InstanceData 类
保存与性能计数器样本关联的实例数据。
**命名空间:**System.Diagnostics
**程序集:**System(在 system.dll 中)
语法
声明
Public Class InstanceData
用法
Dim instance As InstanceData
public class InstanceData
public ref class InstanceData
public class InstanceData
public class InstanceData
示例
下面的代码示例显示在本地计算机上的特定 PerformanceCounterCategory 中存在的 InstanceData 对象的内容。它首先显示 PerformanceCounter 类别的编号列表。用户输入其中一个类别的编号之后,示例为 PerformanceCounterCategory 中的每个 PerformanceCounter 显示与 PerformanceCounter 的每个实例关联的实例数据。
Imports System
Imports System.Diagnostics
Imports Microsoft.VisualBasic
Module InstDataCopyToMod
Private categoryName As String
Sub Main()
Dim catNumStr As String
Dim categoryNum As Integer
Dim categories() As PerformanceCounterCategory = _
PerformanceCounterCategory.GetCategories()
' Create and sort an array of category names.
Dim categoryNames(categories.Length - 1) As String
Dim catX As Integer
For catX = 0 To categories.Length - 1
categoryNames(catX) = categories(catX).CategoryName
Next
Array.Sort(categoryNames)
Console.WriteLine( _
"These categories are registered on this computer:")
For catX = 0 To categories.Length - 1
Console.WriteLine("{0,4} - {1}", catX + 1, _
categoryNames(catX))
Next catX
' Ask the user to choose a category.
Console.Write( _
"Enter the category number from the above list: ")
catNumStr = Console.ReadLine()
' Validate the entered category number.
Try
categoryNum = Integer.Parse(catNumStr)
If categoryNum < 1 Or categoryNum > categories.Length Then
Throw New Exception( _
String.Format("The category number must be in the " & _
"range 1..{0}.", categories.Length))
End If
categoryName = categoryNames((categoryNum - 1))
Catch ex As Exception
Console.WriteLine("""{0}"" is not a valid category number." & _
vbCrLf & "{1}", catNumStr, ex.Message)
Return
End Try
' Process the InstanceDataCollectionCollection for this category.
Dim pcc As New PerformanceCounterCategory(categoryName)
Dim idColCol As InstanceDataCollectionCollection = pcc.ReadCategory()
Dim idColArray(idColCol.Count - 1) As InstanceDataCollection
Console.WriteLine("InstanceDataCollectionCollection for ""{0}"" " & _
"has {1} elements.", categoryName, idColCol.Count)
' Copy and process the InstanceDataCollection array.
idColCol.CopyTo(idColArray, 0)
Dim idCol As InstanceDataCollection
For Each idCol In idColArray
ProcessInstanceDataCollection(idCol)
Next idCol
End Sub
' Display the contents of an InstanceDataCollection.
Sub ProcessInstanceDataCollection(ByVal idCol As InstanceDataCollection)
Dim instDataArray(idCol.Count - 1) As InstanceData
Console.WriteLine(" InstanceDataCollection for ""{0}"" " & _
"has {1} elements.", idCol.CounterName, idCol.Count)
' Copy and process the InstanceData array.
idCol.CopyTo(instDataArray, 0)
Dim idX As Integer
For idX = 0 To instDataArray.Length - 1
ProcessInstanceDataObject(instDataArray(idX).InstanceName, _
instDataArray(idX).Sample)
Next idX
End Sub
' Display the contents of an InstanceData object.
Sub ProcessInstanceDataObject(ByVal name As String, _
ByVal CSRef As CounterSample)
Dim instData As New InstanceData(name, CSRef)
Console.WriteLine(" Data from InstanceData object:" & vbCrLf & _
" InstanceName: {0,-31} RawValue: {1}", _
instData.InstanceName, instData.RawValue)
Dim sample As CounterSample = instData.Sample
Console.WriteLine(" Data from CounterSample object:" & vbCrLf & _
" CounterType: {0,-32} SystemFrequency: {1}" & vbCrLf & _
" BaseValue: {2,-34} RawValue: {3}" & vbCrLf & _
" CounterFrequency: {4,-27} CounterTimeStamp: {5}" & vbCrLf & _
" TimeStamp: {6,-34} TimeStamp100nSec: {7}", _
sample.CounterType, sample.SystemFrequency, sample.BaseValue, _
sample.RawValue, sample.CounterFrequency, sample.CounterTimeStamp, _
sample.TimeStamp, sample.TimeStamp100nSec)
End Sub
End Module
继承层次结构
System.Object
System.Diagnostics.InstanceData
线程安全
此类型的任何公共静态(Visual Basic 中的 Shared)成员都是线程安全的,但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0