C＃等效

Question

讓我知道我可以在C＃中使用這個錯誤。這是VB代碼：

If Len(sPart1) <> PART1_LENGTH Then 
    Err.Raise(vbObjectError, , "Part 1 must be " & PART1_LENGTH) 

ElseIf Not IsNumeric(sPart1) Then 
    Err.Raise(vbObjectError, , "Part 1 must be numeric") 

Answer 1

更換Err.Raise與

throw new Exception("Part 1 must be numeric"); 

Answer 2

假設你問有關語法而不是特定的類：

throw new SomeException("text"); 

Answer 3

您可以使用

throw new Exception(); 

您參考。從MSDN：Error Raising and Handling Guidelines

Answer 4

首先，讓我們把這一現代VB代碼：

If sPart1.Length <> PART1_LENGTH Then 
    Throw New ApplicationException("Part 1 must be " & PART1_LENGTH) 
ElseIf Not IsNumeric(sPart1) Then 
    Throw New ApplicationException("Part 1 must be numeric") 
End If 

那麼C＃轉換是直截了當：

int part; 
if (sPart1.Length != PART1_LENGTH) { 
    throw new ApplicationException("Part 1 must be " + PART1_LENGTH.ToString()); 
} else if (!Int32.TryParse(sPart1, out part)) { 
    throw new ApplicationException("Part 1 must be numeric") 
}