PerformanceCounterCategory.GetCounters 方法

定義

命名空間:

System.Diagnostics

組件:

System.Diagnostics.PerformanceCounter.dll

套件:

System.Diagnostics.PerformanceCounter v8.0.0

擷取這個效能計數器分類中的計數器清單。

多載

GetCounters()	擷取只包含一個執行個體的效能計數器分類中的計數器清單。
GetCounters(String)	擷取包含一個或多個執行個體的效能計數器分類中的計數器清單。

GetCounters()

來源:

PerformanceCounterCategory.cs

擷取只包含一個執行個體的效能計數器分類中的計數器清單。

public:
 cli::array <System::Diagnostics::PerformanceCounter ^> ^ GetCounters();

public System.Diagnostics.PerformanceCounter[] GetCounters ();

member this.GetCounters : unit -> System.Diagnostics.PerformanceCounter[]

Public Function GetCounters () As PerformanceCounter()

傳回

PerformanceCounter[]

PerformanceCounter 物件的陣列，指出與這個單一執行個體效能計數器分類相關的計數器。

例外狀況

ArgumentException

分類不是單一的執行個體。

Win32Exception

對基礎系統 API 的呼叫失敗。

InvalidOperationException

此分類沒有相關聯的執行個體。

UnauthorizedAccessException

以不具有系統管理員權限執行的程式碼嘗試讀取效能計數器。

範例

下列程式代碼範例會取得 中的PerformanceCounterCategory物件清單PerformanceCounter。 它會先 PerformanceCounterCategory 根據是否指定電腦名稱，建立具有適當建構函式的 。 然後， GetCounters 它會使用 方法來傳回 對象的陣列 PerformanceCounter ，並根據是否已指定實例名稱來選取 GetCounters 多載。

除非 GetCounters() 此多載與單一實例類別搭配使用，否則此多載會失敗。

public:
    static void Main(array<String^>^ args)
    {
        String^ categoryName = "";
        String^ machineName = "";
        String^ instanceName = "";
        PerformanceCounterCategory^ pcc;
        array<PerformanceCounter^>^ counters;

        // Copy the supplied arguments into the local variables.
        try
        {
            categoryName = args[1];
            machineName = args[2]=="."? "": args[2];
            instanceName = args[3];
        }
        catch (...)
        {
            // Ignore the exception from non-supplied arguments.
        }

        try
        {
            // Create the appropriate PerformanceCounterCategory object.
            if (machineName->Length>0)
            {
                pcc = gcnew PerformanceCounterCategory(categoryName, machineName);
            }
            else
            {
                pcc = gcnew PerformanceCounterCategory(categoryName);
            }

            // Get the counters for this instance or a single instance
            // of the selected category.
            if (instanceName->Length > 0)
            {
                counters = pcc->GetCounters(instanceName);
            }
            else
            {
                counters = pcc->GetCounters();
            }

        }
        catch (Exception^ ex)
        {
            Console::WriteLine("Unable to get counter information for " +
                (instanceName->Length>0? "instance \"{2}\" in ": "single-instance ") +
                "category \"{0}\" on " + (machineName->Length>0? "computer \"{1}\":": "this computer:"),
                categoryName, machineName, instanceName);
            Console::WriteLine(ex->Message);
            return;
        }

        // Display the counter names if GetCounters was successful.
        if (counters != nullptr)
        {
            Console::WriteLine("These counters exist in " +
                (instanceName->Length > 0 ? "instance \"{1}\" of" : "single instance") +
                " category {0} on " + (machineName->Length > 0 ? "computer \"{2}\":": "this computer:"),
                categoryName, instanceName, machineName);

            // Display a numbered list of the counter names.
            int objX;
            for(objX = 0; objX < counters->Length; objX++)
            {
                Console::WriteLine("{0,4} - {1}", objX + 1, counters[objX]->CounterName);
            }
        }
    }

public static void Main(string[] args)
{
    string categoryName = "";
    string machineName = "";
    string instanceName = "";
    PerformanceCounterCategory pcc;
    PerformanceCounter[] counters;

    // Copy the supplied arguments into the local variables.
    try
    {
        categoryName = args[0];
        machineName = args[1]=="."? "": args[1];
        instanceName = args[2];
    }
    catch
    {
        // Ignore the exception from non-supplied arguments.
    }

    try
    {
        // Create the appropriate PerformanceCounterCategory object.
        if (machineName.Length>0)
        {
            pcc = new PerformanceCounterCategory(categoryName, machineName);
        }
        else
        {
            pcc = new PerformanceCounterCategory(categoryName);
        }

