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我正在尝试为可能使用 BitLocker 连接到 Win7 及更高版本机器的每个设备构建一个循环。自从我们一直使用 TPM 以来，这在过去一直不是问题，但现在我们正在尝试使用 USB 密钥来降低成本。我的旧代码只显示了最后一个设备加密状态，它最终是 USB 驱动器。所以我想创建一个循环，列出每个驱动器及其加密状态。

我的目标是创建一个包含每个驱动器状态的阵列。我遇到的问题是确定由于 searcher.Get() 实际找到了多少项目（我认为应该是下面的 encrArr 数组），所以我现在用 2 作为硬盘驱动器和 USB 驱动器。

下面的代码在编写时没有显示任何错误，但是当我尝试运行它时它崩溃了（“调用的目标已抛出异常。”）。

public string[] getBitLockerArr()
{
    string[] encrArr = new string[2];
    encrArr[0] = "Protection Off, Fully Decrypted, 0% encrypted";
    encrArr[1] = "Protection Off, Fully Decrypted, 0% encrypted";

    ManagementObjectSearcher searcher = new
        ManagementObjectSearcher("root\\cimv2\\Security\\MicrosoftVolumeEncryption", "SELECT * FROM Win32_EncryptableVolume");    
    int i = 0;

    foreach (ManagementObject wmi in searcher.Get())
    {
        try
        {
            string[] bitLockerArr = new string[3];
            bitLockerArr[0] = "Unknown";
            bitLockerArr[1] = "Unknown";
            bitLockerArr[2] = "Unknown";

            StringBuilder bitLocker = new StringBuilder();

            ManagementObject classInstance =
                new ManagementObject("root\\cimv2\\Security\\MicrosoftVolumeEncryption", "Win32_EncryptableVolume.DeviceID='" + wmi["DeviceID"] + "'", null);

            ManagementBaseObject statProtection = classInstance.InvokeMethod("GetProtectionStatus", null, null);
            ManagementBaseObject statConversion = classInstance.InvokeMethod("GetConversionStatus", null, null);

            if (statProtection["ProtectionStatus"] != null) { bitLockerArr[0] = statProtection["ProtectionStatus"].ToString(); }
            if (statConversion["ConversionStatus"] != null) { bitLockerArr[1] = statConversion["ConversionStatus"].ToString(); }
            if (statConversion["EncryptionPercentage"] != null) { bitLockerArr[2] = statConversion["EncryptionPercentage"].ToString(); }

            // BitLocker Protection Status
            string blProtStat = bitLockerArr[0];
            if (blProtStat == "0") { blProtStat = "Protection Off"; }
            else if (blProtStat == "1") { blProtStat = "Protection On"; }

            // BitLocker Conversion Statuses
            string blConvStat = bitLockerArr[1];
            if (blConvStat == "0") { blConvStat = ", Fully Decrypted"; }
            else if (blConvStat == "1") { blConvStat = ", Fully Encrypted"; }
            else if (blConvStat == "2") { blConvStat = ", Encryption In Progress"; }
            else if (blConvStat == "3") { blConvStat = ", Decryption In Progress"; }
            else if (blConvStat == "4") { blConvStat = ", Encryption Paused"; }
            else if (blConvStat == "5") { blConvStat = ", Decryption Paused"; }

            // BitLocker Encryption Status
            string blEncStat = ", " + bitLockerArr[2] + "% encrypted";

            encrArr[i] = wmi["DriveLetter"] + " " + blProtStat + blConvStat + blEncStat + ", " + wmi["DeviceID"];
            i = i + 1;
        }
        catch { }
    }

    return encrArr;
}
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