c#字符串中包含的运算符按正常计算 例如按四则运算等，类似公式计算，很好很强大
/// <summary> /// 将字符串中的运算符按正常计算 例如按四则运算 /// </summary> /// <param name="expression">标准表达式如 1+15*0.5-200</param> /// <returns>返回计算的值，可以为任意合法的数据类型</returns> protected static object MathCalculate(string expression) { object retvar = null; Microsoft.CSharp.CSharpCodeProvider provider = new Microsoft.CSharp.CSharpCodeProvider(); System.CodeDom.Compiler.CompilerParameters cp = new System.CodeDom.Compiler.CompilerParameters( new string[] { @"System.dll" }); StringBuilder builder = new StringBuilder("using System;class CalcExp{public static object Calc(){ return \"expression\";}}"); builder.Replace("\"expression\"", expression); string code = builder.ToString(); System.CodeDom.Compiler.CompilerResults results; results = provider.CompileAssemblyFromSource(cp, new string[] { code }); if (results.Errors.HasErrors) { retvar = null; } else { System.Reflection.Assembly a = results.CompiledAssembly; Type t = a.GetType("CalcExp"); retvar = t.InvokeMember("Calc", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.InvokeMethod , System.Type.DefaultBinder, null, null); } return retvar; }