C#5.0 .net 4.5示例
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 | //filename: MathOperations.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace TestAsyncAwait { public class MathOperations { public static double MultiplyByTwo( double d) { return d * 2; } public static double Square( double d) { return d * d; } } } //filename: MyClass.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace TestAsyncAwait { public class MyClass { public MyClass() { //DisplayValue(); DisplayValueWithContinuationTask(); Console.WriteLine( "MyClass() end." ); } public Task< double > GetValueAsync( double num1, double num2) { return Task.Run< double >(() => { Thread.Sleep(1000); return num1 + num2; }); } public async void DisplayValue() { double result = await GetValueAsync(1, 2); Console.WriteLine( "result is :" + result); } public void DisplayValueWithContinuationTask() { Task< double > task = GetValueAsync(1, 2); task.ContinueWith(t => { double result = t.Result; Console.WriteLine( "result is :" + result); }); } } } //filename: Program.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace TestAsyncAwait { class Program { public static Tuple< int , int > Divide( int dividend, int divisor) { int result = dividend / divisor; int reminder = dividend % divisor; return Tuple.Create< int , int >(result, reminder); } private delegate string GetAString(); static void ProcessAndDispalyNumber(Func< double , double > action, double value){ double result = action(value); Console.WriteLine( string .Format( "value={0},result={1}" , value, result)); } #region 异步编程实验 static string Greeting( string name) { Thread.Sleep(3000); return string .Format( "threadID:[{0}] says: Hello, {1}!" , Thread.CurrentThread.ManagedThreadId, name); } static Task< string > GreetingAsync( string name) { return Task.Run< string >(() => { return Greeting(name); }); } async static void CallerWithAsync() { string result = await GreetingAsync( "张三" ); Console.WriteLine(result); } static void CallerWithContinuationWith() { Task< string > task = GreetingAsync( "张三" ); task.ContinueWith(t => { string result = t.Result; Console.WriteLine(result); }); } async static void MultipleAsyncMethods() { string result1 = await GreetingAsync( "张三@" ); string result2 = await GreetingAsync( "李四@" ); Console.WriteLine( "Finished with 2 result: {0},{1}" , result1, result2); } async static void MultipleAsyncMethodsWithCombinators1() { Task< string > t1 = GreetingAsync( "张三1" ); Task< string > t2 = GreetingAsync( "李四1" ); await Task.WhenAll(t1, t2); Console.WriteLine( "Finished with 2 result: {0},{1}" , t1.Result, t2.Result); } async static void MultipleAsyncMethodsWithCombinators2() { Task< string > t1 = GreetingAsync( "张三2" ); Task< string > t2 = GreetingAsync( "李四2" ); string [] result = await Task.WhenAll(t1, t2); Console.WriteLine( "Finished with 2 result: {0},{1}" , result[0], result[1]); } #endregion static void Main( string [] args) { /* CallerWithAsync(); CallerWithContinuationWith(); MultipleAsyncMethods(); MultipleAsyncMethodsWithCombinators1(); MultipleAsyncMethodsWithCombinators2(); Console.WriteLine(Thread.CurrentThread.ManagedThreadId + ": Done."); */ ParallelLoopResult result = Parallel.For(0, 10, async i => { Console.WriteLine( "{0}, task: {1}, thread: {2}" , i, Task.CurrentId, Thread.CurrentThread.ManagedThreadId); //Thread.Sleep(10); await Task.Delay(10); Console.WriteLine( "{0}, task: {1}, thread: {2}" , i, Task.CurrentId, Thread.CurrentThread.ManagedThreadId); }); Console.WriteLine( "Is completed: {0}" , result.IsCompleted); /* MyClass mc = new MyClass(); Console.WriteLine("-----------------"); var result = Divide(5, 2); Console.WriteLine(string.Format("result={0},reminder={1}",result.Item1, result.Item2)); int x = 4; //GetAString func = new GetAString(x.ToString); GetAString func = x.ToString; Console.WriteLine(func()); Console.WriteLine(func.Invoke()); Func<double, double>[] operations = { MathOperations.MultiplyByTwo, MathOperations.Square }; foreach (var item in operations) { ProcessAndDispalyNumber(item, 3.14); } string midPart = ", middle part,"; Func<string, string> anonDel = delegate(string value) { string s = value + midPart; s += " last part"; return s; }; Console.WriteLine(anonDel("Hello")); Func<string, string> anonDel2 = (string value) => { string s = value + midPart; s += " last part. version 2"; return s; }; Console.WriteLine(anonDel2("Hello")); Func<string, string> anonDel3 = value => { string s = value + midPart; s += " last part. version 3"; return s; }; Console.WriteLine(anonDel3("Hello")); int someValue = 5; Func<int, int> f = p1 => p1 + someValue; Console.WriteLine(f(1)); someValue = 6; Console.WriteLine(f(1)); //var lists = new List<string>() { "1","2"}; dynamic dyn; dyn = 100; Console.WriteLine(dyn.GetType()); Console.WriteLine(dyn); dyn = "abc中国"; Console.WriteLine(dyn.GetType()); Console.WriteLine(dyn); */ Console.ReadKey(); } } } |
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