CounterCreationDataCollection Class
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CounterCreationDataCollection Class

 

Provides a strongly typed collection of CounterCreationData objects.

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

System.Object
  System.Collections.CollectionBase
    System.Diagnostics.CounterCreationDataCollection

<SerializableAttribute>
Public Class CounterCreationDataCollection
	Inherits CollectionBase

NameDescription
System_CAPS_pubmethodCounterCreationDataCollection()

Initializes a new instance of the CounterCreationDataCollection class, with no associated CounterCreationData instances.

System_CAPS_pubmethodCounterCreationDataCollection(CounterCreationData())

Initializes a new instance of the CounterCreationDataCollection class by using the specified array of CounterCreationData instances.

System_CAPS_pubmethodCounterCreationDataCollection(CounterCreationDataCollection)

Initializes a new instance of the CounterCreationDataCollection class by using the specified collection of CounterCreationData instances.

NameDescription
System_CAPS_pubpropertyCapacity

Gets or sets the number of elements that the CollectionBase can contain.(Inherited from CollectionBase.)

System_CAPS_pubpropertyCount

Gets the number of elements contained in the CollectionBase instance. This property cannot be overridden.(Inherited from CollectionBase.)

System_CAPS_protpropertyInnerList

Gets an ArrayList containing the list of elements in the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_pubpropertyItem(Int32)

Indexes the CounterCreationData collection.

System_CAPS_protpropertyList

Gets an IList containing the list of elements in the CollectionBase instance.(Inherited from CollectionBase.)

NameDescription
System_CAPS_pubmethodAdd(CounterCreationData)

Adds an instance of the CounterCreationData class to the collection.

System_CAPS_pubmethodAddRange(CounterCreationData())

Adds the specified array of CounterCreationData instances to the collection.

System_CAPS_pubmethodAddRange(CounterCreationDataCollection)

Adds the specified collection of CounterCreationData instances to the collection.

System_CAPS_pubmethodClear()

Removes all objects from the CollectionBase instance. This method cannot be overridden.(Inherited from CollectionBase.)

System_CAPS_pubmethodContains(CounterCreationData)

Determines whether a CounterCreationData instance exists in the collection.

System_CAPS_pubmethodCopyTo(CounterCreationData(), Int32)

Copies the elements of the CounterCreationData to an array, starting at the specified index of the array.

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetEnumerator()

Returns an enumerator that iterates through the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIndexOf(CounterCreationData)

Returns the index of a CounterCreationData object in the collection.

System_CAPS_pubmethodInsert(Int32, CounterCreationData)

Inserts a CounterCreationData object into the collection, at the specified index.

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_protmethodOnClear()

Performs additional custom processes when clearing the contents of the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnClearComplete()

Performs additional custom processes after clearing the contents of the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnInsert(Int32, Object)

Performs additional custom processes before inserting a new element into the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnInsertComplete(Int32, Object)

Performs additional custom processes after inserting a new element into the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnRemove(Int32, Object)

Performs additional custom processes when removing an element from the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnRemoveComplete(Int32, Object)

Performs additional custom processes after removing an element from the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnSet(Int32, Object, Object)

Performs additional custom processes before setting a value in the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnSetComplete(Int32, Object, Object)

Performs additional custom processes after setting a value in the CollectionBase instance.(Inherited from CollectionBase.)

System_CAPS_protmethodOnValidate(Object)

Checks the specified object to determine whether it is a valid CounterCreationData type.(Overrides CollectionBase.OnValidate(Object).)

System_CAPS_pubmethodRemove(CounterCreationData)

Removes a CounterCreationData object from the collection.

