Msvm_VirtualSystemManagementService 类的 RemoveKvpItems 方法

项目
06/12/2023

从虚拟机中删除现有的键值对。

语法

uint32 RemoveKvpItems(
  [in]  CIM_ComputerSystem REF TargetSystem,
  [in]  string                 DataItems[],
  [out] CIM_ConcreteJob    REF Job
);

参数

TargetSystem [in]

类型： CIM_ComputerSystem

对要删除其键值对的虚拟机的引用。

DataItems [in]

类型： string[]

要删除的键值对数组， (键只需要匹配) 。数组的每个元素都是 Msvm_KvpExchangeDataItem 类的嵌入实例。如果目标系统上不存在任何指定的键值对，此方法将失败。此数组最多可以包含 128 个元素。

作业 [out]

类型： CIM_ConcreteJob

如果异步执行操作，此方法将返回 4096，此参数将包含对派生自 CIM_ConcreteJob 的对象的引用。

返回值

类型： uint32

此方法返回以下值之一。

已完成，无错误 (0)
已检查方法参数 - 作业 启动 (4096)
(32768) 失败
访问被拒绝 (32769)
不支持 (32770)
状态未知 (32771)
超时 (32772)
参数 (32773) 无效
系统正在使用 (32774)
此操作的无效状态 (32775)
数据类型 (32776) 不正确
系统 (32777) 不可用
内存不足 (32778)

备注

UAC 筛选可能会限制对 Msvm_VirtualSystemManagementService 类的访问。有关详细信息，请参阅用户帐户控制和 WMI。

示例

以下 C# 示例从虚拟机中删除键值对。可以在虚拟化示例的常见实用工具中找到引用的实用工具， (V2) 。

重要

若要正常运行，必须在虚拟机主机服务器上运行以下代码，并且必须使用管理员权限运行。

public static void RemoveKvpItems(string vmName, string itemName)
{
    ManagementScope scope = new ManagementScope(@"root\virtualization\v2", null);
    ManagementObject virtualSystemService = Utility.GetServiceObject(scope, "Msvm_VirtualSystemManagementService");
    ManagementBaseObject inParams = virtualSystemService.GetMethodParameters("RemoveKvpItems");
    ManagementClass kvpExchangeDataItem = new ManagementClass(scope, new ManagementPath("Msvm_KvpExchangeDataItem"), null);

    ManagementObject dataItem = kvpExchangeDataItem.CreateInstance();

    dataItem["Data"] = "";
    dataItem["Name"] = itemName;
    dataItem["Source"] = 0;

    string[] dataItems = new string[1];
    dataItems[0] = dataItem.GetText(TextFormat.CimDtd20);

    ManagementObject vm = Utility.GetTargetComputer(vmName, scope);
    inParams["TargetSystem"] = vm.Path.Path;
    inParams["DataItems"] = dataItems;

    ManagementBaseObject outParams = virtualSystemService.InvokeMethod("RemoveKvpItems", inParams, null);

    if ((UInt32)outParams["ReturnValue"] == ReturnCode.Started)
    {
        if (Utility.JobCompleted(outParams, scope))
        {
            Console.WriteLine("KvpItems were removed successfully.");

        }
        else
        {
            Console.WriteLine("Failed to remove KvpItems");
        }
    } 
    else if ((UInt32)outParams["ReturnValue"] == ReturnCode.Completed)
    {
        Console.WriteLine("KvpItems were removed successfully.");
    }
    else
    {
        Console.WriteLine("Remove KvpItems failed with error {0}", outParams["ReturnValue"]);
    }

    inParams.Dispose();
    outParams.Dispose();
    dataItem.Dispose();
    vm.Dispose();
    virtualSystemService.Dispose();
    
}

以下 Visual Basic Scripting Edition (VBScript) 示例从虚拟机中删除键值对。

重要

若要正常运行，必须在虚拟机主机服务器上运行以下代码，并且必须使用管理员权限运行。

option explicit 

dim objWMIService
dim managementService
dim fileSystem


const JobStarting = 3
const JobRunning = 4
const JobCompleted = 7
const wmiStarted = 4096
const wmiSuccessful = 0

Main()

'-----------------------------------------------------------------
' Main
'-----------------------------------------------------------------
Sub Main()

    dim computer, vmName, itemName, myVm, objArgs
    
    set fileSystem = Wscript.CreateObject("Scripting.FileSystemObject")

    computer = "."

