共用方式為

PerformanceCounterCategory.GetCategories 方法

  • 參考

定義

命名空間:
System.Diagnostics
組件:
System.Diagnostics.PerformanceCounter.dll
組件:
System.dll
套件:
System.Diagnostics.PerformanceCounter v6.0.0
套件:
System.Diagnostics.PerformanceCounter v7.0.0
套件:
System.Diagnostics.PerformanceCounter v8.0.0
套件:
System.Diagnostics.PerformanceCounter v9.0.0-preview.2.24128.5

擷取登錄在電腦上的效能計數器分類清單。

多載

GetCategories()

擷取登錄在本機電腦上的效能計數器分類清單。
GetCategories(String)

擷取登錄在指定電腦上的效能計數器分類清單。

GetCategories()

來源:
PerformanceCounterCategory.cs
來源:
PerformanceCounterCategory.cs
來源:
PerformanceCounterCategory.cs

擷取登錄在本機電腦上的效能計數器分類清單。

public:
 static cli::array <System::Diagnostics::PerformanceCounterCategory ^> ^ GetCategories();
public static System.Diagnostics.PerformanceCounterCategory[] GetCategories ();
static member GetCategories : unit -> System.Diagnostics.PerformanceCounterCategory[]
Public Shared Function GetCategories () As PerformanceCounterCategory()

傳回

PerformanceCounterCategory[]

PerformanceCounterCategory 物件的陣列，指出登錄在本機電腦上的分類。

例外狀況

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 GetCategories 使用 方法，從本機計算機或指定的計算機傳回物件的陣列 PerformanceCounterCategory 。 它會將 PerformanceCounterCategory 陣列轉換成類別名稱的陣列，它會為使用者排序和顯示。 系統會 GetCategories 根據是否指定計算機名稱來選取多載。

public:
    static void Main(array<String^>^ args)
    {
        String^ machineName = "";
        array<PerformanceCounterCategory^>^ categories;

        // Copy the machine name argument into the local variable.
        try
        {
            machineName = args[1]=="."? "": args[1];
        }
        catch (...)
        {
        }

        // Generate a list of categories registered on the specified computer.
        try
        {
            if (machineName->Length > 0)
            {
                categories = PerformanceCounterCategory::GetCategories(machineName);
            }
            else
            {
                categories = PerformanceCounterCategory::GetCategories();
            }
        }
        catch(Exception^ ex)
        {
            Console::WriteLine("Unable to get categories on " +
                (machineName->Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);
            Console::WriteLine(ex->Message);
            return;
        }

        Console::WriteLine("These categories are registered on " +
            (machineName->Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);

        // Create and sort an array of category names.
        array<String^>^ categoryNames = gcnew array<String^>(categories->Length);
        int objX;
        for (objX = 0; objX < categories->Length; objX++)
        {
            categoryNames[objX] = categories[objX]->CategoryName;
        }
        Array::Sort(categoryNames);

        for (objX = 0; objX < categories->Length; objX++)
        {
            Console::WriteLine("{0,4} - {1}", objX + 1, categoryNames[objX]);
        }
    }

public static void Main(string[] args)
{
    string machineName = "";
    PerformanceCounterCategory[] categories;

    // Copy the machine name argument into the local variable.
    try
    {
        machineName = args[0]=="."? "": args[0];
    }
    catch
    {
    }

    // Generate a list of categories registered on the specified computer.
    try
    {
        if (machineName.Length > 0)
        {
            categories = PerformanceCounterCategory.GetCategories(machineName);
        }
        else
        {
            categories = PerformanceCounterCategory.GetCategories();
        }
    }
    catch(Exception ex)
    {
        Console.WriteLine("Unable to get categories on " +
            (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);
        Console.WriteLine(ex.Message);
        return;
    }

    Console.WriteLine("These categories are registered on " +
        (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);

    // Create and sort an array of category names.
    string[] categoryNames = new string[categories.Length];
    int objX;
    for(objX = 0; objX < categories.Length; objX++)
    {
        categoryNames[objX] = categories[objX].CategoryName;
    }
    Array.Sort(categoryNames);

    for(objX = 0; objX < categories.Length; objX++)
    {
        Console.WriteLine("{0,4} - {1}", objX + 1, categoryNames[objX]);
    }
}

Sub Main(ByVal args() As String)
    Dim machineName As String = ""
    Dim categories() As PerformanceCounterCategory

    ' Copy the machine name argument into the local variable.
    Try
        machineName = IIf(args(0) = ".", "", args(0))
    Catch ex As Exception
    End Try

    ' Generate a list of categories registered on the specified computer.
    Try
        If machineName.Length > 0 Then
            categories = _
                PerformanceCounterCategory.GetCategories(machineName)
        Else
            categories = PerformanceCounterCategory.GetCategories()
        End If
    Catch ex As Exception
        Console.WriteLine("Unable to get categories on " & _
            IIf(machineName.Length > 0, "computer ""{0}"":", _
            "this computer:"), machineName)
        Console.WriteLine(ex.Message)
        Return
    End Try

    Console.WriteLine("These categories are registered on " & _
        IIf(machineName.Length > 0, _
            "computer ""{0}"":", "this computer:"), machineName)

    ' Create and sort an array of category names.
    Dim categoryNames(categories.Length - 1) As String
    Dim objX As Integer
    For objX = 0 To categories.Length - 1
        Console.WriteLine("{0}, {1}", objX, categories(objX).CategoryName)
        categoryNames(objX) = categories(objX).CategoryName
    Next objX
    Array.Sort(categoryNames)

