Question

我在C＃中编写一个查询WMI的函数，使用从WMI返回的对象作为不同WMI类中的方法的参数。

private void InstallUpdates()
{
    ManagementScope sc = new ManagementScope(@"\\.\root\ccm\clientsdk");
    ManagementClass c = new ManagementClass(@"CCM_SoftwareUpdatesManager");
    ManagementObjectSearcher s = new ManagementObjectSearcher("SELECT * FROM CCM_SOFTWAREUPDATE WHERE COMPLIANCESTATE=0 AND EVALUATIONSTATE < 2");
    c.Scope = s.Scope = sc;

    ManagementObjectCollection col = s.Get();
    List<ManagementObject> lUpdates = new List<ManagementObject>();

    //Install each update individually and track progress
    int index = 1;
    foreach (ManagementObject o in col)
    {


        object[] args = { o };

        object[] methodArgs = { args, null };

        lblCurrentAction.Text = "Now running method: Install Updates " + o.Properties["Name"].Value + " EvalState=" + (UInt32)o.Properties["EvaluationState"].Value;

        c.InvokeMethod("InstallUpdates",methodArgs);

        lblCurrentUpdate.Text = "Now Installing Update " + index + " of " + col.Count + ": " + o.Properties["name"].Value;

        UInt32 intProgress = (UInt32)o.Properties["PercentComplete"].Value;

        UInt32 evalState = (UInt32)o.Properties["EvaluationState"].Value;

        lblCurrentAction.Text = lblCurrentAction.Text + " EvalState: " + evalState;

        while (evalState <=  7)
        {
            progressBar1.Value = (intProgress <= 100) ? (int)intProgress : 100;
            evalState = (UInt32)o.Properties["EvaluationState"].Value;
            intProgress = (UInt32)o.Properties["PercentComplete"].Value;
            lblCurrentAction.Text = lblCurrentAction.Text + " EvalState: " + evalState;
        }

        ++index;

    }





}

我粘贴了整个函数以供参考，但问题行在foreach循环中是＃1,2和4。从文档here开始，该方法将ccm_softwareupdate对象的数组作为参数，我从一个不同的类中成功查询（并在集合上运行foreach），因此我知道对象存在。

任何，因为这些是系统更新，我想一次安装一个，至少在测试期间，但是当我将单个对象数组传递给方法时

object[] args = { o };

c.InvokeMethod("InstallUpdates", args);

我收到施法错误：

无法转换类型＆system; system.management.managementobject＆＃39;到system.array

所以在某个地方它显然只将我的数组视为一个对象。我知道它没有使用WMI方法，因为我没有看到更新开始安装。

从网上阅读，我现在也尝试了这个功能：

object[] args = { o };

object[] methodArgs = { args, null };

c.InvokeMethod("InstallUpdates", methodArgs);

这里的关键是创建一个第二个数组，该数组包含第一个数组，空值为第二个值。这实际上是有效的，并且调用了WMI方法，但它从来没有从该方法返回，代码只是挂起。切换参数

object[] methodArgs = { null, args };

显示它实际上挂在null参数上，因为此处更新永远不会开始安装。我也试过这个作为一个完整性检查

object[] args = { o, o };

c.InvokeMethod("InstallUpdates", args);

但是我得到了相同的转换错误，所以我必须使用双数组方法在正确的轨道上。另外，使用

object[] methodArgs = { args, 0};

或

object[] methodArgs = { args };

不起作用。

重申一下，我正在寻找一种使用C＃将数组传递给WMI方法的方法。

更新

这个powershell脚本做同样的事情，实际上是有效的。唯一的区别是它的初始数组有多个对象，但这不重要。

    #    '=================================================================== 
#    ' DISCLAIMER: 
#    '------------------------------------------------------------------- 
#    ' 
#    ' This sample is provided as is and is not meant for use on a  
#    ' production environment. It is provided only for illustrative  
#    ' purposes. The end user must test and modify the sample to suit  
#    ' their target environment. 
#    '  
#    ' Microsoft can make no representation concerning the content of  
#    ' this sample. Microsoft is providing this information only as a  
#    ' convenience to you. This is to inform you that Microsoft has not  
#    ' tested the sample and therefore cannot make any representations  
#    ' regarding the quality, safety, or suitability of any code or  
#    ' information found here. 
#    '  
#    '=================================================================== 

# This is a simpple get of all instances of CCM_SoftwareUpdate from root\CCM\ClientSDK 
$MissingUpdates = Get-WmiObject -Class CCM_SoftwareUpdate -Filter ComplianceState=0 -Namespace root\CCM\ClientSDK 

# The following is done to do 2 things: Get the missing updates (ComplianceState=0)  
# and take the PowerShell object and turn it into an array of WMI objects 
$MissingUpdatesReformatted = @($MissingUpdates | ForEach-Object {if($_.ComplianceState -eq 0){[WMI]$_.__PATH}}) 

# The following is the invoke of the CCM_SoftwareUpdatesManager.InstallUpdates with our found updates 
# NOTE: the command in the ArgumentList is intentional, as it flattens the Object into a System.Array for us 
# The WMI method requires it in this format. 
$InstallReturn = Invoke-WmiMethod -Class CCM_SoftwareUpdatesManager -Name InstallUpdates -ArgumentList (,$MissingUpdatesReformatted) -Namespace root\ccm\clientsdk

Answer 1

我在寻找一种C＃方式来触发CCM代理安装更新时遇到了这个问题。这就是我在生产应用程序中运行的内容。

using (var searcher = new ManagementObjectSearcher(string.Format(@"\\{0}\root\CCM\ClientSDK", strComputerName), string.Format("SELECT * FROM CCM_SoftwareUpdate WHERE Name=\"{0}\"", strUpdateName)))
foreach (var obj in searcher.Get())
    using (var mInv = new ManagementClass(string.Format(@"\\{0}\root\CCM\ClientSDK", strComputerName), "CCM_SoftwareUpdatesManager", null))
        mInv.InvokeMethod("InstallUpdates", new object[] { new ManagementBaseObject[] { obj } });

将数组传递给WMI方法的正确方法是什么？

1 个答案: