Roslyn初识

Roslyn

Roslyn 是微软公司开源的 .NET 编译器。

编译器支持 C# 和 Visual Basic 代码编译，并提供丰富的代码分析 API。

Roslyn不仅仅可以直接编译输出，而且开放了编译的API，使得代码脚本化成为了可能。

关于Roslyn，不做过多介绍，想要了解的各位请移步官方说明地址：github.com/dotnet/rosl…

本文主要介绍的是如何加载C#脚本，并在C#程序中调用并执行脚本

using DynamicScriptTest;

using Microsoft.CodeAnalysis.CSharp.Scripting;

using Microsoft.CodeAnalysis.Scripting;

Console.Write("测试基本算数表达式:(1+2)*3/4");

var res = await CSharpScript.EvaluateAsync("(1+2)*3/4");

Console.WriteLine(res);

Console.WriteLine("测试Math函数:Sqrt(2)");

res = await CSharpScript.EvaluateAsync("Sqrt(2)", ScriptOptions.Default.WithImports("System.Math"));

Console.WriteLine(res);

Console.WriteLine(@"测试字符串函数:""Hello"".Length");

res = await CSharpScript.EvaluateAsync(@"""Hello"".Length");

Console.WriteLine(res);

Console.WriteLine(@"测试输入输出函数:Directory.GetCurrentDirectory()");

res = await CSharpScript.EvaluateAsync("Directory.GetCurrentDirectory()",

     ScriptOptions.Default.WithImports("System.IO"));

Console.WriteLine(res);

Console.WriteLine(@"测试变量:");

var student = new Student { Height = 1.75M, Weight = 75 };

//student.BMI=await CSharpScript.EvaluateAsync<Decimal>("Weight/Height/Height", globals: student);

await CSharpScript.RunAsync("BMI=Weight/Height/Height", globals: student);

Console.WriteLine(student.BMI);

Console.WriteLine(@"测试脚本编译复用:");

var scriptBMI = CSharpScript.Create<Decimal>("Weight/Height/Height", globalsType: typeof(Student));

scriptBMI.Compile();

Console.WriteLine((await scriptBMI.RunAsync(new Student { Height = 1.72M, Weight = 65 })).ReturnValue);

Console.WriteLine(@"测试脚本中定义函数:");

string script1 = "decimal Bmi(decimal w,decimal h) { return w/h/h; } return Bmi(Weight,Height);";

var result = await CSharpScript.EvaluateAsync<decimal>(script1, globals: student);

Console.WriteLine(result);

Console.WriteLine(@"测试脚本中的变量:");

var script =  CSharpScript.Create("int x=1;");

script =  script.ContinueWith("int y=1;");

script =  script.ContinueWith("return x+y;");

Console.WriteLine((await script.RunAsync()).ReturnValue);

Console.WriteLine(@"测试脚本中的变量var:");

var script2 = CSharpScript.Create("var x=1;");

script2 = script2.ContinueWith("var y=1.5;");

script2 = script2.ContinueWith("return x+y;");

Console.WriteLine((await script2.RunAsync()).ReturnValue);

Console.WriteLine(@"测试脚本中的变量数组:");

var script3 = CSharpScript.Create("int[] x = new int[7] { 1, 2, 3, 4, 5, 6, 7 }; ");

script3 = script3.ContinueWith("int y=0;");

script3 = script3.ContinueWith("for(var i=0;i<7;i++) y+=x[i] ;");

script3 = script3.ContinueWith("return y;");

Console.WriteLine((await script3.RunAsync()).ReturnValue);

Console.WriteLine(@"文件读入脚本:");

var s4 = CSharpScript.Create(File.ReadAllText("script.txt"));

Console.WriteLine((await s4.RunAsync()).ReturnValue);

Console.WriteLine(@"测试类:");

var script4 = CSharpScript.Create("public class Person { public string Name; } ");

script4 = script4.ContinueWith(@"var p=new Person{Name=""张三""}; ");

script4 = script4.ContinueWith("return p.Name;");

Console.WriteLine((await script4.RunAsync()).ReturnValue);