    For objX = 0 To categories.Length - 1
        Console.WriteLine("{0,4} - {1}", objX + 1, categoryNames(objX))
    Next objX
End Sub

備註

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

適用於

GetCategories(String)

來源:
PerformanceCounterCategory.cs
來源:
PerformanceCounterCategory.cs
來源:
PerformanceCounterCategory.cs

擷取登錄在指定電腦上的效能計數器分類清單。

public:
 static cli::array <System::Diagnostics::PerformanceCounterCategory ^> ^ GetCategories(System::String ^ machineName);
public static System.Diagnostics.PerformanceCounterCategory[] GetCategories (string machineName);
static member GetCategories : string -> System.Diagnostics.PerformanceCounterCategory[]
Public Shared Function GetCategories (machineName As String) As PerformanceCounterCategory()

參數

machineName
String

要觀察的電腦。

傳回

PerformanceCounterCategory[]

PerformanceCounterCategory 物件的陣列，指出登錄在指定電腦上的分類。

例外狀況

ArgumentException

machineName 參數無效。

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 GetCategories 使用 方法，從本機計算機或指定的計算機傳回物件的陣列 PerformanceCounterCategory 。 它會將 PerformanceCounterCategory 陣列轉換成類別名稱的陣列，它會為使用者排序和顯示。 系統會 GetCategories 根據是否指定計算機名稱來選取多載。

public:
    static void Main(array<String^>^ args)
    {
        String^ machineName = "";
        array<PerformanceCounterCategory^>^ categories;

        // Copy the machine name argument into the local variable.
        try
        {
            machineName = args[1]=="."? "": args[1];
        }
        catch (...)
        {
        }

        // Generate a list of categories registered on the specified computer.
        try
        {
            if (machineName->Length > 0)
            {
                categories = PerformanceCounterCategory::GetCategories(machineName);
            }
            else
            {
                categories = PerformanceCounterCategory::GetCategories();
            }
        }
        catch(Exception^ ex)
        {
            Console::WriteLine("Unable to get categories on " +
                (machineName->Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);
            Console::WriteLine(ex->Message);
            return;
        }

        Console::WriteLine("These categories are registered on " +
            (machineName->Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);

        // Create and sort an array of category names.
        array<String^>^ categoryNames = gcnew array<String^>(categories->Length);
        int objX;
        for (objX = 0; objX < categories->Length; objX++)
        {
            categoryNames[objX] = categories[objX]->CategoryName;
        }
        Array::Sort(categoryNames);

        for (objX = 0; objX < categories->Length; objX++)
        {
            Console::WriteLine("{0,4} - {1}", objX + 1, categoryNames[objX]);
        }
    }

public static void Main(string[] args)
{
    string machineName = "";
    PerformanceCounterCategory[] categories;

    // Copy the machine name argument into the local variable.
    try
    {
        machineName = args[0]=="."? "": args[0];
    }
    catch
    {
    }

    // Generate a list of categories registered on the specified computer.
    try
    {
        if (machineName.Length > 0)
        {
            categories = PerformanceCounterCategory.GetCategories(machineName);
        }
        else
        {
            categories = PerformanceCounterCategory.GetCategories();
        }
    }
    catch(Exception ex)
    {
        Console.WriteLine("Unable to get categories on " +
            (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);
        Console.WriteLine(ex.Message);
        return;
    }

    Console.WriteLine("These categories are registered on " +
        (machineName.Length > 0 ? "computer \"{0}\":": "this computer:"), machineName);

    // Create and sort an array of category names.
    string[] categoryNames = new string[categories.Length];
    int objX;
    for(objX = 0; objX < categories.Length; objX++)
    {
        categoryNames[objX] = categories[objX].CategoryName;
    }
    Array.Sort(categoryNames);

    for(objX = 0; objX < categories.Length; objX++)
    {
        Console.WriteLine("{0,4} - {1}", objX + 1, categoryNames[objX]);
    }
}

Sub Main(ByVal args() As String)
    Dim machineName As String = ""
    Dim categories() As PerformanceCounterCategory

    ' Copy the machine name argument into the local variable.
    Try
        machineName = IIf(args(0) = ".", "", args(0))
    Catch ex As Exception
    End Try

    ' Generate a list of categories registered on the specified computer.
    Try
        If machineName.Length > 0 Then
            categories = _
                PerformanceCounterCategory.GetCategories(machineName)
        Else
            categories = PerformanceCounterCategory.GetCategories()
        End If
    Catch ex As Exception
        Console.WriteLine("Unable to get categories on " & _
            IIf(machineName.Length > 0, "computer ""{0}"":", _
            "this computer:"), machineName)
        Console.WriteLine(ex.Message)
        Return
    End Try

    Console.WriteLine("These categories are registered on " & _
        IIf(machineName.Length > 0, _
            "computer ""{0}"":", "this computer:"), machineName)

    ' Create and sort an array of category names.
    Dim categoryNames(categories.Length - 1) As String
    Dim objX As Integer
    For objX = 0 To categories.Length - 1
        Console.WriteLine("{0}, {1}", objX, categories(objX).CategoryName)
        categoryNames(objX) = categories(objX).CategoryName
    Next objX
    Array.Sort(categoryNames)

    For objX = 0 To categories.Length - 1
        Console.WriteLine("{0,4} - {1}", objX + 1, categoryNames(objX))
    Next objX
End Sub

備註

若要擷取本機電腦上的類別，請使用另一個多載或傳遞 “.”。machineName

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

適用於