C#中計算字符串類型的表達式的值

方法一:

　　用Microsoft.Vsa方法

 

        string Expression = "var result:int =0;result==1?\"成功\":\"失败\"";

        Microsoft.JScript.Vsa.VsaEngine ve = Microsoft.JScript.Vsa.VsaEngine.CreateEngine();

        Console.WriteLine(Microsoft.JScript.Eval.JScriptEvaluate(Expression, ve));

 

 

方法二:

　　用Javascript中的eval方法.

 

        /// <summary>
        /// 引用com组件Microsoft Script Control
        /// %SystemRoot%\system32\msscript.ocx        
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static string Eval(string Expression)
        {
            string strResult = null;
            try
            {
                MSScriptControl.ScriptControlClass jscript = new MSScriptControl.ScriptControlClass();
                jscript.Language = "JScript";          

                strResult = jscript.Eval(Expression).ToString();
            }
            catch (Exception ex)
            {
                Debug.Fail(ex.Message);        

            }
            return strResult;
        }