PowerShell C# WMI 为 InvokeMethod 正确填充输入对象

Question

我在将 PowerShell 脚本转换为 C# 时遇到问题。

我正在关注 Exploring NDIS WMI classes 文章，我正在尝试将示例 PowerShell 重写为 C#。更准确地说，我在将 Get-NdisObjectHeader、Get-NdisWmiHeader 正确转换为 inParams 时遇到了问题。首先是 PS 代码，然后是我在 C# 中的失败代码。

PowerShell：

$Adapters =  Get-WmiObject -Namespace root\wmi -Class` MSNdis_ReceiveScaleCapabilities;

## $Adapters[4];
## under 4.element I’ve got my desired adapter InstanceName: „Adapter 0”

function Get-NdisObjectHeader 
{ 
    param( 
        $revision = 1, 
        $type     = 0x02, 
        $size     = 0xffff 
    ) 
    $hdr = ([wmiclass]'root\wmi:MSNdis_ObjectHeader').CreateInstance() 
    $hdr.Revision      = $revision 
    $hdr.Type          = $type 
    $hdr.Size          = $size 
    return $hdr 
}

function Get-NdisWmiHeader 
{ 
    param($timeout = 5) 
    $whdr = ([wmiclass]'root\wmi:MSNdis_WmiMethodHeader').CreateInstance() 
    $whdr.Header       = Get-NdisObjectHeader 
    $whdr.PortNumber   = 0 
    $whdr.NetLuid      = 0 
    $whdr.Padding      = 0 
    $whdr.RequestId    = 0 
    $whdr.Timeout      = $timeout 
    return $whdr 
}

$whdr = Get-NdisWmiHeader;
$outParams = $Adapters[4].WmiQueryReceiveScaleCapabilities($whdr);

C#

static void Main(string[] args)
{
    String AdapterName = "Adapter 0";
    String WMIClassName = "MSNdis_ReceiveScaleCapabilities";
    string Query = "SELECT * FROM " + WMIClassName;
    var ListAdapterInstances = new ManagementObjectSearcher("root\WMI", Query).Get();

    foreach (ManagementObject AdapterInstance in ListAdapterInstances)
    {
        String AdapterInstanceName;
        AdapterInstanceName = (String)AdapterInstance.GetPropertyValue("InstanceName");

        if (AdapterInstanceName.Contains(AdapterName))
        {
            ManagementBaseObject whdr= AdapterInstance.GetMethodParameters("WmiQueryReceiveScaleCapabilities");

            //here , I don't know how to fill correctly whdr object with NDISWmiHeader(->NDISObjectHeader).. 
            object[] NDISObjectHeader = { 1, 0x02, 0xffff };    //Get-NdisObjectHeader 
            object[] NDISWmiHeader = { NDISObjectHeader, 0, 0, 0, 0, 5 };   //Get-NdisWmiHeader

            whdr["Header"] = NDISWmiHeader;

            ManagementBaseObject outParams = AdapterInstance.InvokeMethod("WmiQueryReceiveScaleCapabilities", whdr, null);
            //
        }
    }
}

感谢您的帮助。鲍勃

Answer 1

您的 PowerShell 代码可以翻译为：

ManagementBaseObject hdr = new ManagementClass("root\wmi:MSNdis_ObjectHeader").CreateInstance();

hdr["Revision"] = 1;
hdr["Type"] = 0x02;
hdr["Size"] = 0xffff;

ManagementBaseObject whdr = new ManagementClass("root\wmi:MSNdis_WmiMethodHeader").CreateInstance();

whdr["Header"] = hdr;
whdr["PortNumber"] = 0;
whdr["NetLuid"] = 0;
whdr["Padding"] = 0;
whdr["RequestId"] = 0;
whdr["Timeout"] = 5;

// Two lines bellow are taken from Bob's answer
ManagementBaseObject inParams = AdapterInstance.GetMethodParameters("WmiQueryReceiveScaleCapabilities");

inParams["Header"] = whdr;

ManagementBaseObject outParams = AdapterInstance.InvokeMethod("WmiQueryReceiveScaleCapabilities", inParams, null);

编辑： 必须通过 ManagementClass.GetMethodParameters 创建 ManagementBaseObject 类型的实例以存储参数。而这个ManagementBaseObject必须传给InvokeMethod。在 PowerShell 中，这是在您调用方法时由 ManagementObjectAdapter 隐式完成的。

@bob0123 发现了我的错误。所以也为他的回答点赞。

Answer 2

对于完整的代码，我在 Yoh Deadfall 版本中添加了两行（感谢提示！）：

ManagementBaseObject hdr = new ManagementClass("root\wmi:MSNdis_ObjectHeader").CreateInstance();
                    hdr["Revision"] = 1;
                    hdr["Type"] = 0x02;
                    hdr["Size"] = 0xffff;

ManagementBaseObject whdr = new ManagementClass("root\wmi:MSNdis_WmiMethodHeader").CreateInstance();
                    whdr["Header"] = hdr;
                    whdr["PortNumber"] = 0;
                    whdr["NetLuid"] = 0;
                    whdr["Padding"] = 0;
                    whdr["RequestId"] = 0;
                    whdr["Timeout"] = 5;

ManagementBaseObject inParams =  AdapterInstance.GetMethodParameters("WmiQueryReceiveScaleCapabilities");
inParams["Header"] = whdr;

ManagementBaseObject outParams = AdapterInstance.InvokeMethod("WmiQueryReceiveScaleCapabilities", inParams, null);

PowerShell C# WMI 为 InvokeMethod 正确填充输入对象

PowerShell C# WMI correct filling input object for InvokeMethod

c#

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wmi

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