SelectQuery 构造函数

定义

命名空间:: System.Management

程序集:: System.Management.dll

包:: System.Management v11.0.0-preview.4.26230.115

重要

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初始化 SelectQuery 类的新实例。

重载

名称	说明
SelectQuery()	初始化 SelectQuery 类的新实例。这是无参数构造函数。
SelectQuery(String)	为指定的查询或指定的类名称初始化类的新实例 SelectQuery 。
SelectQuery(Boolean, String)	为架构查询初始化类的新实例 SelectQuery ，可以选择指定条件。
SelectQuery(String, String)	使用指定的类名称和条件初始化类的新实例 SelectQuery 。
SelectQuery(String, String, String[])	使用指定的类名称和条件初始化类的新实例 SelectQuery ，仅选择指定的属性。

SelectQuery()

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

初始化 SelectQuery 类的新实例。这是无参数构造函数。

public:
 SelectQuery();

public SelectQuery();

Public Sub New ()

注解

.NET Framework 安全性

直接调用方完全信任。此成员不能由部分受信任的代码使用。有关详细信息，请参阅使用部分受信任的代码的库。

适用于

SelectQuery(String)

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

为指定的查询或指定的类名称初始化类的新实例 SelectQuery 。

public:
 SelectQuery(System::String ^ queryOrClassName);

public SelectQuery(string queryOrClassName);

new System.Management.SelectQuery : string -> System.Management.SelectQuery

Public Sub New (queryOrClassName As String)

参数

queryOrClassName: String

要用于查询的整个查询或类名。此类中的分析程序尝试将字符串分析为有效的 WQL SELECT 查询。如果分析程序不成功，则假定字符串是类名。

示例

以下示例通过指定查询来初始化 a SelectQuery 。

using System;
using System.Management;

class Sample
{
    public static void Main(string[] args)
    {
        SelectQuery sQuery =
            new SelectQuery(
            "SELECT * FROM Win32_Service WHERE State='Stopped'");

        // or

        // This is equivalent to "SELECT * FROM Win32_Service"
        SelectQuery query = new SelectQuery("Win32_Service");
    }
}

Imports System.Management


Public Class Sample
    Public Overloads Shared Function _
        Main(ByVal args() As String) As Integer

        Dim sQuery As New SelectQuery( _
            "SELECT * FROM Win32_Service WHERE State='Stopped'")

        'or

        'This is equivalent to "SELECT * FROM Win32_Service"
        Dim query As New SelectQuery("Win32_Service")

    End Function
End Class

注解

.NET Framework 安全性

直接调用方完全信任。此成员不能由部分受信任的代码使用。有关详细信息，请参阅使用部分受信任的代码的库。

适用于

SelectQuery(Boolean, String)

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

为架构查询初始化类的新实例 SelectQuery ，可以选择指定条件。

public:
 SelectQuery(bool isSchemaQuery, System::String ^ condition);

public SelectQuery(bool isSchemaQuery, string condition);

new System.Management.SelectQuery : bool * string -> System.Management.SelectQuery

Public Sub New (isSchemaQuery As Boolean, condition As String)

参数

isSchemaQuery: Boolean

true 指示这是架构查询;否则，为 false. false此构造函数中的值无效。

condition: String

要应用于形成类的结果集的条件。

示例

以下示例通过指定条件来初始化 a SelectQuery 。

using System;
using System.Management;

public class Sample
{
    public static void Main(string[] args)
    {
        SelectQuery s =
            new SelectQuery(true,
            "__CLASS = 'Win32_Service'");

        ManagementObjectSearcher searcher =
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject service in searcher.Get())
        {
            // show the class
            Console.WriteLine(service.ToString());
        }
    }
}

Imports System.Management


Public Class Sample
    Public Overloads Shared Function _
        Main(ByVal args() As String) As Integer

        Dim s As New SelectQuery( _
            True, "__CLASS = ""Win32_Service""")

