V8引擎的样例。来源于ClearScript的github上的例子。
以下例子足以满足大部分需求。
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 | using System; using Microsoft.ClearScript; using Microsoft.ClearScript.JavaScript; using Microsoft.ClearScript.V8; // create a script engine using ( var engine = new V8ScriptEngine()) { // expose a host type engine.AddHostType( "Console" , typeof (Console)); engine.Execute( "Console.WriteLine('{0} is an interesting number.', Math.PI)" ); // expose a host object engine.AddHostObject( "random" , new Random()); engine.Execute( "Console.WriteLine(random.NextDouble())" ); // expose entire assemblies engine.AddHostObject( "lib" , new HostTypeCollection( "mscorlib" , "System.Core" )); engine.Execute( "Console.WriteLine(lib.System.DateTime.Now)" ); // create a host object from script engine.Execute( @" birthday = new lib.System.DateTime(2007, 5, 22); Console.WriteLine(birthday.ToLongDateString()); " ); // use a generic class from script engine.Execute( @" Dictionary = lib.System.Collections.Generic.Dictionary; dict = new Dictionary(lib.System.String, lib.System.Int32); dict.Add('foo', 123); " ); // call a host method with an output parameter engine.AddHostObject( "host" , new HostFunctions()); engine.Execute( @" intVar = host.newVar(lib.System.Int32); found = dict.TryGetValue('foo', intVar.out); Console.WriteLine('{0} {1}', found, intVar); " ); // create and populate a host array engine.Execute( @" numbers = host.newArr(lib.System.Int32, 20); for (var i = 0; i < numbers.Length; i++) { numbers[i] = i; } Console.WriteLine(lib.System.String.Join(', ', numbers)); " ); // create a script delegate engine.Execute( @" Filter = lib.System.Func(lib.System.Int32, lib.System.Boolean); oddFilter = new Filter(function(value) { return (value & 1) ? true : false; }); " ); // use LINQ from script engine.Execute( @" oddNumbers = numbers.Where(oddFilter); Console.WriteLine(lib.System.String.Join(', ', oddNumbers)); " ); // use a dynamic host object engine.Execute( @" expando = new lib.System.Dynamic.ExpandoObject(); expando.foo = 123; expando.bar = 'qux'; delete expando.foo; " ); // call a script function engine.Execute( "function print(x) { Console.WriteLine(x); }" ); engine.Script.print(DateTime.Now.DayOfWeek); // examine a script object engine.Execute( "person = { name: 'Fred', age: 5 }" ); Console.WriteLine(engine.Script.person.name); // read a JavaScript typed array engine.Execute( "values = new Int32Array([1, 2, 3, 4, 5])" ); var values = (ITypedArray< int >)engine.Script.values; Console.WriteLine( string .Join( ", " , values.ToArray())); } |