檢閱建立及擲回例外狀況挑戰的解決方案

已完成

下列程式代碼是上一個單元中挑戰的可能解決方案：

string[][] userEnteredValues = new string[][]
{
            new string[] { "1", "2", "3"},
            new string[] { "1", "two", "3"},
            new string[] { "0", "1", "2"}
};

try
{
    Workflow1(userEnteredValues);
    Console.WriteLine("'Workflow1' completed successfully.");

}
catch (DivideByZeroException ex)
{
    Console.WriteLine("An error occurred during 'Workflow1'.");
    Console.WriteLine(ex.Message);
}

static void Workflow1(string[][] userEnteredValues)
{
    foreach (string[] userEntries in userEnteredValues)
    {
        try
        {
            Process1(userEntries);
            Console.WriteLine("'Process1' completed successfully.");
            Console.WriteLine();
        }
        catch (FormatException ex)
        {
            Console.WriteLine("'Process1' encountered an issue, process aborted.");
            Console.WriteLine(ex.Message);
            Console.WriteLine();
        }
    }
}

static void Process1(String[] userEntries)
{
    int valueEntered;

    foreach (string userValue in userEntries)
    {
        bool integerFormat = int.TryParse(userValue, out valueEntered);

        if (integerFormat == true)
        {
            if (valueEntered != 0)
            {
                checked
                {
                    int calculatedValue = 4 / valueEntered;
                }
            }
            else
            {
                throw new DivideByZeroException("Invalid data. User input values must be non-zero values.");
            }
        }
        else
        {
            throw new FormatException("Invalid data. User input values must be valid integers.");
        }
    }
}

執行此應用程式會產生所需的輸出：

'Process1' completed successfully.

'Process1' encountered an issue, process aborted.
Invalid data. User input values must be valid integers.

An error occurred during 'Workflow1'.
Invalid data. User input values must be non-zero values.

此程序代碼只是「一個可能的解決方案」，因為有許多方式可以建立和擲回例外狀況。 只要您在挑戰中根據規則取得正確的結果，您就做得很棒！

如果您已成功，恭喜！ 繼續進行下一個單元中的知識檢定。

這很重要

如果您無法順利完成此挑戰，您應該在繼續之前先複習上一個單元中的內容。