jsreport excel xml attribute Format ISO-8601 date to custom `d-mmm-yy`

Question

Any idea how to format ISO-8601 date to custom d-mmm-yy ?

I'm struggling to format date from ISO-8601 to custom numFmtId=15 cell. From my searching I found:

• OpenXml and Date format in Excel cell, What do excel xml cell attribute values mean?, What's the difference between <c t="str"> and <c><is> in Office Open XML? give me headstart on understanding excel xml.

• Microsoft docs 1 which suggest <x:xf> and <cellStyleXfs>, Microsoft docs2 explaining about numFmts (Number Formats) which I haven't found how it's supposed to works in cell format.

• https://social.msdn.microsoft.com/Forums/office/en-US/c02fc9f9-0a7d-40b5-ac16-48199df474ba/spreadsheet-format-number?forum=oxmlsdk which suggest to make two different excel with the second being what you expected and compare the .xml the only difference I found was only in styles.xml which suggest numFmtId="15"

• http://www.ericwhite.com/blog/dates-in-strict-spreadsheetml-files/

• http://officeopenxml.com/SScontentOverview.php

• Applying number formatting in OpenXML

• https://social.msdn.microsoft.com/Forums/sqlserver/en-US/9c5d65f6-46d7-4767-be3f-24862dff4a78/open-xml-spreadsheet-style-error?forum=oxmlsdk

• What indicates an Office Open XML Cell contains a Date/Time value?

I was able to detect whether or not the column header that contains date keyword and whatever column value inside, but I was unable to format it properly.

The best I was able to found on jsreport related thread was: https://jsreport.net/learn/html-to-xlsx which wasn't helping me that much since I was using xlsx recipe.

You can see playground here which contains my progress so far.

Answer 1

To format cell you can add on style.xml:

  `<xf numFmtId="15" fontId="0" fillId="0" borderId="1" xfId="0" applyNumberFormat="1" applyFill="1" applyBorder="1" applyAlignment="1">
     <alignment horizontal="center" />
  </xf>`

And update which part which using that format. example: <c t="d" s="4">

You can see result on Playground here.

The most helpful resources from which I've linked in the question:

• https://social.msdn.microsoft.com/Forums/office/en-US/c02fc9f9-0a7d-40b5-ac16-48199df474ba/spreadsheet-format-number?forum=oxmlsdk help me a lot comparing the .xml to find the difference to add.

• What do excel xml cell attribute values mean? explaining what attributes do.