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/// <summary>
/// JSEngine 在后台运行js的解释器返回值
/// </summary>
public class JSEngine
{
//初始化加载程序的字符串;
public static readonly String _jsString = @"class theEval{ public function Eval(str:String):String {return eval(str)}}";
public static readonly String _jsClassName = @"theEval";
public static readonly String _jsMethodName = @"Eval";
//定义对象
public static object _evalObject = new object();
public static Type _evalType = new object().GetType();
//构造函数
static JSEngine()
{
CreatJSEngine(ref _evalObject, ref _evalType, _jsString, _jsClassName);
}
/// <summary>
/// 初始化引擎的方法
/// </summary>
/// </summary>
/// <param name="evalObject">指定一个 已存在的变量 保存 使用evalType的类型生成一个实例</param>
/// <param name="evalType">指定一个 已存在的变量 保存 生成的程序集中有指定名称的对象type</param>
/// <param name="jsString">指定用来生成程序集的代码文本</param>
/// <param name="jsClassName">指定用来进行调用的程序集中的类别名称</param>
private static void CreatJSEngine(ref object evalObject, ref Type evalType, string jsString, string jsClassName)
{
CodeDomProvider _provider = new JScriptCodeProvider();
CompilerParameters _parameters = new CompilerParameters();
_parameters.GenerateInMemory = true;
CompilerResults _result = _provider.CompileAssemblyFromSource(_parameters, jsString);
Assembly _assembly = _result.CompiledAssembly;
evalType = _assembly.GetType(jsClassName);
evalObject = Activator.CreateInstance(evalType);
}
/// <summary>
/// StringEval
/// </summary>
/// <param name="inp_JSString">传入一个表达式</param>
/// <returns>返回一个表达式的值</returns>
public static object StringEval(string inp_JSString)
{
return _evalType.InvokeMember(_jsMethodName, BindingFlags.InvokeMethod, null, _evalObject, new object[] { inp_JSString });
}
/// <summary>
/// StringEval
/// </summary>
/// <param name="inp_JSFunctionString">指定用来生成程序集的代码文本</param>
/// <param name="inp_JSFunctionClassName">指定用来进行调用的程序集中的类别名称</param>
/// <param name="inp_JSFunctionClassFuncName">指定用来进行调用的程序集中的类别中的函数的名称</param>
/// <param name="inp_ParameterObject">要传递到程序集中的变量对象数组,无参时使用 new object[0]</param>
/// <returns>返回函数调用的值</returns>
public static object StringEval(string inp_JSFunctionString, string inp_JSFunctionClassName, string inp_JSFunctionClassFuncName, object[] inp_ParameterObject)
{
object ClosureevalObject = null;
Type ClosureevalType = null;
CreatJSEngine(ref ClosureevalObject, ref ClosureevalType, inp_JSFunctionString, inp_JSFunctionClassName);
return ClosureevalType.InvokeMember(inp_JSFunctionClassFuncName, BindingFlags.InvokeMethod, null, ClosureevalObject, inp_ParameterObject);
}
/// <summary>
/// StringEval
/// </summary>
/// <param name="inp_JSString">传入一个表达式</param>
/// <param name="inp_theType">指定的要返回的值类型</param>
/// <returns>返回的值</returns>
public static object StringEval(string inp_JSString, Type inp_theType)
{
return Microsoft.JScript.Convert.Coerce(_evalType.InvokeMember(_jsMethodName, BindingFlags.InvokeMethod, null, _evalObject, new object[] { inp_JSString }), inp_theType);
}
}
Response.Write("<script>alert('irow=" + Session["irow"].ToString() + "');</script>");