/// <summary>
/// 并行ForEach
/// </summary>
/// <param name="list"></param>
static void GetSomethingParallel(SomethingList list)
{
Parallel.ForEach(list.somethings, something =>
{
something.DoSomething();
Console.WriteLine(something.Name);
});
Console.WriteLine("GetSomethingParallel");
Console.WriteLine();
}
/// <summary>
/// 并行PLINQ.ForAll
/// </summary>
/// <param name="list"></param>
static void GetSomethingPlinq(SomethingList list)
{
list.somethings.AsParallel().ForAll(something =>
{
something.DoSomething();
Console.WriteLine(something.Name);
});
Console.WriteLine("GetSomethingPlinq");
Console.WriteLine();
}
/// <summary>
/// 小循环体的特殊处理
/// </summary>
/// <param name="list"></param>
static void GetSomethingSmallSet(SomethingList list)
{
var count = list.somethings.Count;
Double[] result = new Double[count];
Parallel.ForEach(Partitioner.Create(0, count, count / 2),
(range) =>
{
for (int i = range.Item1; i < range.Item2; i++)
{
result[i] = (Double)(Int32.Parse(list.somethings[i].ID));
Console.WriteLine(i + " : " + result[i]);
}
});
Console.WriteLine();
}
/// <summary>
/// 外部循环取消
/// </summary>
/// <param name="list"></param>
/// <param name="cts"></param>
static void DoGetSometingLoop(SomethingList list, CancellationTokenSource cts)
{
var count = list.somethings.Count;
CancellationToken token = cts.Token;
var options = new ParallelOptions
{
CancellationToken = token
};
try
{
Parallel.For(0, count, options, (i) =>
{
if (token.IsCancellationRequested)
{
Console.WriteLine("并行循环请求取消");
}
list.somethings[i].DoSomething();
Console.WriteLine(list.somethings[i].Name);
});
}
catch (OperationCanceledException ex)
{
Console.WriteLine("捕捉到OperationCanceledException异常");
}
Console.WriteLine("外部循环取消");
Console.WriteLine();
}
/// <summary>
/// 并行For停止
/// </summary>
/// <param name="list"></param>
static void GetSomethingStop(SomethingList list)
{
var count = list.somethings.Count;
var loopResult = Parallel.For(0, count, (i, loopState) =>
{
if (list.somethings[i].ID == "6")
{
loopState.Stop();
return;
}
list.somethings[i].DoSomething();
Console.WriteLine(list.somethings[i].Name);
});
if (!loopResult.IsCompleted &&
!loopResult.LowestBreakIteration.HasValue)
{
Console.WriteLine("并行循环停止");
}
Console.WriteLine();
}
static void Main(string[] args)
{
#region list对象
SomethingList list = new SomethingList()
{
somethings = new List<Something>{
new Something{
ID = "1",
Name = "some1"
},
new Something{
ID="2",
Name ="some2"
},
new Something{
ID="3",
Name="some3"
},
new Something{
ID="4",
Name="some4"
},
new Something{
ID="5",
Name="some5"
},
new Something{
ID="6",
Name="some6"
},
new Something{
ID="7",
Name="some7"
},
new Something{
ID="8",
Name="some8"
},
}
};
#endregion
// 并行发生无顺序
GetSomethingParallel(list);
GetSomethingPlinq(list);
GetSomethingBreak(list);
GetSomethingStop(list);
// 不知该如何调用:外部循环取消
// DoGetSometingLoop(SomethingList list, CancellationTokenSource cts)
GetSomethingSmallSet(list);
GetRandomNumber();
Console.ReadLine();
}
/// <summary>
/// 并行For中断
/// </summary>
/// <param name="list"></param>
static void GetSomethingBreak(SomethingList list)
{
var count = list.somethings.Count;
var loopResult = Parallel.For(0, count, (i, loopState) =>
{
if (list.somethings[i].ID == "5")
{
loopState.Break();
Console.WriteLine("并行中断,条件为ID=5");
return;
}
list.somethings[i].DoSomething();
Console.WriteLine(list.somethings[i].Name);
});
if (!loopResult.IsCompleted &&
loopResult.LowestBreakIteration.HasValue)
{
Console.WriteLine("当前并行循环在{0}处中断",
loopResult.LowestBreakIteration.Value);
}
Console.WriteLine();
}
