PerformanceCounterCategory.GetCategories 方法
定义
重要
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检索计算机上注册的性能计数器类别的列表。
重载
| GetCategories() |
检索本地计算机上注册的性能计数器类别的列表。 |
| GetCategories(String) |
检索指定计算机上注册的性能计数器类别的列表。 |
GetCategories()
检索本地计算机上注册的性能计数器类别的列表。
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()返回
PerformanceCounterCategory 对象的数组，这些对象指示本地计算机上注册的类别。
例外
对基础系统 API 的调用失败。
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
下面的代码示例使用 GetCategories 方法从本地计算机或指定计算机返回对象的数组 PerformanceCounterCategory 。 它将数组转换为 PerformanceCounterCategory 类别名称数组，为用户排序和显示这些名称。 根据 GetCategories 是否指定了计算机名称来选择重载。
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
注解
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
适用于
GetCategories(String)
检索指定计算机上注册的性能计数器类别的列表。
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()参数
- machineName
- String
要查看的计算机。
返回
PerformanceCounterCategory 对象的数组，这些对象指示指定计算机上注册的类别。
例外
machineName 参数无效。
对基础系统 API 的调用失败。
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
下面的代码示例使用 GetCategories 方法从本地计算机或指定计算机返回对象的数组 PerformanceCounterCategory 。 它将数组转换为 PerformanceCounterCategory 类别名称数组，为用户排序和显示这些名称。 根据 GetCategories 是否指定了计算机名称来选择重载。
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
注解
若要检索本地计算机上的类别，请使用另一个重载或传递“.”作为 machineName 参数。
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。
