Question

我正在尝试使用Office Developer Tools通过Visual Studio与Excel通信，但似乎无法将System._comobject对象强制转换为Microsoft.Office.Tools.Excel类型：

Private Sub ThisAddIn_Startup() Handles Me.Startup
    Me.Application.Workbooks.Add()
    Me.Application.Worksheets.Add()
    Dim sheet2 = Me.Application.Worksheets.Item(1)
    Dim cell = sheet2.range("A2")
    cell.Value = sheet2.GetType.ToString()
    Dim tmpSheet As Microsoft.Office.Tools.Excel.Worksheet = Me.Application.Worksheets.Item(1)
End Sub

当我运行此代码时，单元格A2包含＆＃34; System._ComObject＆＃34;但是在将其转换为Worksheet类型时会出现异常。例外是：

Unable to cast COM object of type 'System.__ComObject' to interface
type 'Microsoft.Office.Tools.Excel.Worksheet'. This operation failed
because the QueryInterface call on the COM component for the interface with
IID '{297DC8D9-EABD-45A1-BDEF-68AB67E5C3C3}' failed due to the following
error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

我知道这通常是因为不正确的注册码，例如： unable to cast COM object of type 'microsoft.Office.Interop.Excel.ApplicationClass' to 'microsoft.Office.Interop.Excel.Application'"

但是我只有一个注册密钥，删除它，办公室本身把它放回原处，所以我猜它是正确的。

有谁知道如何解决这个问题？我使用Visual Studio 2015和office 2013 Standard，英文版。提前谢谢！

Answer 1

显然我需要使用类型：

Microsoft.Office.Interop.Excel.Worksheet

而不是

Microsoft.Office.Tools.Excel.Worksheet

Office Developer工具：无法将System._Comobject转换为excel类型

1 个答案: