页面表格导出报错

olookok

各位大佬，我在页面上设置了导出按钮，导出页面上唯一的一个表格，结果报错，报错信息如下，麻烦帮忙看看是什么原因，如何解决。

在执行导出操作时，未知的异常出现。请再次尝试。{ "StackTrace": " at GrapeCity.Documents.Excel.k3.a(cz A_0) at GrapeCity.Documents.Excel.k3.a(String A_0, hx A_1, ig A_2, Boolean A_3, Boolean A_4, Boolean A_5, Boolean A_6, String& A_7, String& A_8, Boolean A_9, Boolean A_10, Boolean A_11, IFormulaResolver A_12) at GrapeCity.Documents.Excel.k3.o6(String A_0, hx A_1, ig A_2, Boolean A_3, Boolean A_4, Boolean A_5, Boolean A_6, String& A_7, String& A_8) at GrapeCity.Documents.Excel.jm.a(IEnumerable`1 A_0, String A_1, Boolean A_2, Boolean A_3, String& A_4, String& A_5) at GrapeCity.Documents.Excel.afq.apc(IEnumerable`1 A_0, String A_1, Boolean A_2, Boolean A_3) at GrapeCity.Documents.Excel.Core.Table.d.j(Int32 A_0, TotalsRowFunctionType A_1) at GrapeCity.Documents.Excel.Core.Table.f.j(TotalsRowFunctionType A_0) at GrapeCity.Documents.Excel.TableColumn.set_TotalsCalculation(TotalsCalculation value) at Forguncy.Server2.Controllers.Export.af.a(ITable A_0) at Forguncy.Server2.Controllers.Export.af.c() at Forguncy.Server2.Controllers.Export.af.b(FormulaContext A_0) at Forguncy.Server2.Controllers.a.a(String A_0, List`1 A_1) at Forguncy.Server2.Controllers.HomeController.a(Object A_0)", "Message": "Exception of type 'GrapeCity.Documents.Excel.InvalidFormulaException' was thrown.", "Data": { "$type": "System.Collections.ListDictionaryInternal, System.Private.CoreLib" }, "InnerException": null, "HelpLink": null, "Source": "GrapeCity.Documents.Excel", "HResult": -2146233088}CurrentMethodName: ExportToExcelThread