从 C# 应用程序调用 Excel 加载项方法，反之亦然答案

【问题标题】：Calling an Excel Add-In method from C# application or vice versa从 C# 应用程序调用 Excel 加载项方法，反之亦然
【发布时间】：2023-03-09 17:05:01
【问题描述】：

我在 bas 文件中有一个带有公共方法的 Excel VBA 加载项。此方法当前创建一个 VB6 COM 对象，该对象存在于正在运行的 VB6 exe/vbp 中。 VB6 应用程序加载数据，然后 Excel 加载项方法可以调用 VB6 COM 对象上的方法将数据加载到现有 Excel xls 中。这一切目前都在工作。
此后，我们将 VB6 应用程序转换为 C#。
我的问题是：用 C#/.NET 应用程序模仿这种行为的最好/最简单的方法是什么？我在想我可能无法通过加载项方法将 .NET 应用程序中的数据提取到 Excel 中，因为 .Net 应用程序需要在加载数据的情况下运行（因此不使用独立的 C# 类库） .相反，也许我们可以通过从 C# 代码访问 VBA 加载项方法，将数据从 .NET 推送到 Excel？
以下是访问VB6应用程序的现有VBA方法：

Public Sub UpdateInDataFromApp()
   Dim wkbInData As Workbook
   Dim oFPW As Object
   Dim nMaxCols As Integer
   Dim nMaxRows As Integer
   Dim j As Integer
   Dim sName As String
   Dim nCol As Integer
   Dim nRow As Integer
   Dim sheetCnt As Integer
   Dim nDepth As Integer
   Dim sPath As String
   Dim vData As Variant
   Dim SheetRange As Range

   Set wkbInData = wkbOpen("InData.xls")

   sPath = g_sPathXLSfiles & "\"

   'Note:  the following will bring up fpw app if not already running
   Set oFPW = CreateObject("FPW.CProfilesData")

   If oFPW Is Nothing Then
      MsgBox "Unable to reference " & sApp
   Else
          .
          .
          .      
      sheetCnt = wkbInData.Sheets.Count 'get number of sheets in indata workbook
      For j = 2 To sheetCnt 'set counter to loop over all sheets except the first one which is not input data fields
          With wkbInData.Worksheets(j)
             Set SheetRange = .UsedRange
          End With
          With SheetRange
             nMaxRows = .Rows.Count    'get range of sheet(j)
             nMaxCols = .Columns.Count 'get range of sheet(j)
             Range(.Cells(2, 2), .Cells(nMaxRows, nMaxCols)).ClearContents 'Clears data from data range (51 Columns)
             Range(.Cells(2, 2), .Cells(nMaxRows, nMaxCols)).ClearComments
          End With
          With oFPW 'vb6 object
             For nRow = 2 To nMaxRows ' loop through rows
                sName = SheetRange.Cells(nRow, 1) 'Field name
                vData = .vntGetSymbol(sName, 0)   'Check if vb6 app identifies the name

                nDepth = .GetInputTableDepth(sName) 'Get number of data items for this field name from vb6 app
                nMaxCols = nDepth + 2 'nDepth=0, is single data item
                For nCol = 2 To nMaxCols 'loop over deep screen fields
                   nDepth = nCol - 2     'current depth
                   vData = .vntGetSymbol(sName, nDepth) 'Get Data from vb6 app
                   If LenB(vData) > 0 And IsNumeric(vData) Then  'Check if data returned
                      SheetRange.Cells(nRow, nCol) = vData   'Poke the data in
                   Else
                      SheetRange.Cells(nRow, nCol) = vData   'Poke a zero in
                   End If

                Next 'nCol
             Next 'nRow
          End With
          Set SheetRange = Nothing
      Next 'j

  End If

  Set wkbInData = Nothing
  Set oFPW = Nothing
Exit Sub
    .
    .
    .
End Sub

任何帮助将不胜感激。

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标签： c# excel add-in