驗證C＃中的ACN（澳大利亞公司編號）

Question

如何驗證C＃中的ASIC ACN（澳大利亞公司編號）？

validation rules將隨着時間推移而變爲靜態，所以爲了簡潔起見，在此不再重複。

Answer 1

試試這個

/// <summary> 
/// http://stackoverflow.com/questions/38781957 
/// </summary> 
public bool IsValidAcn(string acn) 
{ 
    int[] weightings = {8, 7, 6, 5, 4, 3, 2, 1}; 
    var accumulatedSum = 0; 

    acn = acn?.Replace(" ", ""); // strip spaces 

    if (string.IsNullOrWhiteSpace(acn) || !Regex.IsMatch(acn, @"^\d{9}$")) 
    { 
     return false; 
    } 

    // Sum the multiplication of all the digits and weights 
    for (int i = 0; i < weightings.Length; i++) 
    { 
     accumulatedSum += Convert.ToInt32(acn.Substring(i, 1)) * weightings[i]; 
    } 

    var remainder = accumulatedSum % 10; 

    var expectedCheckDigit = (10 - remainder == 10) ? 0 : (10 - remainder); 

    var actualCheckDigit = Convert.ToInt32(acn.Substring(8, 1)); 

    return expectedCheckDigit == actualCheckDigit; 
} 

xUnit的測試，讓您的技術領導快樂......

[Theory] 
[InlineData("604475587", true)] 
[InlineData("00 258 9460", true)] 
[InlineData("604475587asdfsf", false)] 
[InlineData("444", false)] 
[InlineData(null, false)] 
public void IsValidAcn(string acn, bool expectedValidity) 
{ 
    var sut = GetSystemUnderTest(); 
    Assert.True(sut.IsValidAcn(acn) == expectedValidity); 
}