Description、HelpContext、HelpFile、NativeError、Number、Source 與 SQLState 屬性範例 (VB)

這個範例會觸發錯誤、對其設陷，並顯示所產生 Error 物件的 Description、HelpContextHelpFileNativeErrorNumber、Source 和 SQLState 屬性。

'BeginDescriptionVB  
Public Sub Main()  
  
    Dim Cnxn As ADODB.Connection  
    Dim Err As ADODB.Error  
    Dim strError As String  
  
    On Error GoTo ErrorHandler  
  
    ' Intentionally trigger an error  
    Set Cnxn = New ADODB.Connection  
    Cnxn.Open "nothing"  
  
    Set Cnxn = Nothing  
    Exit Sub  
  
ErrorHandler:  
  
    ' Enumerate Errors collection and display  
    ' properties of each Error object  
    For Each Err In Cnxn.Errors  
        strError = "Error #" & Err.Number & vbCr & _  
            "   " & Err.Description & vbCr & _  
            "   (Source: " & Err.Source & ")" & vbCr & _  
            "   (SQL State: " & Err.SQLState & ")" & vbCr & _  
            "   (NativeError: " & Err.NativeError & ")" & vbCr  
        If Err.HelpFile = "" Then  
            strError = strError & "   No Help file available"  
        Else  
            strError = strError & _  
               "   (HelpFile: " & Err.HelpFile & ")" & vbCr & _  
               "   (HelpContext: " & Err.HelpContext & ")" & _  
               vbCr & vbCr  
        End If  
  
        Debug.Print strError  
    Next  
  
    Resume Next  
End Sub  
'EndDescriptionVB  

另請參閱

Description 屬性
Error 物件
HelpContext、HelpFile 屬性
HelpContext、HelpFile 屬性
NativeError 屬性 (ADO)
Number 屬性 (ADO)
Source 屬性 (ADO Error)
SQLState 屬性