使用C#访问Windows 7引导配置数据

Question

我需要能够使用c#从引导配置数据存储中访问当前运行的Windows安装程序的标识符GUID.它可以从运行的命令行返回:

bcdedit /enum {current} /v

我遇到的问题是在c#中,如果我尝试直接运行此命令(即使程序以管理员身份运行),我被告知bcdedit不存在.我正在使用:

ProcessStartInfo procStartInfo = new ProcessStartInfo("bcdedit.exe", "/enum {current} /v");

我研究的另一件事是使用WMI,但我必须这样做的唯一参考是http://msdn.microsoft.com/en-us/library/windows/desktop/aa362673(v=vs.85).aspx这不是很有帮助.

最好的解决方案是,如果我不必使用bcdedit,而是可以使用本机WMI类.如何使用C#找到当前的Windows Boot Loader标识符？

Answer 1

直接访问bcdedit.exe似乎有很多问题,但我能够弄清楚如何在C#中使用WMI来访问BcdStore:

ConnectionOptions connectionOptions = new ConnectionOptions();
connectionOptions.Impersonation = ImpersonationLevel.Impersonate;
connectionOptions.EnablePrivileges = true;

// The ManagementScope is used to access the WMI info as Administrator
ManagementScope managementScope = new ManagementScope(@"root\WMI", connectionOptions);

// {9dea862c-5cdd-4e70-acc1-f32b344d4795} is the GUID of the System BcdStore
ManagementObject privateLateBoundObject = new ManagementObject(managementScope, new ManagementPath("root\\WMI:BcdObject.Id=\"{9dea862c-5cdd-4e70-acc1-f32b344d4795}\",StoreFilePath=\"\""), null);

ManagementBaseObject inParams = null;
inParams = privateLateBoundObject.GetMethodParameters("GetElement");

// 0x24000001 is a BCD constant: BcdBootMgrObjectList_DisplayOrder
inParams["Type"] = ((UInt32)0x24000001);
ManagementBaseObject outParams = privateLateBoundObject.InvokeMethod("GetElement", inParams, null);
ManagementBaseObject mboOut = ((ManagementBaseObject)(outParams.Properties["Element"].Value));

string[] osIdList = (string[]) mboOut.GetPropertyValue("Ids");

// Each osGuid is the GUID of one Boot Manager in the BcdStore
foreach (string osGuid in osIdList)
{
    ManagementObject currentManObj = new ManagementObject(managementScope, new ManagementPath("root\\WMI:BcdObject.Id=\"" + osGuid + "\",StoreFilePath=\"\""), null);
            MessageBox.Show("" + currentManObj.GetPropertyValue("Id"));
}

这将获取BcdStore中每个Windows启动管理器的GUID,并在MessageBox中显示它们.应该注意,您必须拥有正确的ConnectionOptions,并且该程序必须以管理员身份运行.

感谢Ross Johnston的项目:http://www.codeproject.com/script/Articles/ViewDownloads.aspx？ aid = 18233,找到BCD常数和Tran Dinh Hop的项目:http:// www .codeproject.com/script/Articles/ViewDownloads.aspx？aid = 19208,其中包含与BcdStore一起使用的所有C#代码(上述常量除外).

更新:

使用:

ManagementObject privateLateBoundObject = new ManagementObject(managementScope, new ManagementPath("root\\WMI:BcdObject.Id=\"{fa926493-6f1c-4193-a414-58f0b2456d1e}\",StoreFilePath=\"\""), null);

将获取当前运行Windows启动管理器的BcdObject.如果你然后打电话:

currentManObj.GetPropertyValue("Id")

您将获得当前运行的Windows启动管理器的GUID,该启动管理器与"{fa926493-6f1c-4193-a414-58f0b2456d1e}"不同,后者是指向当前启动管理器的链接.

感谢Microsoft Scripting Guys及其项目:http://technet.microsoft.com/en-us/magazine/2008.07.heyscriptingguy.aspx？pr = blog,以获得链接到当前Boot Manager的GUID常量.

Answer 2

请注意,%systemroot%\ system32中只有64位bcdedit.exe.如果您的应用程序是32位,它将无法启动64位bcdedit,因为WOW64层将system32 \目录重新映射到syswow64.绝对最好使用WMI界面.