C# 动态计算表达式的值--动态编译和DataTable.Compute()

        public static void TestComput(string expression)        {            //要编译的代码段            string code = @"public class TestCompute{public static object Compute(){return @exp;}}";            code = code.Replace("@exp", expression);            CSharpCodeProvider csharpCodeProvider = new CSharpCodeProvider();            CompilerParameters compilerParameters = new CompilerParameters();            //compilerParameters.CompilerOptions = "/t:library";            //compilerParameters.GenerateInMemory = true;            //开始编译            CompilerResults compilerResults = csharpCodeProvider.CompileAssemblyFromSource(compilerParameters, code);            if (compilerResults.Errors.Count > 0)                throw new Exception("编译出错！");            Assembly assembly = compilerResults.CompiledAssembly;            Type type = assembly.GetType("TestCompute");            //使用动态编译计算表达式            object obj = type.GetMethod("Compute").Invoke(null, null);            //使用DataTable的Compute也可以计算一些简单的表达式            DataTable dt = new DataTable();            obj = dt.Compute(expression, null);        }