        // Get the counters for this instance or a single instance
        // of the selected category.
        if (instanceName.Length>0)
        {
            counters = pcc.GetCounters(instanceName);
        }
        else
        {
            counters = pcc.GetCounters();
        }
    }
    catch(Exception ex)
    {
        Console.WriteLine("Unable to get counter information for " +
            (instanceName.Length>0? "instance \"{2}\" in ": "single-instance ") +
            "category \"{0}\" on " + (machineName.Length>0? "computer \"{1}\":": "this computer:"),
            categoryName, machineName, instanceName);
        Console.WriteLine(ex.Message);
        return;
    }

    // Display the counter names if GetCounters was successful.
    if (counters!=null)
    {
        Console.WriteLine("These counters exist in " +
            (instanceName.Length>0? "instance \"{1}\" of": "single instance") +
            " category {0} on " + (machineName.Length>0? "computer \"{2}\":": "this computer:"),
            categoryName, instanceName, machineName);

        // Display a numbered list of the counter names.
        int objX;
        for(objX=0; objX<counters.Length; objX++)
        {
            Console.WriteLine("{0,4} - {1}", objX+1, counters[objX].CounterName);
        }
    }
}

Sub Main(ByVal args() As String)
    Dim categoryName As String = ""
    Dim machineName As String = ""
    Dim instanceName As String = ""
    Dim pcc As PerformanceCounterCategory
    Dim counters() As PerformanceCounter

    ' Copy the supplied arguments into the local variables.
    Try
        categoryName = args(0)
        machineName = IIf(args(1) = ".", "", args(1))
        instanceName = args(2)
    Catch ex As Exception
        ' Ignore the exception from non-supplied arguments.
    End Try

    Try
        ' Create the appropriate PerformanceCounterCategory object.
        If machineName.Length > 0 Then
            pcc = New PerformanceCounterCategory(categoryName, machineName)
        Else
            pcc = New PerformanceCounterCategory(categoryName)
        End If

        ' Get the counters for this instance or a single instance 
        ' of the selected category.
        If instanceName.Length > 0 Then
            counters = pcc.GetCounters(instanceName)
        Else
            counters = pcc.GetCounters()
        End If

    Catch ex As Exception
        Console.WriteLine("Unable to get counter information for " & _
            IIf(instanceName.Length > 0, "instance ""{2}"" in ", _
            "single-instance ") & "category ""{0}"" on " & _
            IIf(machineName.Length > 0, "computer ""{1}"":", _
            "this computer:"), _
            categoryName, machineName, instanceName)
        Console.WriteLine(ex.Message)
        Return
    End Try

    ' Display the counter names if GetCounters was successful.
    If Not counters Is Nothing Then
        Console.WriteLine("These counters exist in " & _
            IIf(instanceName.Length > 0, "instance ""{1}"" of", _
            "single instance") & " category {0} on " & _
            IIf(machineName.Length > 0, _
                "computer ""{2}"":", "this computer:"), _
            categoryName, instanceName, machineName)

        ' Display a numbered list of the counter names.
        Dim objX As Integer
        For objX = 0 To counters.Length - 1
            Console.WriteLine("{0,4} - {1}", objX + 1, _
                counters(objX).CounterName)
        Next objX
    End If
End Sub

備註

如需效能物件實例的詳細資訊，請參閱 PerformanceCounter 類別概觀。

注意

若要從 Windows Vista 和更新版本中的非互動式登入會話讀取性能計數器、Windows XP Professional x64 Edition 或 Windows Server 2003，您必須是 效能監視器 Users 群組的成員，或具有系統管理許可權。

若要避免提高許可權以存取 Windows Vista 和更新版本中的性能計數器，請將您自己新增至 效能監視器 Users 群組。

在 Windows Vista (含) 以後版本中，使用者帳戶控制 (UAC) 會判斷使用者的權限。 如果您是內建 Administrators 群組的成員，系統會將兩個執行階段存取語彙基元 (Token) 指派給您：標準使用者存取語彙基元及管理員存取語彙基元。 根據預設，您會屬於標準使用者角色。 若要執行存取性能計數器的程式代碼，您必須先將許可權從標準使用者提升為系統管理員。 您可以在啟動應用程式時，以滑鼠右鍵按一下應用程式圖示，並指出您想要以系統管理員身分執行，藉此提高為系統管理員權限。

