当我尝试阅读我的Excel时如何插入密码？ vb.net

Question

我尝试读取Excel，但是有密码（我知道密码）如何插入密码来读取excel。我的代码是这样的：

 Dim FileName As String = Path.GetFileName(FileUpload1.PostedFile.FileName)
            Dim Extension As String = Path.GetExtension(FileUpload1.PostedFile.FileName)
            'Dim FolderPath As String = ConfigurationManager.AppSettings("Upload")

            Dim FilePath As String = Server.MapPath("~") & "\Upload\" & FileName
            FileUpload1.SaveAs(FilePath)

            Dim existingFile = New FileInfo(FilePath)
            Dim pack As ExcelPackage = New ExcelPackage(existingFile)
            Dim workBook As ExcelWorkbook = pack.Workbook

            If workBook.Worksheets.Count > 0 Then ...

行上显示错误：

  

Dim pack As ExcelPackage = New ExcelPackage（existingFile）

错误：

  

无法打开包裹。包是一个OLE复合文档。如果这   是加密包，请提供密码