Hi Kina,
Please refer to this forum post
http://www.syncfusion.com/Support/forums/message.aspx?MessageID=27870
Thanks,
Stephen.
>Hi,
>I want to read an excel file. However, the method ExcelUtils.Open(filename) generate an excption when the excel workbook is protected. The exception message is {"\r\nParameter name: length\r\nActual value was 3." }.
>I use the Syncfusion.ExcelRW.Base dll version number 3.0.1.0. You''ll find attached an example of protected workbook (test is the password to unprotect it)
>
>Regards,
>
>Kina
>
>
protected_Book_6425.zip
>
>