另請參閱

• PerformanceCounter

GetCounters(String)

來源:

PerformanceCounterCategory.cs

擷取包含一個或多個執行個體的效能計數器分類中的計數器清單。

public:
 cli::array <System::Diagnostics::PerformanceCounter ^> ^ GetCounters(System::String ^ instanceName);

public System.Diagnostics.PerformanceCounter[] GetCounters (string instanceName);

member this.GetCounters : string -> System.Diagnostics.PerformanceCounter[]

Public Function GetCounters (instanceName As String) As PerformanceCounter()

參數

instanceName

String

要為其擷取相關計數器清單的效能物件執行個體。

傳回

PerformanceCounter[]

PerformanceCounter 物件的陣列，指出與這個效能計數器分類的指定物件執行個體相關的計數器。

例外狀況

ArgumentNullException

instanceName 參數為 null。

InvalidOperationException

這個 CategoryName 執行個體的 PerformanceCounterCategory 屬性尚未設定。

-或-

分類不包含 instanceName 參數所指定的執行個體。

Win32Exception

對基礎系統 API 的呼叫失敗。

UnauthorizedAccessException

以不具有系統管理員權限執行的程式碼嘗試讀取效能計數器。

範例

下列程式代碼範例會取得 中的PerformanceCounterCategory物件清單PerformanceCounter。 它會先 PerformanceCounterCategory 根據是否指定電腦名稱，建立具有適當建構函式的 。 然後， GetCounters 它會使用 方法來傳回 對象的陣列 PerformanceCounter ，並根據是否已指定實例名稱來選取 GetCounters 多載。

除非此多載與包含實例的類別搭配使用，否則此 GetCounters(String) 多載會失敗。

public:
    static void Main(array<String^>^ args)
    {
        String^ categoryName = "";
        String^ machineName = "";
        String^ instanceName = "";
        PerformanceCounterCategory^ pcc;
        array<PerformanceCounter^>^ counters;

        // Copy the supplied arguments into the local variables.
        try
        {
            categoryName = args[1];
            machineName = args[2]=="."? "": args[2];
            instanceName = args[3];
        }
        catch (...)
        {
            // Ignore the exception from non-supplied arguments.
        }

        try
        {
            // Create the appropriate PerformanceCounterCategory object.
            if (machineName->Length>0)
            {
                pcc = gcnew PerformanceCounterCategory(categoryName, machineName);
            }
            else
            {
                pcc = gcnew PerformanceCounterCategory(categoryName);
            }

            // Get the counters for this instance or a single instance
            // of the selected category.
            if (instanceName->Length > 0)
            {
                counters = pcc->GetCounters(instanceName);
            }
            else
            {
                counters = pcc->GetCounters();
            }

        }
        catch (Exception^ ex)
        {
            Console::WriteLine("Unable to get counter information for " +
                (instanceName->Length>0? "instance \"{2}\" in ": "single-instance ") +
                "category \"{0}\" on " + (machineName->Length>0? "computer \"{1}\":": "this computer:"),
                categoryName, machineName, instanceName);
            Console::WriteLine(ex->Message);
            return;
        }

        // Display the counter names if GetCounters was successful.
        if (counters != nullptr)
        {
            Console::WriteLine("These counters exist in " +
                (instanceName->Length > 0 ? "instance \"{1}\" of" : "single instance") +
                " category {0} on " + (machineName->Length > 0 ? "computer \"{2}\":": "this computer:"),
                categoryName, instanceName, machineName);

            // Display a numbered list of the counter names.
            int objX;
            for(objX = 0; objX < counters->Length; objX++)
            {
                Console::WriteLine("{0,4} - {1}", objX + 1, counters[objX]->CounterName);
            }
        }
    }

public static void Main(string[] args)
{
    string categoryName = "";
    string machineName = "";
    string instanceName = "";
    PerformanceCounterCategory pcc;
    PerformanceCounter[] counters;

    // Copy the supplied arguments into the local variables.
    try
    {
        categoryName = args[0];
        machineName = args[1]=="."? "": args[1];
        instanceName = args[2];
    }
    catch
    {
        // Ignore the exception from non-supplied arguments.
    }

    try
    {
        // Create the appropriate PerformanceCounterCategory object.
        if (machineName.Length>0)
        {
            pcc = new PerformanceCounterCategory(categoryName, machineName);
        }
        else
        {
            pcc = new PerformanceCounterCategory(categoryName);
        }

