Najlepszym sposobem na to, co znalazłem, zwłaszcza, że nie ma zbyt wielu informacji na ten temat, jest zachowanie istniejących wartości nieprzetworzonych, a następnie ponowne zastosowanie po usunięciu kategorii i ponownym utworzeniu. .
/// <summary>
/// When deleting the Category, need to preserve the existing counter values
/// </summary>
static Dictionary<string, long> GetPreservedValues(string category, XmlNodeList nodes)
{
Dictionary<string, long> preservedValues = new Dictionary<string, long>();
foreach (XmlNode counterNode in nodes)
{
string counterName = counterNode.Attributes["name"].Value;
if (PerformanceCounterCategory.CounterExists(counterName, category))
{
PerformanceCounter performanceCounter = new PerformanceCounter(category, counterName, false);
preservedValues.Add(counterName, performanceCounter.RawValue);
Console.WriteLine("Preserving {0} with a RawValue of {1}", counterName, performanceCounter.RawValue);
}
else
{
Console.WriteLine("Unable to preserve {0} because it doesn't exist", counterName);
}
}
return preservedValues;
}
/// <summary>
/// Restore preserved values after the category has been re-created
/// </summary>
static void SetPreservedValues(string category, Dictionary<string, long> preservedValues)
{
foreach (KeyValuePair<string, long> preservedValue in preservedValues)
{
PerformanceCounter performanceCounter = new PerformanceCounter(category, preservedValue.Key, false);
performanceCounter.RawValue = preservedValue.Value;
Console.WriteLine("Restoring {0} with a RawValue of {1}", preservedValue.Key, performanceCounter.RawValue);
}
}