簡略完成C#異步操作。本站提示廣大學習愛好者：（簡略完成C#異步操作）文章只能為提供參考，不一定能成為您想要的結果。以下是簡略完成C#異步操作正文
在.net4.0今後異步操作,並行盤算變得異常簡略,然則因為公司項目開辟基於.net3.5所以沒法用到4.0的並行盤算和Task等異步編程。是以,為了今後更便利的停止異步方法的開辟,我封裝完成了異步編程框架,經由過程BeginInvoke、EndInvoke的方法完成異步編程。
1、框架構造
全部框架包含四個部門
1、基類籠統Opeartor
我把每一個異步履行進程稱為一個Operate,是以須要一個Opeartor去履行
2、FuncAsync
異步的Func
3、ActionAsync
異步的Action
4、Asynchorus
對ActionAsync和FuncAsync的封裝
Operator
Operator是一個籠統類,完成了IOperationAsync和IContinueWithAsync兩個接口。
IOperationAsync完成了異步操作,IContinueWithAsync完成了相似於Task的ContinueWith辦法,在以後異步操作完成後持續停止的操作
IOperationAsync接口詳解
public interface IOperationAsync
{
IAsyncResult Invoke();
void Wait();
void CompletedCallBack(IAsyncResult ar);
void CatchException(Exception exception);
}
IContinueWithAsync接口概況
public interface IContinueWithAsync
{
Operator Previous { get; set; }
Operator Next { get; set; }
Operator ContinueWithAsync(Action action);
Operator ContinueWithAsync<TParameter>(Action<TParameter> action, TParameter parameter);
}
Previous:前一個操作
Next:下一個操作
ContinueWithAsync():異步持續操作
public abstract class Operator : IOperationAsync, IContinueWithAsync
{
public IAsyncResult Middle;
public readonly string Id;
public Exception Exception { get; private set; }
public Operator Previous { get; set; }
public Operator Next { get; set; }
protected Operator()
{
Id = Guid.NewGuid().ToString();
}
public abstract IAsyncResult Invoke();
protected void SetAsyncResult(IAsyncResult result)
{
this.Middle = result;
}
public virtual void Wait()
{
if (!Middle.IsCompleted) Middle.AsyncWaitHandle.WaitOne();
}
public virtual void CompletedCallBack(IAsyncResult ar)
{
}
public void CatchException(Exception exception)
{
this.Exception = exception;
}
protected Operator ContinueAsync()
{
if (Next != null) Next.Invoke();
return Next;
}
public virtual Operator ContinueWithAsync(Action action)
{
Next = new ActionAsync(action);
Next.Previous = this;
return Next;
}
public virtual Operator ContinueWithAsync<TParameter>(Action<TParameter> action, TParameter parameter)
{
Next = new ActionAsync<TParameter>(action, parameter);
Next.Previous = this;
return Next;
}
public virtual Operator ContinueWithAsync<TResult>(Func<TResult> func)
{
Next = new FuncAsync<TResult>();
Next.Previous = this;
return Next;
}
public virtual Operator ContinueWithAsync<TParameter, TResult>(Func<TParameter, TResult> func,
TParameter parameter)
{
Next = new FuncAsync<TParameter, TResult>(func, parameter);
Next.Previous = this;
return Next;
}
}
無前往異步操作
ActionAsync
public class ActionAsync : Operator
{
private readonly Action _action;
protected ActionAsync()
{
}
public ActionAsync(Action action)
: this()
{
this._action = action;
}
public override IAsyncResult Invoke()
{
var middle = _action.BeginInvoke(CompletedCallBack, null);
SetAsyncResult(middle);
return middle;
}
public override void CompletedCallBack(IAsyncResult ar)
{
try
{
_action.EndInvoke(ar);
}
catch (Exception exception)
{
this.CatchException(exception);
}
ContinueAsync();
}
}
public class ActionAsync<T> : ActionAsync
{
public T Result;
private readonly Action<T> _action1;
protected readonly T Parameter1;
public ActionAsync()
{
}
public ActionAsync(T parameter)
{
this.Parameter1 = parameter;
}
public ActionAsync(Action<T> action, T parameter)
{
this._action1 = action;
this.Parameter1 = parameter;
}
public override IAsyncResult Invoke()
{
var result = _action1.BeginInvoke(Parameter1, CompletedCallBack, null);
