InstanceDataCollection Class
Provides a strongly typed collection of InstanceData objects.
Assembly: System (in System.dll)
| Name | Description | |
|---|---|---|
![]() | InstanceDataCollection(String) | Obsolete. Initializes a new instance of the InstanceDataCollection class, using the specified performance counter (which defines a performance instance). |
| Name | Description | |
|---|---|---|
![]() | Count | Gets the number of elements contained in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | CounterName | Gets the name of the performance counter whose instance data you want to get. |
![]() | Dictionary | Gets the list of elements contained in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | InnerHashtable | Gets the list of elements contained in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | Item(String) | Gets the instance data associated with this counter. This is typically a set of raw counter values. |
![]() | Keys | Gets the object and counter registry keys for the objects associated with this instance data. |
![]() | Values | Gets the raw counter values that comprise the instance data for the counter. |
| Name | Description | |
|---|---|---|
![]() | Clear() | Clears the contents of the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | Contains(String) | Determines whether a performance instance with a specified name (identified by one of the indexed InstanceData objects) exists in the collection. |
![]() | CopyTo(Array, Int32) | Copies the DictionaryBase elements to a one-dimensional Array at the specified index.(Inherited from DictionaryBase.) |
![]() | CopyTo(InstanceData(), Int32) | Copies the items in the collection to the specified one-dimensional array at the specified index. |
![]() | Equals(Object) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | GetEnumerator() | Returns an IDictionaryEnumerator that iterates through the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | OnClear() | Performs additional custom processes before clearing the contents of the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnClearComplete() | Performs additional custom processes after clearing the contents of the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnGet(Object, Object) | Gets the element with the specified key and value in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnInsert(Object, Object) | Performs additional custom processes before inserting a new element into the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnInsertComplete(Object, Object) | Performs additional custom processes after inserting a new element into the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnRemove(Object, Object) | Performs additional custom processes before removing an element from the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnRemoveComplete(Object, Object) | Performs additional custom processes after removing an element from the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnSet(Object, Object, Object) | Performs additional custom processes before setting a value in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnSetComplete(Object, Object, Object) | Performs additional custom processes after setting a value in the DictionaryBase instance.(Inherited from DictionaryBase.) |
![]() | OnValidate(Object, Object) | Performs additional custom processes when validating the element with the specified key and value.(Inherited from DictionaryBase.) |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | IDictionary.Add(Object, Object) | Adds an element with the specified key and value into the DictionaryBase.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.Contains(Object) | Determines whether the DictionaryBase contains a specific key.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.Remove(Object) | Removes the element with the specified key from the DictionaryBase.(Inherited from DictionaryBase.) |
![]() ![]() | IEnumerable.GetEnumerator() | Returns an IEnumerator that iterates through the DictionaryBase.(Inherited from DictionaryBase.) |
![]() ![]() | ICollection.IsSynchronized | Gets a value indicating whether access to a DictionaryBase object is synchronized (thread safe).(Inherited from DictionaryBase.) |
![]() ![]() | ICollection.SyncRoot | Gets an object that can be used to synchronize access to a DictionaryBase object.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.IsFixedSize | Gets a value indicating whether a DictionaryBase object has a fixed size.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.IsReadOnly | Gets a value indicating whether a DictionaryBase object is read-only.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.Item(Object) | Gets or sets the value associated with the specified key.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.Keys | Gets an ICollection object containing the keys in the DictionaryBase object.(Inherited from DictionaryBase.) |
![]() ![]() | IDictionary.Values | Gets an ICollection object containing the values in the DictionaryBase object.(Inherited from DictionaryBase.) |
| Name | Description | |
|---|---|---|
![]() | AsParallel() | Overloaded. Enables parallelization of a query.(Defined by ParallelEnumerable.) |
![]() | AsQueryable() | Overloaded. Converts an IEnumerable to an IQueryable.(Defined by Queryable.) |
![]() | Cast(Of TResult)() | Casts the elements of an IEnumerable to the specified type.(Defined by Enumerable.) |
![]() | OfType(Of TResult)() | Filters the elements of an IEnumerable based on a specified type.(Defined by Enumerable.) |
The InstanceDataCollection class represents a collection containing all the instance data for a counter. This collection is contained in the InstanceDataCollectionCollection when using the ReadCategory method.
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 Values to an array of InstanceDataCollection objects. The example also 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
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.






