Question

可能重复：
Best and shortest way to evaluate mathematical expressions

如何使用C＃在运行时运行字符串公式？

string formula = "10/2";
var result = Run(result);

感谢

Answer 1

需要加载某种脚本引擎，然后将字符串传递给脚本引擎进行评估。

只需要知道哪种脚本语言使用。 Javascript，VbScript，Python等附件是Iron Python的链接和一些显示如何使用它的代码。使用VS2010 .Net 4。

http://ironpython.net/

using IronPython.Hosting;
using IronPython.Runtime;

//Script Engine Reference
using Microsoft.Scripting.Hosting;
//Source Code Kind Reference
using Microsoft.Scripting;

//Iron Python Reference
using IronPython.Hosting;
using IronPython.Runtime;
//Source Execute
using Microsoft.CSharp;

            ScriptEngine engine = Python.CreateEngine();
            ScriptRuntime runtime = engine.Runtime;
            ScriptScope scope = runtime.CreateScope();

            //Simple Example

            string code = @"emp.Salary * 0.3";


            ScriptSource source =
              engine.CreateScriptSourceFromString(code, SourceCodeKind.Expression);


            var emp = new Employee { Id = 1000, Name = "Bernie", Salary = 1000 };


            scope.SetVariable("emp", emp);


            var res = (double)source.Execute(scope);

            MessageBox.Show(res.ToString());




 public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public double Salary { get; set; }


    }

如何使用C＃在运行时运行字符串公式？

1 个答案: