enterprisecounters.cs

用于c#.net数据库操作的类库。能把结婚集以数组的形成操作。

using System;
using System.Reflection;
using System.Collections;
using System.Diagnostics;

namespace EnterpriseObjects
{
	/// <summary>
	/// Summary description for Counters.
	/// </summary>
	public class EnterpriseCounters
	{
		// members...
		public string PerformanceObjectName = "MyEnterpriseApplication";
		private EnterpriseCounterCollection _counters = new EnterpriseCounterCollection();
		private ArrayList _counterCapableObjects = new ArrayList();

		public EnterpriseCounters()
		{
			//
			// TODO: Add constructor logic here
			//
		}

		public EnterpriseCounterCollection Counters
		{
			get
			{
				return _counters;
			}
		}

		public void ScanAssembly(object seedObject)
		{
			ScanAssembly(seedObject.GetType().Assembly);
		}

		public void ScanAssembly(Assembly scanAssembly)
		{
			// go through the types...
			foreach(Type scanType in scanAssembly.GetTypes())
			{
				// get the attributes...
				foreach(Type counterInterface in scanType.GetInterfaces())
				{
					// do we have one?
					if(counterInterface == typeof(ICounterProvider))
					{
						// create it...
						try
						{
							// call it and add it to the list...
							ICounterProvider targetObject = (ICounterProvider)Activator.CreateInstance(scanType);
							targetObject.CreateCounters(this);
							_counterCapableObjects.Add(targetObject);
						}
						catch
						{
						}
					}
				}
			}
		}

		public void CreateCounters()
		{
			CreateCounters(false);
		}

		public void CreateCounters(bool force)
		{
			// does the object exist?
			bool countersExist = PerformanceCounterCategory.Exists(PerformanceObjectName);

			// delete the category?
			if(countersExist == true && force == true)
			{
				PerformanceCounterCategory.Delete(PerformanceObjectName);
				countersExist = false;
			}

			// do we need to create it?
			if(countersExist == false)
			{
				// create a collection...
				CounterCreationDataCollection list = new CounterCreationDataCollection();

				// go through each counter...
				foreach(EnterpriseCounter counter in Counters)
				{
					// create some new data...
					CounterCreationData data = new CounterCreationData();
					data.CounterName = counter.Name;
					data.CounterHelp = counter.HelpText;
					data.CounterType = counter.Type;
					
					// add it...
					list.Add(data);
				}

				// create the category and all of the counters...
				PerformanceCounterCategory.Create(PerformanceObjectName, "", list);
			}

			// now, go back through the counters and create instances...
			foreach(EnterpriseCounter counter in Counters)
			{
				// create an instance and store it...
				counter.Counter = new PerformanceCounter(PerformanceObjectName, counter.Name, "", false);

				// reset the value...
				counter.Counter.RawValue = 0;
			}

			// ok, now tell all the objects that registered counters that they have been created...
			foreach(ICounterProvider counterObject in _counterCapableObjects)
				counterObject.CountersCreated(this);
	        _counterCapableObjects.Clear();
		}
	}
}