本文整理汇总了C#中System.Threading.Tasks.TaskFactory.ContinueWhenAll方法的典型用法代码示例。如果您正苦于以下问题：C# TaskFactory.ContinueWhenAll方法的具体用法？C# TaskFactory.ContinueWhenAll怎么用？C# TaskFactory.ContinueWhenAll使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Threading.Tasks.TaskFactory的用法示例。
在下文中一共展示了TaskFactory.ContinueWhenAll方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string[] filenames = { "chapter1.txt", "chapter2.txt",
"chapter3.txt", "chapter4.txt",
"chapter5.txt" };
string pattern = @"\b\w+\b";
var tasks = new List<Task>();
int totalWords = 0;
// Determine the number of words in each file.
foreach (var filename in filenames)
tasks.Add( Task.Factory.StartNew( fn => { if (! File.Exists(fn.ToString()))
throw new FileNotFoundException("{0} does not exist.", filename);
StreamReader sr = new StreamReader(fn.ToString());
String content = sr.ReadToEnd();
sr.Close();
int words = Regex.Matches(content, pattern).Count;
Interlocked.Add(ref totalWords, words);
Console.WriteLine("{0,-25} {1,6:N0} words", fn, words); },
filename));
var finalTask = Task.Factory.ContinueWhenAll(tasks.ToArray(), wordCountTasks => {
int nSuccessfulTasks = 0;
int nFailed = 0;
int nFileNotFound = 0;
foreach (var t in wordCountTasks) {
if (t.Status == TaskStatus.RanToCompletion)
nSuccessfulTasks++;
if (t.Status == TaskStatus.Faulted) {
nFailed++;
t.Exception.Handle( (e) => {
if (e is FileNotFoundException)
nFileNotFound++;
return true;
});
}
}
Console.WriteLine("\n{0,-25} {1,6} total words\n",
String.Format("{0} files", nSuccessfulTasks),
totalWords);
if (nFailed > 0) {
Console.WriteLine("{0} tasks failed for the following reasons:", nFailed);
Console.WriteLine(" File not found: {0}", nFileNotFound);
if (nFailed != nFileNotFound)
Console.WriteLine(" Other: {0}", nFailed - nFileNotFound);
}
});
finalTask.Wait();
}
}输出：
chapter2.txt 1,585 words chapter1.txt 4,012 words chapter5.txt 4,660 words chapter3.txt 7,481 words 4 files 17738 total words 1 tasks failed for the following reasons: File not found: 1
示例2: Main
//引入命名空间
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string[] filenames = { "chapter1.txt", "chapter2.txt",
"chapter3.txt", "chapter4.txt",
"chapter5.txt" };
string pattern = @"\b\w+\b";
var tasks = new List<Task>();
CancellationTokenSource source = new CancellationTokenSource();
CancellationToken token = source.Token;
int totalWords = 0;
// Determine the number of words in each file.
foreach (var filename in filenames)
tasks.Add( Task.Factory.StartNew( fn => { token.ThrowIfCancellationRequested();
if (! File.Exists(fn.ToString())) {
source.Cancel();
token.ThrowIfCancellationRequested();
}
StreamReader sr = new StreamReader(fn.ToString());
String content = sr.ReadToEnd();
sr.Close();
int words = Regex.Matches(content, pattern).Count;
Interlocked.Add(ref totalWords, words);
Console.WriteLine("{0,-25} {1,6:N0} words", fn, words); },
filename, token));
var finalTask = Task.Factory.ContinueWhenAll(tasks.ToArray(), wordCountTasks => {
if (! token.IsCancellationRequested)
Console.WriteLine("\n{0,-25} {1,6} total words\n",
String.Format("{0} files", wordCountTasks.Length),
totalWords);
}, token);
try {
finalTask.Wait();
}
catch (AggregateException ae) {
foreach (Exception inner in ae.InnerExceptions)
if (inner is TaskCanceledException)
Console.WriteLine("\nFailure to determine total word count: a task was cancelled.");
else
Console.WriteLine("\nFailure caused by {0}", inner.GetType().Name);
}
finally {
source.Dispose();
}
}
}输出：
chapter2.txt 1,585 words chapter1.txt 4,012 words Failure to determine total word count: a task was cancelled.