System_CAPS_pubmethodRemoveAt(Int32)

Removes the element at the specified index of the CollectionBase instance. This method is not overridable.(Inherited from CollectionBase.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethodICollection.CopyTo(Array, Int32)

Copies the entire CollectionBase to a compatible one-dimensional Array, starting at the specified index of the target array.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privmethodIList.Add(Object)

Adds an object to the end of the CollectionBase.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privmethodIList.Contains(Object)

Determines whether the CollectionBase contains a specific element.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privmethodIList.IndexOf(Object)

Searches for the specified Object and returns the zero-based index of the first occurrence within the entire CollectionBase.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privmethodIList.Insert(Int32, Object)

Inserts an element into the CollectionBase at the specified index.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privmethodIList.Remove(Object)

Removes the first occurrence of a specific object from the CollectionBase.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privpropertyICollection.IsSynchronized

Gets a value indicating whether access to the CollectionBase is synchronized (thread safe).(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privpropertyICollection.SyncRoot

Gets an object that can be used to synchronize access to the CollectionBase.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIList.IsFixedSize

Gets a value indicating whether the CollectionBase has a fixed size.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIList.IsReadOnly

Gets a value indicating whether the CollectionBase is read-only.(Inherited from CollectionBase.)

System_CAPS_pubinterfaceSystem_CAPS_privpropertyIList.Item(Int32)

Gets or sets the element at the specified index.(Inherited from CollectionBase.)

NameDescription
System_CAPS_pubmethodAsParallel()

Overloaded. Enables parallelization of a query.(Defined by ParallelEnumerable.)

System_CAPS_pubmethodAsQueryable()

Overloaded. Converts an IEnumerable to an IQueryable.(Defined by Queryable.)

System_CAPS_pubmethodCast(Of TResult)()

Casts the elements of an IEnumerable to the specified type.(Defined by Enumerable.)

System_CAPS_pubmethodOfType(Of TResult)()

Filters the elements of an IEnumerable based on a specified type.(Defined by Enumerable.)

The following example demonstrates how to use the CounterCreationDataCollection class. The example creates a new instance of the class and uses several methods to add statements to the collection, return their index, and add or remove attributes at a specific index point.

Imports System
Imports System.Collections
Imports System.Collections.Specialized
Imports System.Diagnostics

 _

Public Class App

    Private Shared avgCounter64Sample As PerformanceCounter
    Private Shared avgCounter64SampleBase As PerformanceCounter


    Public Shared Sub Main()

        Dim samplesList As New ArrayList()
        'If the category does not exist, create the category and exit.
        'Performance counters should not be created and immediately used.
        'There is a latency time to enable the counters, they should be created
        'prior to executing the application that uses the counters.
        'Execute this sample a second time to use the counters.
        If Not (SetupCategory()) Then
            CreateCounters()
            CollectSamples(samplesList)
            CalculateResults(samplesList)
        End If

    End Sub 'Main



    Private Shared Function SetupCategory() As Boolean
        If Not PerformanceCounterCategory.Exists("AverageCounter64SampleCategory") Then

            Dim counterDataCollection As New CounterCreationDataCollection()

            ' Add the counter.
            Dim averageCount64 As New CounterCreationData()
            averageCount64.CounterType = PerformanceCounterType.AverageCount64
            averageCount64.CounterName = "AverageCounter64Sample"
            counterDataCollection.Add(averageCount64)

            ' Add the base counter.
            Dim averageCount64Base As New CounterCreationData()
            averageCount64Base.CounterType = PerformanceCounterType.AverageBase
            averageCount64Base.CounterName = "AverageCounter64SampleBase"
            counterDataCollection.Add(averageCount64Base)

            ' Create the category.
            PerformanceCounterCategory.Create("AverageCounter64SampleCategory", _
               "Demonstrates usage of the AverageCounter64 performance counter type.", _
                      PerformanceCounterCategoryType.SingleInstance, counterDataCollection)


            Return True
        Else
            Console.WriteLine("Category exists - AverageCounter64SampleCategory")
            Return False
        End If
    End Function 'SetupCategory


    Private Shared Sub CreateCounters()
        ' Create the counters.

        avgCounter64Sample = New PerformanceCounter("AverageCounter64SampleCategory", "AverageCounter64Sample", False)

        avgCounter64SampleBase = New PerformanceCounter("AverageCounter64SampleCategory", "AverageCounter64SampleBase", False)


        avgCounter64Sample.RawValue = 0
        avgCounter64SampleBase.RawValue = 0
    End Sub 'CreateCounters

