C#执行Javascript代码的几种方法总结

一、开源项目 Javascript .NET

地址： http://javascriptdotnet.codeplex.com/ 它是Google Chrome V8引擎在.NET上的封装，功能完善，性能相对较高，推荐使用! (缺点就是asp.net web应用上，好象会报错)

示例代码：

复制代码代码如下:

using Noesis.Javascript; 
using System; 
using System.Collections.Generic; 

namespace JsCSharp 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            using (JavascriptContext ctx = new JavascriptContext()) 
            { 
                var i = ctx.Run("1+2"); 
                Console.WriteLine(i);//3 
                ctx.Run("var d = new Date(2013,9-1,2,20,30,15)"); 
                var d = ctx.GetParameter("d"); 
                Console.WriteLine(d);//2013/9/2 20:30:15 
                var j = ctx.Run("function add(x,y){return x+y;};add(5,10);"); 
                Console.WriteLine(j);//15 
                ctx.Run("var obj = {};obj.name='jimmy';obj.sex='Male';obj.name='杨俊明'"); 
                var obj = ctx.GetParameter("obj") as Dictionary<string, object>; 
                foreach (var key in obj.Keys) 
                { 
                    Console.WriteLine(string.Format("{0}:{1}", key, obj[key])); 
                    //name:杨俊明 
                    //sex:Male 
                } 
                var jsonArr = ctx.Run("[{Airport:'PEK',Name:'北京首都机场'},{Airport:'XIY',Name:'西安咸阳机场'}]") as Array; 
                foreach (var item in jsonArr) 
                { 
                    var json = item as Dictionary<string, object>; 
                    foreach (var key in json.Keys) 
                    { 
                        Console.WriteLine(string.Format("{0}:{1}", key, json[key])); 
                        //Airport:PEK 
                        //Name:北京首都机场 
                        //Airport:XIY 
                        //Name:西安咸阳机场 
                    } 
                } 
                ctx.SetParameter("x", 7); 
                ctx.Run("function add(x,y){return x+y;}; function sub(x,y){return x-y;};k = add(2,x);var t = sub(9,1);"); 
                var k = ctx.GetParameter("k"); 
                Console.WriteLine(k);//9 
                var t = ctx.GetParameter("t"); 
                Console.WriteLine(t);//8 
                Console.Read(); 
            } 

        } 

    } 
}

部署时要注意，msvcp100.dll、msvcr100.dll这二个文件，要复制到bin目录下

二、利用Microsoft.JScript.Vsa

先添加Microsoft.JScript、Microsoft.Vsa二个程序集的引用，然后就能用了，示例代码如下:

复制代码代码如下:

using Microsoft.JScript; 
using Microsoft.JScript.Vsa; 
using System; 

namespace JsCSharp 
{ 
    class Program 
    { 
        static VsaEngine Engine = VsaEngine.CreateEngine(); 

        static void Main(string[] args) 
        { 
            var i = (int)EvalJScript("1+2;"); 
            Console.WriteLine(i);//3 
            var d = (DateObject)EvalJScript("var d = new Date(2013,9-1,2,20,30,15)"); 
            Console.WriteLine(d);//Mon Sep 2 20:30:15 UTC+8 2013 
            var j = EvalJScript("function add(x,y){return x+y;};add(5,10);"); 
            Console.WriteLine(j);//15 
            var obj = EvalJScript("var obj = {};obj.name='jimmy';obj.sex='Male';"); 
            Console.WriteLine(obj);//Male 注：只返回最后一条执行的语句结果 
            Console.Read(); 
        } 

  
        static object EvalJScript(string JScript) 
        { 
            object Result = null; 
            try
            { 
                Result = Microsoft.JScript.Eval.JScriptEvaluate(JScript, Engine); 
            } 
            catch (Exception ex) 
            { 
                return ex.Message; 
            } 
            return Result; 

        } 
    } 
}

Vsa的功能比较有限，多条语句执行时，只返回最后一条语句的执行结果。