这是我在 vb.net 上的第一个项目,我现在正在努力将 vba 工作插件迁移到 vb.net COM 插件。我想我有点明白了,但错误处理让我受阻。
这是我一直用来了解 try-catch 以及如何将异常传递给调用者的测试
Public Sub test()
Dim ActWkSh As Excel.Worksheet
Dim ActRng As Excel.Range
Dim ActCll As Excel.Range
Dim sVar01 As String
Dim iVar01 As Integer
Dim sVar02 As String
Dim iVar02 As Integer
Dim objVar01 As Object
ActWkSh = Me.Application.ActiveSheet
ActRng = Me.Application.Selection
ActCll = Me.Application.ActiveCell
iVar01 = iVar02 = 1
sVar01 = CStr(ActCll.Value)
sVar02 = CStr(ActCll.Offset(1, 0).Value)
Try
objVar01 = GetValuesV(sVar01, sVar02)
'DO SOMETHING HERE
Catch ex As Exception
MsgBox("ERROR: " + ex.Message)
'LOG ERROR SOMEWHERE
Finally
MsgBox("DONE!")
End Try
End Sub
Private Function GetValuesV(ByVal QryStr As Object, ByVal qryConn As String) As Object
Dim cnn As Object
Dim rs As Object
Try
cnn = CreateObject("ADODB.Connection")
cnn.Open(qryConn)
rs = CreateObject("ADODB.recordset")
rs = cnn.Execute(QryStr)
If rs.EOF = False Then
GetValuesV = rs.GetRows
Else
Throw New System.Exception("Query Return Empty Set")
End If
Catch ex As Exception
Throw ex
Finally
rs.Close()
cnn.Close()
End Try
End Function
我想测试错误消息,但是 MsgBox("ERRORE: " + ex.Message) 弹出一些意外的东西(对象变量或未设置块变量)我在这里做错了什么?感谢:D