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InstanceDataCollectionCollection Class

Provides a strongly typed collection of InstanceDataCollection objects.

System.Object
  System.Collections.DictionaryBase
    System.Diagnostics.InstanceDataCollectionCollection

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

'Declaration
Public Class InstanceDataCollectionCollection _
	Inherits DictionaryBase

The InstanceDataCollectionCollection type exposes the following members.

  NameDescription
Public methodInstanceDataCollectionCollection Obsolete. Initializes a new instance of the InstanceDataCollectionCollection class.
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  NameDescription
Public propertyCountGets the number of elements contained in the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected propertyDictionaryGets the list of elements contained in the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected propertyInnerHashtableGets the list of elements contained in the DictionaryBase instance. (Inherited from DictionaryBase.)
Public propertyItemGets the instance data for the specified counter.
Public propertyKeysGets the object and counter registry keys for the objects associated with this instance data collection.
Public propertyValuesGets the instance data values that comprise the collection of instances for the counter.
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  NameDescription
Public methodClearClears the contents of the DictionaryBase instance. (Inherited from DictionaryBase.)
Public methodContainsDetermines whether an instance data collection for the specified counter (identified by one of the indexed InstanceDataCollection objects) exists in the collection.
Public methodCopyTo(Array, Int32)Copies the DictionaryBase elements to a one-dimensional Array at the specified index. (Inherited from DictionaryBase.)
Public methodCopyTo(InstanceDataCollection(), Int32)Copies an array of InstanceDataCollection instances to the collection, at the specified index.
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetEnumeratorReturns an IDictionaryEnumerator that iterates through the DictionaryBase instance. (Inherited from DictionaryBase.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Protected methodOnClearPerforms additional custom processes before clearing the contents of the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnClearCompletePerforms additional custom processes after clearing the contents of the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnGetGets the element with the specified key and value in the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnInsertPerforms additional custom processes before inserting a new element into the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnInsertCompletePerforms additional custom processes after inserting a new element into the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnRemovePerforms additional custom processes before removing an element from the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnRemoveCompletePerforms additional custom processes after removing an element from the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnSetPerforms additional custom processes before setting a value in the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnSetCompletePerforms additional custom processes after setting a value in the DictionaryBase instance. (Inherited from DictionaryBase.)
Protected methodOnValidatePerforms additional custom processes when validating the element with the specified key and value. (Inherited from DictionaryBase.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate propertyICollection.IsSynchronizedGets a value indicating whether access to a DictionaryBase object is synchronized (thread safe). (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyICollection.SyncRootGets an object that can be used to synchronize access to a DictionaryBase object. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate methodIDictionary.AddAdds an element with the specified key and value into the DictionaryBase. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate methodIDictionary.ContainsDetermines whether the DictionaryBase contains a specific key. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyIDictionary.IsFixedSizeGets a value indicating whether a DictionaryBase object has a fixed size. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyIDictionary.IsReadOnlyGets a value indicating whether a DictionaryBase object is read-only. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyIDictionary.ItemGets or sets the value associated with the specified key. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyIDictionary.KeysGets an ICollection object containing the keys in the DictionaryBase object. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate methodIDictionary.RemoveRemoves the element with the specified key from the DictionaryBase. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate propertyIDictionary.ValuesGets an ICollection object containing the values in the DictionaryBase object. (Inherited from DictionaryBase.)
Explicit interface implemetationPrivate methodIEnumerable.GetEnumeratorReturns an IEnumerator that iterates through the DictionaryBase. (Inherited from DictionaryBase.)
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The InstanceDataCollectionCollection class represents the collection returned from the ReadCategory method. This collection contains all the counter and instance data. The collection contains an InstanceDataCollection object for each counter. Each InstanceDataCollection object contains the performance data for all counters for that instance. Thus, the data is indexed by counter name and then by instance name.

The following code example displays the instance data for a particular PerformanceCounterCategory on the local computer. It first displays a numbered list of PerformanceCounterCategory names. After the user enters the number of one of the categories, the example gets the InstanceDataCollectionCollection for that PerformanceCounterCategory. It then converts the collection returned by the Values property to an array of InstanceDataCollection objects. The example displays the instance data associated with each InstanceData of each InstanceDataCollection.

Imports System
Imports System.Diagnostics
Imports System.Collections
Imports Microsoft.VisualBasic

Module InstDataKeysValuesMod

    Private categoryName As String 

    Sub Main()
        Dim catNumStr As String 
        Dim categoryNum As Integer 

        Dim categories As PerformanceCounterCategory() = _
            PerformanceCounterCategory.GetCategories()

        Console.WriteLine( _
            "These categories are registered on this computer:")

        Dim catX As Integer 
        For catX = 0 To categories.Length - 1
            Console.WriteLine("{0,4} - {1}", catX + 1, _
                categories(catX).CategoryName)
        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 = categories((categoryNum - 1)).CategoryName

        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 idColColKeys As ICollection = idColCol.Keys
        Dim idCCKeysArray(idColColKeys.Count - 1) As String
        idColColKeys.CopyTo(idCCKeysArray, 0)

        Dim idColColValues As ICollection = idColCol.Values
        Dim idCCValuesArray(idColColValues.Count - 1) As InstanceDataCollection
        idColColValues.CopyTo(idCCValuesArray, 0)

        Console.WriteLine("InstanceDataCollectionCollection for ""{0}"" " & _
            "has {1} elements.", categoryName, idColCol.Count)

        ' Display the InstanceDataCollectionCollection Keys and Values. 
        ' The Keys and Values collections have the same number of elements. 
        Dim index As Integer 
        For index = 0 To idCCKeysArray.Length - 1
            Console.WriteLine("  Next InstanceDataCollectionCollection " & _
                "Key is ""{0}""", idCCKeysArray(index))
            ProcessInstanceDataCollection(idCCValuesArray(index))
        Next index
    End Sub 

    ' Display the contents of an InstanceDataCollection. 
    Sub ProcessInstanceDataCollection(ByVal idCol As InstanceDataCollection)

        Dim idColKeys As ICollection = idCol.Keys
        Dim idColKeysArray(idColKeys.Count - 1) As String
        idColKeys.CopyTo(idColKeysArray, 0)

        Dim idColValues As ICollection = idCol.Values
        Dim idColValuesArray(idColValues.Count - 1) As InstanceData
        idColValues.CopyTo(idColValuesArray, 0)

        Console.WriteLine("  InstanceDataCollection for ""{0}"" " & _
            "has {1} elements.", idCol.CounterName, idCol.Count)

        ' Display the InstanceDataCollection Keys and Values. 
        ' The Keys and Values collections have the same number of elements. 
        Dim index As Integer 
        For index = 0 To idColKeysArray.Length - 1
            Console.WriteLine("    Next InstanceDataCollection " & _
                "Key is ""{0}""", idColKeysArray(index))
            ProcessInstanceDataObject(idColValuesArray(index))
        Next index
    End Sub 

    ' Display the contents of an InstanceData object. 
    Sub ProcessInstanceDataObject(ByVal instData As InstanceData)
        Dim sample As CounterSample = instData.Sample

        Console.WriteLine("    From InstanceData:" & vbCrLf & "      " & _
            "InstanceName: {0,-31} RawValue: {1}", _
            instData.InstanceName, instData.Sample.RawValue)
        Console.WriteLine("    From CounterSample:" & 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

.NET Framework

Supported in: 4.6, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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