C#通过Roslyn编写脚本

一、Roslyn添加引用集#

通过Nuget添加Microsoft.CodeAnalysis.CSharp 引用集，需要注意.Net Framework4.6.1以上版本。

添加从成功后，引入以下空间命名：

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Scripting;

二、Roslyn 基本操作#

  class AnalysisTest
    {
        public async void GetCurrentDateTime()
        {
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} 开始获取当前时间");
            var s4     = CSharpScript.Create(@"return DateTime.Now.ToString(""yyyy-MM-dd HH:mm:ss:fff"");", ScriptOptions.Default.WithImports("System"));
            var result = (await s4.RunAsync()).ReturnValue;
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} {result}");
        }

        public async void ArithmeticExpression()
        {
            string expression = "(1+2)*3/4";
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} 计算算数表达式:{expression}");
            var res = await CSharpScript.EvaluateAsync(expression);
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} {res}");

        }

        public async void ArithmeticExpressionParam()
        {
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} 测试脚本中的变量:");
            var script = CSharpScript.Create("int x=3;int y=1;", ScriptOptions.Default.WithImports("System.Math"));
            script = script.ContinueWith("int z=2;");
            string expression = "Sqrt(x)+y";
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} 测试Math函数:{expression}");
            script = script.ContinueWith("return Sqrt(x)+y-2;");
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} {(await script.RunAsync()).ReturnValue}");

        }

        public async void DefineFunction()
        {
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} 测试脚本中定义函数（勾股定理）:");
            var script = CSharpScript.Create("int x=3;int y=4;", ScriptOptions.Default.WithImports("System.Math"));
            string script1 = "double PythagoreanTheorem(double x,double y) { return   Sqrt(Pow(x,2)+Pow(y,2)); } return PythagoreanTheorem(x,y);";
            script = script.ContinueWith(script1);
            Console.WriteLine($"{DateTime.Now:HH:mm:ss:fff} {(await script.RunAsync()).ReturnValue}");
        }
    }