ManagementObject.Get 方法

定義

命名空間:

System.Management

組件:

System.Management.dll

套件:

System.Management v8.0.0

繫結至管理物件。

多載

Get()	將 WMI 類別資訊繫結至管理物件。
Get(ManagementOperationObserver)	非同步繫結至管理物件。

備註

.NET Framework 安全性

完全信任立即呼叫者。 這個成員無法供部分信任的程式碼使用。 如需詳細資訊，請參閱 使用部分信任程式碼的程式庫。

Get()

來源:

ManagementObject.cs

將 WMI 類別資訊繫結至管理物件。

public:
 void Get();

public void Get ();

member this.Get : unit -> unit

Public Sub Get ()

範例

下列範例會 Get 呼叫 方法來取得 類別的 ManagementObject 實例。

using System;
using System.Management;

class Sample
{
    public static int Main(string[] args)
    {
        ManagementObject o =
            new ManagementObject("MyClass.Name='abc'");

        //this causes an implicit Get().
        string s = o["Name"].ToString();

        Console.WriteLine(s);

        //or :

        ManagementObject mObj =
            new ManagementObject("MyClass.Name= 'abc'");
        mObj.Get(); //explicitly
        // Now it is faster because the object
        // has already been retrieved.
        string property = mObj["Name"].ToString();

        Console.WriteLine(property);

        return 0;
    }
}

Imports System.Management

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

        Dim o As New ManagementObject( _
            "MyClass.Name=""abc""")

        'this causes an implicit Get().
        Dim s As String = o("SomeProperty")

        Console.WriteLine(s)

        'or :

        Dim mObj As New ManagementObject("MyClass.Name= ""abc""")
        mObj.Get()  'explicitly 
        ' Now it is faster because the object
        ' has already been retrieved.
        Dim p As String = mObj("SomeProperty")

        Console.WriteLine(p)

        Return 0
    End Function
End Class

備註

第一次嘗試取得或設定 WMI 物件的資訊時，會隱含叫用 方法。 您也可以在使用者判斷時明確叫用，以更妥善地控制擷取的時間和方式。

.NET Framework 安全性

完全信任立即呼叫者。 這個成員無法供部分信任的程式碼使用。 如需詳細資訊，請參閱 使用部分信任程式碼的程式庫。

Get(ManagementOperationObserver)

來源:

ManagementObject.cs

非同步繫結至管理物件。

public:
 void Get(System::Management::ManagementOperationObserver ^ watcher);

public void Get (System.Management.ManagementOperationObserver watcher);

member this.Get : System.Management.ManagementOperationObserver -> unit

Public Sub Get (watcher As ManagementOperationObserver)

參數

watcher

ManagementOperationObserver

要將作業結果當成事件接收的物件。

範例

下列範例會 Get 呼叫 方法，以非同步方式取得 類別的 ManagementObject 實例。

using System;
using System.Management;

public class AsyncGetExample
{
    public AsyncGetExample()
    {
        ManagementObject o =
            new ManagementObject(
            "Win32_Process.Name='notepad.exe'");

        // Set up handlers for asynchronous get
        ManagementOperationObserver ob =
            new ManagementOperationObserver();
        ob.Completed += new
            CompletedEventHandler(this.Done);

        // Get the object asynchronously
        o.Get(ob);

        // Wait until operation is completed
        while (!this.Completed)
            System.Threading.Thread.Sleep (1000);

        // Here you can use the object
    }

    private bool completed = false;

    private void Done(object sender,
        CompletedEventArgs e)
    {
        Console.WriteLine("async Get completed !");
        completed = true;
    }

    private bool Completed
    {
        get
        {
            return completed;
        }
    }

    public static void Main()
    {
        AsyncGetExample example =
            new AsyncGetExample();
    }
}

Imports System.Management

Class AsyncGetExample

    Public Sub New()

        Dim o As New ManagementObject( _
            "Win32_Process.Name=""notepad.exe""")

        'Set up handlers for asynchronous get
        Dim ob As New ManagementOperationObserver
        AddHandler ob.Completed, AddressOf Me.Done

        'Get the object asynchronously
        o.Get(ob)

        'Wait until operation is completed
        While Not Me.Completed
            System.Threading.Thread.Sleep(1000)
        End While

        'Here you can use the object

    End Sub

    Private _completed As Boolean = False

    Private Sub Done(ByVal sender As Object, _
        ByVal e As CompletedEventArgs)
        Console.WriteLine("async Get completed !")
        _completed = True
    End Sub

    Private ReadOnly Property Completed() As Boolean
        Get
            Return _completed
        End Get
    End Property

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

        Dim example As New AsyncGetExample

        Return 0

    End Function


End Class

備註

方法會發出要求以取得 物件，然後立即傳回。 作業的結果接著會透過在提供的監看員物件上引發的事件來傳遞。

.NET Framework 安全性

完全信任立即呼叫者。 這個成員無法供部分信任的程式碼使用。 如需詳細資訊，請參閱 使用部分信任程式碼的程式庫。