SetAsyncResult(result);
return result;
}
public override void CompletedCallBack(IAsyncResult ar)
{
try
{
_action1.EndInvoke(ar);
}
catch (Exception exception)
{
this.CatchException(exception);
}
ContinueAsync();
}
}
有前往異步
FuncAsync完成了IFuncOperationAsync接口
IFuncOperationAsync
public interface IFuncOperationAsync<T>
{
void SetResult(T result);
T GetResult();
}
1）、FuncAsync
public class FuncAsync<TResult> : Operator, IFuncOperationAsync<TResult>
{
private TResult _result;
public TResult Result
{
get
{
if (!Middle.IsCompleted || _result == null)
{
_result = GetResult();
}
return _result;
}
}
private readonly Func<TResult> _func1;
public FuncAsync()
{
}
public FuncAsync(Func<TResult> func)
{
this._func1 = func;
}
public override IAsyncResult Invoke()
{
var result = _func1.BeginInvoke(CompletedCallBack, null);
SetAsyncResult(result);
return result;
}
public override void CompletedCallBack(IAsyncResult ar)
{
try
{
var result = _func1.EndInvoke(ar);
SetResult(result);
}
catch (Exception exception)
{
this.CatchException(exception);
SetResult(default(TResult));
}
ContinueAsync();
}
public virtual TResult GetResult()
{
Wait();
return this._result;
}
public void SetResult(TResult result)
{
_result = result;
}
}
public class FuncAsync<T1, TResult> : FuncAsync<TResult>
{
protected readonly T1 Parameter1;
private readonly Func<T1, TResult> _func2;
public FuncAsync(Func<T1, TResult> action, T1 parameter1)
: this(parameter1)
{
this._func2 = action;
}
protected FuncAsync(T1 parameter1)
: base()
{
this.Parameter1 = parameter1;
}
public override IAsyncResult Invoke()
{
var result = _func2.BeginInvoke(Parameter1, CompletedCallBack, null);
SetAsyncResult(result);
return result;
}
public override void CompletedCallBack(IAsyncResult ar)
{
try
{
var result = _func2.EndInvoke(ar);
SetResult(result);
}
catch (Exception exception)
{
CatchException(exception);
SetResult(default(TResult));
}
ContinueAsync();
}
}
Asynchronous 異步操作封裝
ActionAsync和FuncAsync為異步操作打下了基本,接上去最主要的任務就是經由過程這兩個類履行我們的異步操作,為此我封裝了一個異步操作類
重要封裝了以下幾個部門：
前面四個包括若干個重載,這裡只是籠統的代表一個類型的辦法
WaitAll
public static void WaitAll(IEnumerable<Operator> operations)
{
foreach (var @operator in operations)
{
@operator.Wait();
}
}
WaitAny
public static void WaitAny(IEnumerable<Operator> operations)
{
while (operations.All(o => !o.Middle.IsCompleted))
Thread.Sleep(100);
}
期待時光可以自界說
ActionInvoke
public static Operator Invoke(Action action)
{
Operator operation = new ActionAsync(action);
operation.Invoke();
return operation;
}
public static Operator Invoke<T>(Action<T> action, T parameter)
{
Operator operation = new ActionAsync<T>(action, parameter);
operation.Invoke();
return operation;
}
public static Operator Invoke<T1, T2>(Action<T1, T2> action, T1 parameter1, T2 parameter2)
{
Operator operation = new ActionAsync<T1, T2>(action, parameter1, parameter2);
operation.Invoke();
return operation;
}
FuncInvoke
public static Operator Invoke<TResult>(Func<TResult> func)
{
Operator operation = new FuncAsync<TResult>(func);
operation.Invoke();
return operation;
}
public static Operator Invoke<TParameter, TResult>(Func<TParameter, TResult> func, TParameter parameter)
{
TParameter param = parameter;
Operator operation = new FuncAsync<TParameter, TResult>(func, param);
operation.Invoke();
return operation;
}
public static Operator Invoke<T1, T2, TResult>(Func<T1, T2, TResult> func, T1 parameter1, T2 parameter2)
{
