CounterCreationData Class
Defines the counter type, name, and Help string for a custom counter.
Assembly: System (in System.dll)
| Name | Description | |
|---|---|---|
![]() | CounterCreationData() | Initializes a new instance of the CounterCreationData class, to a counter of type NumberOfItems32, and with empty name and help strings. |
![]() | CounterCreationData(String^, String^, PerformanceCounterType) | Initializes a new instance of the CounterCreationData class, to a counter of the specified type, using the specified counter name and Help strings. |
| Name | Description | |
|---|---|---|
![]() | CounterHelp | Gets or sets the custom counter's description. |
![]() | CounterName | Gets or sets the name of the custom counter. |
![]() | CounterType | Gets or sets the performance counter type of the custom counter. |
| Name | Description | |
|---|---|---|
![]() | 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.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
The following code example demonstrates how to use the CounterCreationData class to define custom counters. This example creates counters that display how many items are processed in an operation. The example initializes the counters, collects information from them, and then calculates and displays the results to the console.
#using <System.dll> using namespace System; using namespace System::Collections; using namespace System::Collections::Specialized; using namespace System::Diagnostics; // Output information about the counter sample. void OutputSample( CounterSample s ) { Console::WriteLine( "\r\n+++++++++++" ); Console::WriteLine( "Sample values - \r\n" ); Console::WriteLine( " BaseValue = {0}", s.BaseValue ); Console::WriteLine( " CounterFrequency = {0}", s.CounterFrequency ); Console::WriteLine( " CounterTimeStamp = {0}", s.CounterTimeStamp ); Console::WriteLine( " CounterType = {0}", s.CounterType ); Console::WriteLine( " RawValue = {0}", s.RawValue ); Console::WriteLine( " SystemFrequency = {0}", s.SystemFrequency ); Console::WriteLine( " TimeStamp = {0}", s.TimeStamp ); Console::WriteLine( " TimeStamp100nSec = {0}", s.TimeStamp100nSec ); Console::WriteLine( "++++++++++++++++++++++" ); } //++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++ // 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 //++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++//++++++++ float MyComputeCounterValue( CounterSample s0, CounterSample s1 ) { float numerator = (float)s1.RawValue - (float)s0.RawValue; float denomenator = (float)s1.BaseValue - (float)s0.BaseValue; float counterValue = numerator / denomenator; return counterValue; } bool SetupCategory() { if ( !PerformanceCounterCategory::Exists( "AverageCounter64SampleCategory" ) ) { CounterCreationDataCollection^ CCDC = gcnew CounterCreationDataCollection; // Add the counter. CounterCreationData^ averageCount64 = gcnew CounterCreationData; averageCount64->CounterType = PerformanceCounterType::AverageCount64; averageCount64->CounterName = "AverageCounter64Sample"; CCDC->Add( averageCount64 ); // Add the base counter. CounterCreationData^ averageCount64Base = gcnew CounterCreationData; averageCount64Base->CounterType = PerformanceCounterType::AverageBase; averageCount64Base->CounterName = "AverageCounter64SampleBase"; CCDC->Add( averageCount64Base ); // Create the category. PerformanceCounterCategory::Create( "AverageCounter64SampleCategory", "Demonstrates usage of the AverageCounter64 performance counter type.", CCDC ); return (true); } else { Console::WriteLine( "Category exists - AverageCounter64SampleCategory" ); return (false); } } void CreateCounters( PerformanceCounter^% PC, PerformanceCounter^% BPC ) { // Create the counters. PC = gcnew PerformanceCounter( "AverageCounter64SampleCategory","AverageCounter64Sample",false ); BPC = gcnew PerformanceCounter( "AverageCounter64SampleCategory","AverageCounter64SampleBase",false ); PC->RawValue = 0; BPC->RawValue = 0; } void CollectSamples( ArrayList^ samplesList, PerformanceCounter^ PC, PerformanceCounter^ BPC ) { Random^ r = gcnew Random( DateTime::Now.Millisecond ); // Loop for the samples. for ( int j = 0; j < 100; j++ ) { int value = r->Next( 1, 10 ); Console::Write( "{0} = {1}", j, value ); PC->IncrementBy( value ); BPC->Increment(); if ( (j % 10) == 9 ) { OutputSample( PC->NextSample() ); samplesList->Add( PC->NextSample() ); } else Console::WriteLine(); System::Threading::Thread::Sleep( 50 ); } } void CalculateResults( ArrayList^ samplesList ) { for ( int i = 0; i < (samplesList->Count - 1); i++ ) { // Output the sample. OutputSample( *safe_cast<CounterSample^>(samplesList[ i ]) ); OutputSample( *safe_cast<CounterSample^>(samplesList[ i + 1 ]) ); // Use .NET to calculate the counter value. Console::WriteLine( ".NET computed counter value = {0}", CounterSampleCalculator::ComputeCounterValue( *safe_cast<CounterSample^>(samplesList[ i ]), *safe_cast<CounterSample^>(samplesList[ i + 1 ]) ) ); // Calculate the counter value manually. Console::WriteLine( "My computed counter value = {0}", MyComputeCounterValue( *safe_cast<CounterSample^>(samplesList[ i ]), *safe_cast<CounterSample^>(samplesList[ i + 1 ]) ) ); } } int main() { ArrayList^ samplesList = gcnew ArrayList; PerformanceCounter^ PC; PerformanceCounter^ BPC; SetupCategory(); CreateCounters( PC, BPC ); CollectSamples( samplesList, PC, BPC ); CalculateResults( samplesList ); }
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.


