openxml - Programmatically format a date in an excel sheet using Office Open Xml SDK -

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i'm building excel xlsx spreadsheet using office open xml sdk. can add dates sheet converting them "ao" date representation , setting cell value number. can't, however, figure out how add dd-mm-yy formatting cell.

i've seen lot of complicated examples have create stylesheet scratch, add format , reference format, figure there must easier way. i'm creating sheet template, , excel has builtin formats/styles. imo should able load stylesheet excel file i'm using template , apply format. can't figure out how though.

if you're creating xlsx scratch can't avoid creating style sheet. minimally need style sheet , cell format element. cell format element can reference built-in date format in case can avoid custom number format, if want date format isn't built-in need number format element too.

if you're creating xlsx template xlsx, can reference cell format that's defined, can sensitive since references based on index, safer looking through defined cell formats find 1 matches date format want opposed hard-coding cell format index.


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