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以编程方式访问 WMI 提供程序

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WMI 提供程序概述

用于在本文所示代码示例中获取 Reporting Services 相关信息的命名空间是在 Microsoft .NET Framework 中找到的 System.Management 命名空间。 System.Management 命名空间提供一组托管代码类，.NET Framework 应用程序可通过这些类访问和操作管理信息。 有关将 Reporting Services WMI 类与 System.Management 命名空间配合使用的详细信息，请参阅 Microsoft .NET Framework SDK 中的“使用 System.Management 的访问管理信息”。

查找报表服务器实例

查找与您的报表服务器安装有关的信息的首选方式是枚举 WMI 实例集合。 以下示例演示如何通过创建集合并循环访问集合来显示属性来查找每个报表服务器实例上的属性。

Imports System  
Imports System.Management  
Imports System.IO  
  
Module Module1  
    Sub Main()  
        Const WmiNamespace As String = "\\<ServerName>\root\Microsoft\SqlServer\ReportServer\<InstanceName>\v10\Admin"  
        Const WmiRSClass As String = _  
           "\\<ServerName>\root\Microsoft\SqlServer\ReportServer\<InstanceName>\v13\admin:MSReportServer_ConfigurationSetting"  
  
        Dim serverClass As ManagementClass  
        Dim scope As ManagementScope  
        scope = New ManagementScope(WmiNamespace)  
        'Connect to the Reporting Services namespace.  
        scope.Connect()  
  
        'Create the server class.  
        serverClass = New ManagementClass(WmiRSClass)  
        'Connect to the management object.  
        serverClass.Get()  
        If serverClass Is Nothing Then Throw New Exception("No class found")  
  
        'Loop through the instances of the server class.  
        Dim instances As ManagementObjectCollection = serverClass.GetInstances()  
        Dim instance As ManagementObject  
        For Each instance In instances  
            Console.Out.WriteLine("Instance Detected")  
            Dim instProps As PropertyDataCollection = instance.Properties  
            Dim prop As PropertyData  
            For Each prop In instProps  
                Dim name As String = prop.Name  
                Dim val As Object = prop.Value  
                Console.Out.Write("Property Name: " + name)  
                If val Is Nothing Then  
                    Console.Out.WriteLine("     Value: <null>")  
                Else  
                    Console.Out.WriteLine("     Value: " + val.ToString())  
                End If  
            Next  
        Next  
  
        Console.WriteLine("--- Press any key ---")  
        Console.ReadKey()  
  
    End Sub  
End Module  

using System;  
using System.Management;  
using System.IO;  
[assembly: CLSCompliant(true)]  
  
class Class1  
{  
    [STAThread]  
    static void Main(string[] args)  
    {  
        const string WmiNamespace = @"\\<ServerName>\root\Microsoft\SqlServer\ReportServer\<InstanceName>\v10\Admin";  
        const string WmiRSClass =  
          @"\\<ServerName>\root\Microsoft\SqlServer\ReportServer\<InstanceName>\v13\admin:MSReportServer_ConfigurationSetting";  
        ManagementClass serverClass;  
        ManagementScope scope;  
        scope = new ManagementScope(WmiNamespace);  
  
        // Connect to the Reporting Services namespace.  
        scope.Connect();  
        // Create the server class.  
        serverClass = new ManagementClass(WmiRSClass);  
        // Connect to the management object.  
        serverClass.Get();  
        if (serverClass == null)  
            throw new Exception("No class found");  
  
        // Loop through the instances of the server class.  
        ManagementObjectCollection instances = serverClass.GetInstances();  
  
        foreach (ManagementObject instance in instances)  
        {  
            Console.Out.WriteLine("Instance Detected");  
            PropertyDataCollection instProps = instance.Properties;  
            foreach (PropertyData prop in instProps)  
            {  
                string name = prop.Name;  
                object val = prop.Value;  
                Console.Out.Write("Property Name: " + name);  
                if (val != null)  
                    Console.Out.WriteLine("     Value: " + val.ToString());  
                else  
                    Console.Out.WriteLine("     Value: <null>");  
            }  
        }  
        Console.WriteLine("\n--- Press any key ---");  
        Console.ReadKey();  
    }  
}

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