c# - Excel.Application 异常

Question

在应用程序的主要部分，我称之为这一行:

Excel.Application ExcelApp = new Excel.Application();

它给了我一个异常(exception):

System.Runtime.InteropServices.COMException: 'Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).'

我尝试在 x86 中运行调试，x64 模式是相同的结果。

Answer 1

尝试像这样声明它们，完全合格:

Microsoft.Office.Interop.Excel.Application xlapp = new Microsoft.Office.Interop.Excel.Application();

                 Microsoft.Office.Interop.Excel.Application xlApp;
                 Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
                 Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;