C# 动态执行JS

有时候需要，在程序中灵活的嵌入自定义的计算逻辑，使用C#加载JS脚本形式可以实现；

// 添加引用 using Microsoft.JScript;

string jsStr = "var i=100; i++; i=i*100; var obj = {a:i};";

Stopwatch sw = new Stopwatch();

sw.Start();

object ret1 = null;

try

{

    ret1 = Eval.JScriptEvaluate(jsStr, VsaEngine.CreateEngine());

}

catch (Exception ex)

{

    MessageBox.Show(ex.StackTrace.ToString(), "执行失败", MessageBoxButtons.OK, MessageBoxIcon.Error);

    return;

}

sw.Stop();

string res = "";

if (ret1 is ArrayObject)

{

    // 数组

    ArrayObject arr = (ArrayObject)ret1;

    res = arr[].ToString();

}

else if (ret1 is JSObject)

{

    // 对象

    JSObject obj = (JSObject)ret1;

    res = obj["a"].ToString();

}

else

{

    // 单值

    res = ret1.ToString();

}

MessageBox.Show(res + " 用时：" + sw.ElapsedMilliseconds.ToString() + "ms");