    Private Shared Sub CollectSamples(ByVal samplesList As ArrayList)

        Dim r As New Random(DateTime.Now.Millisecond)

        ' Loop for the samples.
        Dim j As Integer
        For j = 0 To 99

            Dim value As Integer = r.Next(1, 10)
            Console.Write(j.ToString() + " = " + value.ToString())

            avgCounter64Sample.IncrementBy(value)

            avgCounter64SampleBase.Increment()

            If j Mod 10 = 9 Then
                OutputSample(avgCounter64Sample.NextSample())
                samplesList.Add(avgCounter64Sample.NextSample())
            Else
                Console.WriteLine()
            End If
            System.Threading.Thread.Sleep(50)
        Next j
    End Sub 'CollectSamples

    Private Shared Sub CalculateResults(ByVal samplesList As ArrayList)
        Dim i As Integer
        For i = 0 To (samplesList.Count - 1) - 1
            ' Output the sample.
            OutputSample(CType(samplesList(i), CounterSample))
            OutputSample(CType(samplesList((i + 1)), CounterSample))

            ' Use .NET to calculate the counter value.
            Console.WriteLine(".NET computed counter value = " + CounterSampleCalculator.ComputeCounterValue(CType(samplesList(i), CounterSample), CType(samplesList((i + 1)), CounterSample)).ToString())

            ' Calculate the counter value manually.
            Console.WriteLine("My computed counter value = " + MyComputeCounterValue(CType(samplesList(i), CounterSample), CType(samplesList((i + 1)), CounterSample)).ToString())
        Next i
    End Sub 'CalculateResults




    '++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++
    '	Description - This counter type shows how many items are processed, on average,
    '		during an operation. Counters of this type display a ratio of the items 
    '		processed (such as bytes sent) to the number of operations completed. The  
    '		ratio is calculated by comparing the number of items processed during the 
    '		last interval to the number of operations completed during the last interval. 
    ' Generic type - Average
    '  	Formula - (N1 - N0) / (D1 - D0), where the numerator (N) represents the number 
    '		of items processed during the last sample interval and the denominator (D) 
    '		represents the number of operations completed during the last two sample 
    '		intervals. 
    '	Average (Nx - N0) / (Dx - D0)  
    '	Example PhysicalDisk\ Avg. Disk Bytes/Transfer 
    '++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++
    Private Shared Function MyComputeCounterValue(ByVal s0 As CounterSample, ByVal s1 As CounterSample) As [Single]
        Dim numerator As [Single] = CType(s1.RawValue, [Single]) - CType(s0.RawValue, [Single])
        Dim denomenator As [Single] = CType(s1.BaseValue, [Single]) - CType(s0.BaseValue, [Single])
        Dim counterValue As [Single] = numerator / denomenator
        Return counterValue
    End Function 'MyComputeCounterValue


    ' Output information about the counter sample.
    Private Shared Sub OutputSample(ByVal s As CounterSample)
        Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "+++++++++++")
        Console.WriteLine("Sample values - " + ControlChars.Lf + ControlChars.Cr)
        Console.WriteLine(("   BaseValue        = " + s.BaseValue.ToString()))
        Console.WriteLine(("   CounterFrequency = " + s.CounterFrequency.ToString()))
        Console.WriteLine(("   CounterTimeStamp = " + s.CounterTimeStamp.ToString()))
        Console.WriteLine(("   CounterType      = " + s.CounterType.ToString()))
        Console.WriteLine(("   RawValue         = " + s.RawValue.ToString()))
        Console.WriteLine(("   SystemFrequency  = " + s.SystemFrequency.ToString()))
        Console.WriteLine(("   TimeStamp        = " + s.TimeStamp.ToString()))
        Console.WriteLine(("   TimeStamp100nSec = " + s.TimeStamp100nSec.ToString()))
        Console.WriteLine("++++++++++++++++++++++")
    End Sub 'OutputSample
End Class 'App

.NET Framework
Available since 1.1

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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