.Current;
int colCount = row.LastCellNum;
var tableRow = new TableRow(colCount);
for (var c = 0; c < colCount; c++)
{
var cell = row.GetCell(c);
if (cell != null)
{
if (IsCreditCardNumber(c))
{
...
}
}
}
}

convert DataGridView Contents to Excel using SpreadSheetLight in C#

so i'm trying to export the contents in a DataGridView to an Excel File. And for me to do this, i am using SpreadSheetLight for C#. But as far as reading the Sample Codes and Tutorials go, they're only demonstrating manual Excel content creation:
using (SLDocument sl = new SLDocument())
{
sl.SetCellValue("B3", "It costs what for a Jimmy Choo?!?");
sl.SaveAs("MahNewShoes.xlsx");
}
but what i want to achieve is to convert a whole DataGridView into SpreadSheetLight's Excel. If i am using a loop and loop the whole rows and columns of the DataGridView, how is it possible to set the Columns to A, B, C ... AA, BB, CC given that the loop uses integers ?.
hoping someone can give me a walk through here. thanks

int i= 0;
SLDocument sl = new SLDocument();
foreach (DataRow row in dtTransfer.Rows)
{
sl[i, 0].SetCellValue("It costs what for a Jimmy Choo?!?");
sl.SaveAs("MahNewShoes.xlsx");
i++;
}

How to reorder columns in excel using C# interop

How to change index of columns in MS excel using interop?
Say I want to move column C to column A position
I wonder how to do this programatically using excel interop

Try This..
// cut column c and insert into A, shifting columns right
Excel.Range copyRange = xlWs.Range["C:C"];
Excel.Range insertRange = xlWs.Range["A:A"];
insertRange.Insert(Excel.XlInsertShiftDirection.xlShiftToRight, copyRange.Cut());