如何在.net中发布wmi类?
题
我已经与打算通过WMI发布的类创建了一个单独的组装。然后,我创建了一个Windows表单应用程序,该应用程序引用了组装并尝试发布该类的应用程序。当我尝试发布课程时,我会得到类型System.Management.Instrumentation.wmiproviderinstallationException的例外。例外的消息显示“类型'System.Management.Instrumentation.wmiinfraexception'的例外。我不懂这啥意思。我尝试过.Net2.0和.Net3.5(也是sp1)并得到相同的结果。
下面是我的 wmi 类,后面是我用来发布它的代码。
//Interface.cs in assembly WMI.Interface.dll
using System;
using System.Collections.Generic;
using System.Text;
[assembly: System.Management.Instrumentation.WmiConfiguration(@"root\Test",
HostingModel =
System.Management.Instrumentation.ManagementHostingModel.Decoupled)]
namespace WMI
{
[System.ComponentModel.RunInstaller(true)]
public class MyApplicationManagementInstaller :
System.Management.Instrumentation.DefaultManagementInstaller { }
[System.Management.Instrumentation.ManagementEntity(Singleton = true)]
[System.Management.Instrumentation.ManagementQualifier("Description",
Value = "Obtain processor information.")]
public class Interface
{
[System.Management.Instrumentation.ManagementBind]
public Interface()
{
}
[System.Management.Instrumentation.ManagementProbe]
[System.Management.Instrumentation.ManagementQualifier("Descriiption",
Value="The number of processors.")]
public int ProcessorCount
{
get { return Environment.ProcessorCount; }
}
}
}
//Button click in windows forms application to publish class
try
{
System.Management.Instrumentation.InstrumentationManager.Publish(new
WMI.Interface());
}
catch (System.Management.Instrumentation.InstrumentationException
exInstrumentation)
{
MessageBox.Show(exInstrumentation.ToString());
}
catch (System.Management.Instrumentation.WmiProviderInstallationException
exProvider)
{
MessageBox.Show(exProvider.ToString());
}
catch (Exception exPublish)
{
MessageBox.Show(exPublish.ToString());
}
解决方案
我使用 gacutil - installutil 来测试你的类(作为 dll)。gacutil 部分有效,但 installutil (实际上是 mofcomp)抱怨语法错误:
...
错误语法 0X80044014:类名中存在意外字符(必须是标识符)
编译器返回错误0x80044014
...
因此,我将类名称更改为“MyInterface”,installutil 部分有效,但该类没有返回任何实例。最后,我将托管模型更改为网络服务并使其正常工作。
其他提示
总而言之,这是最终有效的代码:
提供者类,在它自己的程序集中:
// the namespace used for publishing the WMI classes and object instances
[assembly: Instrumented("root/mytest")]
using System;
using System.Collections.Generic;
using System.Text;
using System.Management;
using System.Management.Instrumentation;
using System.Configuration.Install;
using System.ComponentModel;
namespace WMITest
{
[InstrumentationClass(System.Management.Instrumentation.InstrumentationType.Instance)]
//[ManagementEntity()]
//[ManagementQualifier("Description",Value = "Obtain processor information.")]
public class MyWMIInterface
{
//[System.Management.Instrumentation.ManagementBind]
public MyWMIInterface()
{
}
//[ManagementProbe]
//[ManagementQualifier("Descriiption", Value="The number of processors.")]
public int ProcessorCount
{
get { return Environment.ProcessorCount; }
}
}
/// <summary>
/// This class provides static methods to publish messages to WMI
/// </summary>
public static class InstrumentationProvider
{
/// <summary>
/// publishes a message to the WMI repository
/// </summary>
/// <param name="MessageText">the message text</param>
/// <param name="Type">the message type</param>
public static MyWMIInterface Publish()
{
// create a new message
MyWMIInterface pInterface = new MyWMIInterface();
Instrumentation.Publish(pInterface);
return pInterface;
}
/// <summary>
/// revoke a previously published message from the WMI repository
/// </summary>
/// <param name="Message">the message to revoke</param>
public static void Revoke(MyWMIInterface pInterface)
{
Instrumentation.Revoke(pInterface);
}
}
/// <summary>
/// Installer class which will publish the InfoMessage to the WMI schema
/// (the assembly attribute Instrumented defines the namespace this
/// class gets published too
/// </summary>
[RunInstaller(true)]
public class WMITestManagementInstaller :
DefaultManagementProjectInstaller
{
}
}
Windows窗体应用程序主窗体,发布提供程序类:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Management;
using System.Management.Instrumentation;
namespace WMI
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
WMITest.MyWMIInterface pIntf_m;
private void btnPublish_Click(object sender, EventArgs e)
{
try
{
pIntf_m = WMITest.InstrumentationProvider.Publish();
}
catch (ManagementException exManagement)
{
MessageBox.Show(exManagement.ToString());
}
catch (Exception exPublish)
{
MessageBox.Show(exPublish.ToString());
}
}
}
}
测试 Web 应用程序,消费者:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Management.Instrumentation;
using System.Management;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ManagementClass pWMIClass = null;
pWMIClass = new ManagementClass(@"root\interiorhealth:MyWMIInterface");
lblOutput.Text = "ClassName: " + pWMIClass.ClassPath.ClassName + "<BR/>" +
"IsClass: " + pWMIClass.ClassPath.IsClass + "<BR/>" +
"IsInstance: " + pWMIClass.ClassPath.IsInstance + "<BR/>" +
"IsSingleton: " + pWMIClass.ClassPath.IsSingleton + "<BR/>" +
"Namespace Path: " + pWMIClass.ClassPath.NamespacePath + "<BR/>" +
"Path: " + pWMIClass.ClassPath.Path + "<BR/>" +
"Relative Path: " + pWMIClass.ClassPath.RelativePath + "<BR/>" +
"Server: " + pWMIClass.ClassPath.Server + "<BR/>";
//GridView control
this.gvProperties.DataSource = pWMIClass.Properties;
this.gvProperties.DataBind();
//GridView control
this.gvSystemProperties.DataSource = pWMIClass.SystemProperties;
this.gvSystemProperties.DataBind();
//GridView control
this.gvDerivation.DataSource = pWMIClass.Derivation;
this.gvDerivation.DataBind();
//GridView control
this.gvMethods.DataSource = pWMIClass.Methods;
this.gvMethods.DataBind();
//GridView control
this.gvQualifiers.DataSource = pWMIClass.Qualifiers;
this.gvQualifiers.DataBind();
}
}
}
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