Operator operation = new FuncAsync<T1, T2, TResult>(func, parameter1, parameter2);
operation.Invoke();
return operation;
}
ContinueWithAction
public static Operator ContinueWithAsync(IEnumerable<Operator>operators, Action action)
{
return Invoke(WaitAll, operators)
.ContinueWithAsync(action);
}
public static Operator ContinueWithAsync<TParameter>(IEnumerable<Operator> operators, Action<TParameter> action, TParameter parameter)
{
return Invoke(WaitAll, operators)
.ContinueWithAsync(action, parameter);
}
ContinueWithFunc
public static Operator ContinueWithAsync<TResult>(IEnumerable<Operator> operators,Func<TResult> func)
{
return Invoke(WaitAll, operators)
.ContinueWithAsync(func);
}
public static Operator ContinueWithAsync<TParameter, TResult>(IEnumerable<Operator> operators,
Func<TParameter, TResult> func, TParameter parameter)
{
return Invoke(WaitAll, operators)
.ContinueWithAsync(func, parameter);
}
這裡有個bug當挪用ContinueWithAsync後沒法挪用Wait期待,原來Wait須要早年往後期待每一個異步操作,然則測試了下不相符預期成果。不外實際下去說應當無需如許操作,ContinueWithAsync只是為了當上一個異步操作履行終了時持續履行的異步操作,若要期待,那不如兩個操作放到一路,最初再期待仍然可以完成。
後面的都是單步異步操作的挪用,若須要對某聚集停止某個辦法的異步操作,可以foreach遍歷
public void ForeachAsync(IEnumerbale<string> parameters)
{
foreach(string p in parameters)
{
Asynchronous.Invoke(Tast,p);
}
}
public void Test(string parameter)
{
//TODO:做一些事
}
每次都須要去手寫foreach,比擬費事,是以完成相似於PLinq的並行盤算辦法其實有需要,不外有一點差異,PLinq是采取多核CPU停止並行盤算,而我封裝的僅僅遍歷聚集停止異步操作罷了
ForeachAction
public static IEnumerable<Operator> Foreach<TParameter>(IEnumerable<TParameter> items, Action<TParameter> action)
{
return items.Select(t => Invoke(action, t)).ToList();
}
ForeachFunc
public static IEnumerable<Operator> Foreach<TParameter, TResult>(IEnumerable<TParameter> items, Func<TParameter, TResult> func)
{
return items.Select(parameter => Invoke(func, parameter)).ToList();
}
若何應用
無前往值異步辦法挪用
public void DoSomeThing()
{
//TODO:
}
經由過程Asynchronous.Invoke(DoSomeThing) 履行
public void DoSomeThing(string parameter)
{
//TODO:
}
經由過程Asynchronous.Invoke(DoSomeThing,parameter) 履行
有前往值異步辦法挪用
public string DoSomeThing()
{
//TODO:
}
經由過程Asynchronous.Invoke(()=>DoSomeThing())履行
public string DoSomeThing(string parameter)
{
//TODO:
}
經由過程Asynchronous.Invoke(()=>DoSomeThing(parameter))履行,或許也能夠傳入參數經由過程Asynchronous.Invoke(p=>DoSomeThing(p),parameter)
無前往值Foreach
public void Test
{
int[] parameters = {1,2,3,4,5};
Asynchronous.Foreach(parameters,Console.WriteLine);
}
有前往值Foreach
public void Test
{
int[] parameters = {1,2,3,4,5};
var operators = Asynchronous.Foreach(parameters,p=> p*2);
Asynchrous.WaitAll(operators);
Asynchronous.Foreach(operators.Cast<FuncAsync<int,int>>(),
p=> Console.WriteLine(p.Result));
}
起首將聚集每一個值擴展2倍,然後輸入
異步履行完再履行
public void Test
{
int[] parameters = {1,2,3,4,5};
var operators = Asynchronous.Foreach(parameters,p=> p*2);
Asynchrous.ContinueWithAsync(operators,Console.WriteLine,"履行完成");
}
每次履行完持續履行
能夠有時刻我們須要遍歷一個聚集,每一個元素處置完成後我們須要輸入XX處置完成
public void Test
{
int[] parameters = {1,2,3,4,5};
var operators = Asynchronous.Foreach(parameters,p=> p*2);
Asynchronous.Foreach(operators,o=>{
o.ContinueWithAsync(()={
//每一個元素履行完時履行
if(o.Exception != null)
{
//之前履行時發生未處置的異常,這裡可以捕捉到
}
});
});
}
可以完成鏈式異步操作
public void Chain()
{
Asynchronous.Invoke(Console.WriteLine,1)
.ContinueWithAsync(Console.WriteLine,2)
.ContinueWithAsync(Console.WriteLine,3)
}
如許會按步調輸入1,2,3
停止語
以上只是列出了部門重載辦法，其他重載辦法不過就是加參數，實質現實是一樣的。
願望對年夜家的進修有所贊助，在這祝年夜家新年快活，新的一年年夜家一路盡力。
