C# Parallel并行遍历方法和执行任务
Parallel遍历分为For、ForEach,支持Lamda表达式,执行并行任务使用Invoke。
控制台示例程序:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace MyParallel
{
/// <summary>
/// Parallel.For()和Paraller.ForEach()方法在每次迭代中调用相同的代码,而Parallel.Invoke()方法允许同时调用不同的方法。Parallel.ForEach()用于数据并行性,Parallel.Invoke()用于任务并行性;
/// </summary>
class Program
{
/// <summary>
/// 并行运行方法-Parallel.For-遍历顺序不定
/// </summary>
/// <param name="args"></param>
static void Main0(string[] args)
{
ParallelLoopResult result = Parallel.For(0, 10, i =>
{
Console.WriteLine("迭代次数:{0},任务ID:{1},线程ID:{2}", i, Task.CurrentId, Thread.CurrentThread.ManagedThreadId);
Thread.Sleep(10);
});
Console.WriteLine("是否完成:{0}", result.IsCompleted);
Console.WriteLine("最低迭代:{0}", result.LowestBreakIteration);
Console.Read();
}
/// <summary>
/// 并行运行方法-Parallel.For-遍历顺序不定
/// </summary>
/// <param name="args"></param>
static void Main1(string[] args)
{
ParallelLoopResult result = Parallel.For(0, 10, (i, state) =>
{
Console.WriteLine("迭代次数:{0},任务ID:{1},线程ID:{2}", i, Task.CurrentId, Thread.CurrentThread.ManagedThreadId);
Thread.Sleep(10);
if (i > 5)
state.Break();
});
Console.WriteLine("是否完成:{0}", result.IsCompleted);
Console.WriteLine("最低迭代:{0}", result.LowestBreakIteration);
Console.Read();
}
/// <summary>
/// 并行运行方法-Parallel.ForEach-遍历顺序不定
/// </summary>
/// <param name="args"></param>
static void Main2(string[] args)
{
string[] data = { "str1", "str2", "str3" };
ParallelLoopResult result = Parallel.ForEach<string>(data, str =>
{
Console.WriteLine(str);
});
Console.WriteLine("是否完成:{0}", result.IsCompleted);
Console.WriteLine("最低迭代:{0}", result.LowestBreakIteration);
Console.Read();
}
/// <summary>
/// 并行运行方法-Parallel.ForEach-遍历顺序不定
/// </summary>
/// <param name="args"></param>
static void Main3(string[] args)
{
string[] data = { "str1", "str2", "str3", "str4", "str5" };
ParallelLoopResult result = Parallel.ForEach<string>(data, (str, state, i) =>
{
Console.WriteLine("迭代次数:{0},{1}", i, str);
if (i > 3)
state.Break();
});
Console.WriteLine("是否完成:{0}", result.IsCompleted);
Console.WriteLine("最低迭代:{0}", result.LowestBreakIteration);
Console.Read();
}
/// <summary>
/// 并行运行方法-Parallel.Invoke-并行任务执行无先后顺序
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Parallel.Invoke(() =>
{
Thread.Sleep(100);
Console.WriteLine("method1");
}, () =>
{
Thread.Sleep(10);
Console.WriteLine("method2");
});
Console.Read();
}
}
}
我的示例:
ParallelLoopResult result= Parallel.ForEach(sims, (sim) =>
{
m_list_sim_channel.Add(new SimChannel(sim, (byte)new Random().Next(37)));
});
while (true)
{
if (result.IsCompleted)
{
Console.WriteLine("m_list_sim_channel count=" + m_list_sim_channel.Count);
break;
}
}
纸上得来终觉浅,绝知此事要躬行。