Clear 方法

清除 Err 物件的所有特性設定值。

語法

object.Clear

引數:

Object必要。一律使用 Err 物件。

備註

使用 Clear 可在處理錯誤後明確清除 Err 物件。例如,當您對 On Error Resume Next 使用遞延錯誤處理時,此為必要項目。每當執行下列任一陳述式時,BSL 都會自動呼叫 Clear 方法:

On Error Resume Next
Exit Sub
Exit Function

下列範例說明 Clear 方法的用法。

範例 1

Sub RaiseAndClearError()
    On Error Resume Next       ' Enable error handling.
    Err.Raise 6                ' Raise an overflow error.
     Output1 =  "error number here " & Err.Number     

     Err.Clear                  ' Clear the error.
    ' Check if the error is cleared.
Output2 = "error number is cleared here " & Err.Number
End Sub
'Output1: error number here 6
'Output2: error number is cleared here 0

範例 2

Sub InnerProcedure()
    On Error Resume Next
    Err.Raise 9         
    Output1 = "Raising error here " & Err.Number
    Err.Clear           
    Output2 = "Error cleared here " & Err.Number
End Sub
Sub OuterProcedure()
    On Error Resume Next
    InnerProcedure      ' Call the inner procedure.
   'OuterProcedure Completed
End Sub
Call OuterProcedure

'Output1: Raising error here 9
'Output2: Error cleared here 0