    set objWMIService = GetObject("winmgmts:\\" & computer & "\root\virtualization\v2")
    set managementService = objWMIService.ExecQuery("select * from Msvm_VirtualSystemManagementService").ItemIndex(0)

    set objArgs = WScript.Arguments
    if WScript.Arguments.Count = 3 then
        vmName = objArgs.Unnamed.Item(0)
        itemName = objArgs.Unnamed.Item(1)
    else
        WScript.Echo "usage: cscript AddKvpItems.vbs vmName itemName"
        WScript.Quit(1)
    end if

    set myVm = GetComputerSystem(vmName)

    if RemoveKvpItems(myVm, itemName) then

        WriteLog "Done"
        WScript.Quit(0)

    else
        WriteLog "RemoveKvpItems failed"
        WScript.Quit(1)
    end if
End Sub

'-----------------------------------------------------------------
' Retrieve Msvm_VirtualComputerSystem from base on its ElementName
'-----------------------------------------------------------------
Function GetComputerSystem(vmElementName)
    On Error Resume Next
    dim query
    query = Format1("select * from Msvm_ComputerSystem where ElementName = '{0}'", vmElementName)
    set GetComputerSystem = objWMIService.ExecQuery(query).ItemIndex(0)
    if (Err.Number <> 0) then
        WriteLog Format1("Err.Number: {0}", Err.Number)
        WriteLog Format1("Err.Description:{0}",Err.Description)
        WScript.Quit(1)
    end if
End Function

'-----------------------------------------------------------------
' RemoveKvpItems
'-----------------------------------------------------------------
Function RemoveKvpItems(computerSystem, itemName)

    dim dataItem, dataItems, objInParam, objOutParams
    
    RemoveKvpItems = false
    
    set dataItem = objWMIService.Get("Msvm_KvpExchangeDataItem").SpawnInstance_()
    dataItem.Data = ""
    dataItem.Name = itemName
    dataItem.Source = 0
    
    dataItems = Array(1)
    dataItems(0) = dataItem.GetText_(1)
    
    set objInParam = managementService.Methods_("RemoveKvpItems").InParameters.SpawnInstance_()
    objInParam.TargetSystem = computerSystem.Path_.Path
    objInParam.dataItems = dataItems
    
    set objOutParams = managementService.ExecMethod_("RemoveKvpItems", objInParam)

    if objOutParams.ReturnValue = wmiStarted then
        if (WMIJobCompleted(objOutParams)) then
            RemoveKvpItems = true
        end if
    elseif objOutParams.ReturnValue = wmiSuccessful then
        RemoveKvpItems = true
    else
        WriteLog Format1("RemoveKvpItems failed with {0}", objOutParams.ReturnValue )
    end if

End Function

'-----------------------------------------------------------------
' Handle wmi Job object
'-----------------------------------------------------------------
Function WMIJobCompleted(outParam)

    dim WMIJob, jobState
    WMIJobCompleted = true

    set WMIJob = objWMIService.Get(outParam.Job)
    
    jobState = WMIJob.JobState

    while jobState = JobRunning or jobState = JobStarting
        WriteLog Format1("In progress... {0}% completed.",WMIJob.PercentComplete)
        WScript.Sleep(1000)
        set WMIJob = objWMIService.Get(outParam.Job)
        jobState = WMIJob.JobState
    wend

    if (WMIJob.JobState <> JobCompleted) then
        WriteLog Format1("ErrorDescription:{0}", WMIJob.ErrorDescription)
        WriteLog Format1("ErrorCode:{0}", WMIJob.ErrorCode)
        WMIJobCompleted = false
    end if

End Function

'-----------------------------------------------------------------
' Create the console log files.
'-----------------------------------------------------------------
Sub WriteLog(line)
    dim fileStream
    set fileStream = fileSystem.OpenTextFile(".\RemoveKvpItems.log", 8, true)
    WScript.Echo line
    fileStream.WriteLine line
    fileStream.Close

End Sub

'------------------------------------------------------------------------------
' The string formatting functions to avoid string concatenation.
'------------------------------------------------------------------------------
Function Format1(myString, arg0)
    Format1 = Replace(myString, "{0}", arg0)
End Function

要求

要求	值
最低受支持的客户端	Windows 8 [仅限桌面应用]
最低受支持的服务器	Windows Server 2012 [仅限桌面应用]
命名空间	Root\Virtualization\V2
MOF	WindowsVirtualization.V2.mof
DLL	Vmms.exe

另请参阅

Msvm_VirtualSystemManagementService

Msvm_VirtualSystemManagementService 类的 RemoveKvpItems 方法

语法

参数

返回值

备注

示例

要求

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