        // Get the counters for this instance or a single instance
        // of the selected category.
        if (instanceName.Length>0)
        {
            counters = pcc.GetCounters(instanceName);
        }
        else
        {
            counters = pcc.GetCounters();
        }
    }
    catch(Exception ex)
    {
        Console.WriteLine("Unable to get counter information for " +
            (instanceName.Length>0? "instance \"{2}\" in ": "single-instance ") +
            "category \"{0}\" on " + (machineName.Length>0? "computer \"{1}\":": "this computer:"),
            categoryName, machineName, instanceName);
        Console.WriteLine(ex.Message);
        return;
    }

    // Display the counter names if GetCounters was successful.
    if (counters!=null)
    {
        Console.WriteLine("These counters exist in " +
            (instanceName.Length>0? "instance \"{1}\" of": "single instance") +
            " category {0} on " + (machineName.Length>0? "computer \"{2}\":": "this computer:"),
            categoryName, instanceName, machineName);

        // Display a numbered list of the counter names.
        int objX;
        for(objX=0; objX<counters.Length; objX++)
        {
            Console.WriteLine("{0,4} - {1}", objX+1, counters[objX].CounterName);
        }
    }
}

Sub Main(ByVal args() As String)
    Dim categoryName As String = ""
    Dim machineName As String = ""
    Dim instanceName As String = ""
    Dim pcc As PerformanceCounterCategory
    Dim counters() As PerformanceCounter

    ' Copy the supplied arguments into the local variables.
    Try
        categoryName = args(0)
        machineName = IIf(args(1) = ".", "", args(1))
        instanceName = args(2)
    Catch ex As Exception
        ' Ignore the exception from non-supplied arguments.
    End Try

    Try
        ' Create the appropriate PerformanceCounterCategory object.
        If machineName.Length > 0 Then
            pcc = New PerformanceCounterCategory(categoryName, machineName)
        Else
            pcc = New PerformanceCounterCategory(categoryName)
        End If

        ' Get the counters for this instance or a single instance 
        ' of the selected category.
        If instanceName.Length > 0 Then
            counters = pcc.GetCounters(instanceName)
        Else
            counters = pcc.GetCounters()
        End If

    Catch ex As Exception
        Console.WriteLine("Unable to get counter information for " & _
            IIf(instanceName.Length > 0, "instance ""{2}"" in ", _
            "single-instance ") & "category ""{0}"" on " & _
            IIf(machineName.Length > 0, "computer ""{1}"":", _
            "this computer:"), _
            categoryName, machineName, instanceName)
        Console.WriteLine(ex.Message)
        Return
    End Try

    ' Display the counter names if GetCounters was successful.
    If Not counters Is Nothing Then
        Console.WriteLine("These counters exist in " & _
            IIf(instanceName.Length > 0, "instance ""{1}"" of", _
            "single instance") & " category {0} on " & _
            IIf(machineName.Length > 0, _
                "computer ""{2}"":", "this computer:"), _
            categoryName, instanceName, machineName)

        ' Display a numbered list of the counter names.
        Dim objX As Integer
        For objX = 0 To counters.Length - 1
            Console.WriteLine("{0,4} - {1}", objX + 1, _
                counters(objX).CounterName)
        Next objX
    End If
End Sub

備註

若要表示單一實例類別目錄，請為 參數傳遞空字串 (“”) instanceName 。

如需效能物件實例的詳細資訊，請參閱 PerformanceCounter 類別概觀。

注意

若要從 Windows Vista 和更新版本中的非互動式登入會話讀取性能計數器、Windows XP Professional x64 Edition 或 Windows Server 2003，您必須是 效能監視器 Users 群組的成員，或具有系統管理許可權。

若要避免提高許可權以存取 Windows Vista 和更新版本中的性能計數器，請將您自己新增至 效能監視器 Users 群組。

在 Windows Vista (含) 以後版本中，使用者帳戶控制 (UAC) 會判斷使用者的權限。 如果您是內建 Administrators 群組的成員，系統會將兩個執行階段存取語彙基元 (Token) 指派給您：標準使用者存取語彙基元及管理員存取語彙基元。 根據預設，您會屬於標準使用者角色。 若要執行存取性能計數器的程式代碼，您必須先將許可權從標準使用者提升為系統管理員。 您可以在啟動應用程式時，以滑鼠右鍵按一下應用程式圖示，並指出您想要以系統管理員身分執行，藉此提高為系統管理員權限。

另請參閱

• PerformanceCounter