        Dim searcher As ManagementObjectSearcher
        searcher = New ManagementObjectSearcher(s)

        For Each service As ManagementObject In searcher.Get()
            'show the class
            Console.WriteLine(service.ToString())
        Next


    End Function 'Main
End Class

注解

.NET Framework 安全性

直接调用方完全信任。此成员不能由部分受信任的代码使用。有关详细信息，请参阅使用部分受信任的代码的库。

适用于

SelectQuery(String, String)

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

使用指定的类名称和条件初始化类的新实例 SelectQuery 。

public:
 SelectQuery(System::String ^ className, System::String ^ condition);

public SelectQuery(string className, string condition);

new System.Management.SelectQuery : string * string -> System.Management.SelectQuery

Public Sub New (className As String, condition As String)

参数

className: String

在查询中选择的类的名称。

condition: String

要应用于查询的条件。

示例

以下示例通过指定 WMI 类名和条件来初始化 a SelectQuery 。

using System;
using System.Management;

public class Sample
{
    public static void Main(string[] args)
    {
        SelectQuery s =
            new SelectQuery("Win32_Service",
            "State = 'Stopped'");

        ManagementObjectSearcher searcher =
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject service in searcher.Get())
        {
            // show the class
            Console.WriteLine(service.ToString());
        }
    }
}

Imports System.Management


Public Class Sample
    Public Overloads Shared Function _
        Main(ByVal args() As String) As Integer

        Dim s As New SelectQuery("Win32_Service", _
            "State = 'Stopped'")

        Dim searcher As ManagementObjectSearcher
        searcher = New ManagementObjectSearcher(s)

        For Each service As ManagementObject In searcher.Get()
            'show the class
            Console.WriteLine(service.ToString())
        Next


    End Function 'Main
End Class

注解

.NET Framework 安全性

直接调用方完全信任。此成员不能由部分受信任的代码使用。有关详细信息，请参阅使用部分受信任的代码的库。

适用于

SelectQuery(String, String, String[])

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

Source:: ManagementQuery.cs

使用指定的类名称和条件初始化类的新实例 SelectQuery ，仅选择指定的属性。

public:
 SelectQuery(System::String ^ className, System::String ^ condition, cli::array <System::String ^> ^ selectedProperties);

public SelectQuery(string className, string condition, string[] selectedProperties);

new System.Management.SelectQuery : string * string * string[] -> System.Management.SelectQuery

Public Sub New (className As String, condition As String, selectedProperties As String())

参数

className: String

要从中选择的类的名称。

condition: String

要应用于所选类实例的条件。

selectedProperties: String[]

要返回在查询结果中的属性名称数组。

示例

以下示例通过指定 WMI 类名、条件和属性数组来初始化 a SelectQuery 。

using System;
using System.Management;

public class Sample
{
    public static void Main(string[] args)
    {
        String[] properties =
            {"Name", "Handle"};

        SelectQuery s = new SelectQuery("Win32_Process",
            "Name = 'notepad.exe'",
            properties);

        ManagementObjectSearcher searcher =
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject o in searcher.Get())
        {
            // show the class
            Console.WriteLine(o.ToString());
        }
    }
}

Imports System.Management


Public Class Sample
    Public Overloads Shared Function _
        Main(ByVal args() As String) As Integer

        Dim properties() As String = _
            {"Name", "Handle"}

        Dim s As New SelectQuery("Win32_Process", _
            "Name = 'notepad.exe'", _
            properties)

        Dim searcher As ManagementObjectSearcher
        searcher = New ManagementObjectSearcher(s)

        For Each o As ManagementObject In searcher.Get()
            'show the class
            Console.WriteLine(o.ToString())
        Next


    End Function 'Main
End Class

注解

.NET Framework 安全性

直接调用方完全信任。此成员不能由部分受信任的代码使用。有关详细信息，请参阅使用部分受信任的代码的库。

适用于

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