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NPOI latest 2.5.1 how to insert in the header footer images

Time:11-14

Such as title, found two days on the Internet, didn't find the solution, the official also there is no standard documents, this project is no maintenance,,,

Most all of the code on the Internet to find just add text, a few demo to join pictures are older AddPicture method, but the new NPOI are now only at the bottom of the head AddPictureData this method, after changing the method has been prompt "unbounded instance object, such as" ever player to do this project, please mention point,

. In addition, also tried to use aspose and free spire, these are all want to charge, add the watermark all free,,,,,,,,

Look at the JAVA POI project documentation is complete, NPOI is not a standard document,. NET program apes survival is really difficult
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