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Description

When creating Excel files with Create, specifies which file format to use.

C#
vb.net

Remarks

Starting with Excel 2007, Microsoft introduced a new file format for office documents. This new format relaxes some of the restrictions of the old file formats; for example a single worksheet can now have over a million rows instead of sixty-five thousand.

Excel files created with FileFormat.Xls can be opened in all versions of Excel. Excel files created with FileFormat.Xlsx can be opened in Excel 2007 and later, or Excel 2003 with the compatibility pack.

Examples

C#
vb.net

Values

Name

Description

Xls

Excel 2003 binary-format files, with the .xls extension.

Xlsx

Excel 2007 and 2010 xml-format files, with the .xlsx extension.

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