power shell通过epplus操作excel

[void][Reflection.assembly]::LoadFrom(C:\ww\EPPlus.dll) [void][Reflection.assembly]::LoadFrom(C:\ww\Microsoft.IO.RecyclableMemoryStream.dll)   $ex = New-Object OfficeOpenXml.ExcelPackage(C:\ww\x.xlsx)  #$ex.SaveAs(C:\ww\x1.xlsx) [System.Windows.Forms.MessageBox]::Show(($ex.Workbook.Worksheets[3].Cells[4,4]).ToString()) [System.Windows.Forms.MessageBox]::Show($ex.Workbook.Worksheets[3].Name)