PerformanceCounterCategory.GetCounters 方法

定义

命名空间:

System.Diagnostics

程序集:

System.Diagnostics.PerformanceCounter.dll

包:

System.Diagnostics.PerformanceCounter v8.0.0

检索此性能计数器类别中的计数器列表。

重载

GetCounters()	检索正好包含一个实例的某性能计数器类别中的计数器列表。
GetCounters(String)	检索包含一个或多个实例的某性能计数器类别中的计数器列表。

GetCounters()

Source:

PerformanceCounterCategory.cs

检索正好包含一个实例的某性能计数器类别中的计数器列表。

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

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

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

Public Function GetCounters () As PerformanceCounter()

返回

PerformanceCounter[]

PerformanceCounter 对象的数组，这些对象指示与此单实例性能计数器类别关联的计数器。

例外

ArgumentException

该类别不是单个实例。

Win32Exception

对基础系统 API 的调用失败。

InvalidOperationException

没有与该类别关联的实例。

UnauthorizedAccessException

以不具有管理特权的用户身份正在执行的代码尝试读取性能计数器。

示例

下面的代码示例获取 中PerformanceCounterCategory对象的列表PerformanceCounter。 它首先根据是否指定了计算机名称，使用适当的构造函数创建 PerformanceCounterCategory 。 然后， GetCounters 它使用 方法返回对象的数组 PerformanceCounter ，根据是否指定了实例名称来选择 GetCounters 重载。

此 GetCounters() 重载失败，除非它与单实例类别一起使用。

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

注解

有关性能对象实例的详细信息，请参阅 PerformanceCounter 类概述。

注意

若要从 Windows Vista 及更高版本、Windows XP Professional x64 Edition 或 Windows Server 2003 中的非交互式登录会话读取性能计数器，你必须是 性能监视器 用户组的成员或具有管理权限。

若要避免在 Windows Vista 及更高版本中提升访问性能计数器的权限，请将自己添加到 性能监视器 用户组。

在 Windows Vista 或更高版本中，用户帐户控制 (UAC) 决定用户的特权。 如果您是内置的 Administrators 组的成员，将为您分配两个运行时访问令牌：一个标准用户访问令牌和一个管理员访问令牌。 默认情况下，您拥有标准用户角色。 若要执行访问性能计数器的代码，必须先将权限从标准用户提升为管理员。 你可以通过以下方式执行此操作：右键单击应用程序图标并指示需以管理员身份运行。

另请参阅

• PerformanceCounter

GetCounters(String)

Source:

PerformanceCounterCategory.cs

检索包含一个或多个实例的某性能计数器类别中的计数器列表。

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()

参数

instanceName

String

要为其检索关联计数器列表的性能对象实例。

返回

PerformanceCounter[]

PerformanceCounter 对象的数组，这些对象指示与此性能计数器类别的指定对象实例关联的计数器。

例外

ArgumentNullException

instanceName 参数为 null。

InvalidOperationException

尚未设置此 CategoryName 实例的 PerformanceCounterCategory 属性。

- 或 -

该类别不包含由 instanceName 参数指定的实例。

Win32Exception

对基础系统 API 的调用失败。

UnauthorizedAccessException

以不具有管理特权的用户身份正在执行的代码尝试读取性能计数器。

示例

下面的代码示例获取 中PerformanceCounterCategory对象的列表PerformanceCounter。 它首先根据是否指定了计算机名称，使用适当的构造函数创建 PerformanceCounterCategory 。 然后， GetCounters 它使用 方法返回对象的数组 PerformanceCounter ，根据是否指定了实例名称来选择 GetCounters 重载。

此 GetCounters(String) 重载失败，除非它与包含实例的类别一起使用。

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

注解

若要表示单实例类别，请为 instanceName 参数传递空字符串 (“”) 。

有关性能对象实例的详细信息，请参阅 PerformanceCounter 类概述。

注意

若要从 Windows Vista 及更高版本、Windows XP Professional x64 Edition 或 Windows Server 2003 中的非交互式登录会话读取性能计数器，你必须是 性能监视器 用户组的成员或具有管理权限。

若要避免在 Windows Vista 及更高版本中提升访问性能计数器的权限，请将自己添加到 性能监视器 用户组。

在 Windows Vista 或更高版本中，用户帐户控制 (UAC) 决定用户的特权。 如果您是内置的 Administrators 组的成员，将为您分配两个运行时访问令牌：一个标准用户访问令牌和一个管理员访问令牌。 默认情况下，您拥有标准用户角色。 若要执行访问性能计数器的代码，必须先将权限从标准用户提升为管理员。 你可以通过以下方式执行此操作：右键单击应用程序图标并指示需以管理员身份运行。

另请参阅

• PerformanceCounter