当注册表项包含空格时，注册表值返回null

如何解决当注册表项包含空格时，注册表值返回null

当尝试从远程计算机中检索注册表项的值（对于在C＃中使用WMI使用空格的键）（使用WMI的原因：需要身份验证和模拟）时，GetStringValue返回null，但是当键不存在时有空间，效果很好。对字符串使用@表示法或标准“表示法都无济于事。我尝试将键括在双引号中。也无济于事。

这是我编写的代码：

public static string GetRemoteRegistryValue(string MachineName,string username,string password)
{
    string regValue = string.Empty;
    ConnectionOptions opt = new ConnectionOptions();

    opt.Impersonation = ImpersonationLevel.Impersonate;
    opt.EnablePrivileges = true;
    opt.Username = username;
    opt.Password = password;
    opt.Impersonation = ImpersonationLevel.Impersonate;
    opt.EnablePrivileges = true;
    try
    {
        ManagementPath p = new ManagementPath("\\\\" + MachineName + "\\root\\cimv2");

        ManagementScope msc = new ManagementScope(p,opt);
        msc.Connect();

        string softwareRegLoc = "\"SOFTWARE\\VMware,Inc.\\VMware Drivers\"";
        //string softwareRegLoc = @"""SOFTWARE\SAP BusinessObjects\Suite XI 4.0\Config Manager""";

        ManagementClass registry = new ManagementClass(msc,new ManagementPath("StdRegProv"),null);
        ManagementBaseObject inParams = registry.GetMethodParameters("GetStringValue");
        inParams["hDefKey"] = 0x80000002;//HKEY_LOCAL_MACHINE
        inParams["sSubKeyName"] = softwareRegLoc;
        inParams["sValueName"] = "VmciHostDevInst";

        // Read Registry Key Names 
        ManagementBaseObject outParams = registry.InvokeMethod("GetStringValue",inParams,null);
        if (outParams.Properties["sValue"].Value != null)
        {
            regValue = outParams.Properties["sValue"].Value.ToString();
        }

    }
    catch (ManagementException Ex)
    {
    }
    catch (System.UnauthorizedAccessException Ex)
    {
    }
    catch (Exception Ex)
    {
    }
    return regValue;
}

该问题的解决方案是什么？

解决方法

好的，这里有两点：

1. 您不应使用引号。因此，将"\"SOFTWARE\\VMware,Inc.\\VMware Drivers\""替换为"SOFTWARE\\VMware,Inc.\\VMware Drivers"。

2. 您尝试访问的路径属于64位提供程序。为了能够访问它（默认），您的应用程序需要将其平台目标设置为x64。否则，您的应用程序将尝试访问HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\VMware,Inc.\VMware Drivers路径，该路径可能不存在。

删除引号并定位x64对我来说效果很好，我得到了问题中提到的确切路径的价值。

如果您的平台目标设置为x86（或选中了Any CPU的{​​{1}}且您不想将其更改为Prefer 32-bit，那么您必须强制WMI访问64位注册表配置单元。检查the documentation了解更多信息。

这是一个完整的例子：

x64

当应用定位到public static string GetRemoteRegistryValue(string MachineName,string username,string password) { string regValue = string.Empty; ConnectionOptions opt = new ConnectionOptions(); opt.Impersonation = ImpersonationLevel.Impersonate; opt.EnablePrivileges = true; opt.Username = username; opt.Password = password; opt.Impersonation = ImpersonationLevel.Impersonate; opt.EnablePrivileges = true; try { ManagementPath p = new ManagementPath("\\\\" + MachineName + "\\root\\cimv2"); ManagementScope msc = new ManagementScope(p,opt); msc.Connect(); string softwareRegLoc = "SOFTWARE\\VMware,Inc.\\VMware Drivers"; ManagementClass registry = new ManagementClass(msc,new ManagementPath("StdRegProv"),null); ManagementBaseObject inParams = registry.GetMethodParameters("GetStringValue"); inParams["hDefKey"] = 0x80000002;//HKEY_LOCAL_MACHINE inParams["sSubKeyName"] = softwareRegLoc; inParams["sValueName"] = "VmciHostDevInst"; ManagementNamedValueCollection objCtx = new ManagementNamedValueCollection(); objCtx.Add("__ProviderArchitecture",64); objCtx.Add("__RequiredArchitecture",true); InvokeMethodOptions options = new InvokeMethodOptions(objCtx,TimeSpan.MaxValue); // Read Registry Key Names ManagementBaseObject outParams = registry.InvokeMethod("GetStringValue",inParams,options); if (outParams.Properties["sValue"].Value != null) { regValue = outParams.Properties["sValue"].Value.ToString(); } } catch (ManagementException Ex) { throw; } catch (System.UnauthorizedAccessException Ex) { throw; } catch (Exception Ex) { throw; } return regValue; } 时，上面的代码返回了VmciHostDevInst的值。