c# - 在 C# 中读取 Excel 文件总是导致 System.__ComObject？

Question

这是我用来读取 xls 文件的代码:

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook excelWorkbook = excelApp.Workbooks.Open(filePath, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
Microsoft.Office.Interop.Excel.Sheets excelSheets = excelWorkbook.Worksheets;
Microsoft.Office.Interop.Excel.Worksheet excelSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelSheets.get_Item(1);

MessageBox.Show(excelSheet.Cells[1,1].ToString());

这会产生一个消息框:

System.__ComObject

不确定发生了什么，非常感谢任何帮助，谢谢!

Answer 1

使用范围

Microsoft.Office.Interop.Excel.Range range =(Microsoft.Office.Interop.Excel.Range)excelSheet.Cells[1,1];
string cellValue =range.Value.ToString();