五一时去朋友那, 他问了个小问题, 只要写几十行代码就可以很好的说明问题.可偏偏机子没装VS, 只好做罢.回来后想想, 要是有个在线的C#IDE就好了.于是上网查了下相关的资料, 整出来个简单的在线C#IDE.
做这个,主要要解决两个问题, 一是如果将网页上文本框的代码编译并执行;二是如果将程序运行结果在网页上输出.
第一个问题不难, .NET已经有现成的C#编译类CSharpCodeProvider(或是其它语言的),再使用CompilerParameters类做为编译参数,就可以很容易的实现.
第二个问题, 举最简单情况, 就是将Console.Write方法输出的内容在网页上显示出来.这其实也很好办,只要在编译之前, 在输出语句做一个替换, 将输出的内容存到另一个地方.等运行结束后, 再从那个地方取出来就是了.
代码实现如下: 以下是引用片段:
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- namespace VSOnline.Framework
- {
- /**////
- /// 自定义的输出类
- ///
- public class Consoler
- {
- //存储所有输出
- public static Dictionary Outputs { get; set; }
- static Consoler()
- {
- Outputs = new Dictionary();
- }
- 输出操作#region 输出操作
- //当前输出
- public List Output { get; private set; }
- public Consoler()
- {
- Output = new List();
- }
- public void Write(object str)
- {
- Output.Add(str.ToString());
- }
- public void WriteLine(object str)
- {
- Output.Add(str.ToString() + "n");
- }
- #endregion
- }
- }
- using System;
- using System.Reflection;
- using Microsoft.CSharp;
- using System.CodeDom.Compiler;
- using System.Collections.Generic;
- using System.Linq;
- using System.Web;
- namespace VSOnline.Framework
- {
- /**////
- /// 代码执行类
- ///
- public class CodeRun
- {
- /**////
- /// Framework版本,可选择v2.0, v3.0, v3.5
- ///
- private string CompilerVersion { get; set; }
- /**////
- /// 构造函数
- ///
- /// Framework版本,可选择v2.0, v3.0, v3.5
- public CodeRun(string compilerVersion)
- {
- CompilerVersion = compilerVersion;
- }
- /**////
- /// 构造函数,默认为3.5版本
- ///
- public CodeRun()
- {
- CompilerVersion = "v3.5";
- }
- /**////
- /// 动态编译并执行代码
- ///
- /// 代码
- /// 返回输出内容
- public List Run(string code, string id, params string[] assemblies)
- {
- Consoler.Outputs.Add(id, new Consoler());
- CompilerParameters compilerParams = new CompilerParameters();
- //编译器选项设置
- compilerParams.CompilerOptions = "/target:library /optimize";
- //compilerParams.CompilerOptions += @" /lib:""C:Program FilesReference AssembliesMicrosoftFrameworkv3.5""";
- //编译时在内存输出
- compilerParams.GenerateInMemory = true;
- //生成调试信息
- compilerParams.IncludeDebugInformation = false;
- //添加相关的引用
- foreach (string assembly in assemblies)
- {
- compilerParams.ReferencedAssemblies.Add(assembly);
- }
- compilerParams.ReferencedAssemblies.Add("mscorlib.dll");
- compilerParams.ReferencedAssemblies.Add("System.dll");
- if (this.CompilerVersion == "v3.5")
- {
- compilerParams.ReferencedAssemblies.Add("System.Core.dll");
- }
- string path = "";
- try
- {
- path = HttpContext.Current.Server.MapPath("/bin/");
- }
- catch { }
- compilerParams.ReferencedAssemblies.Add(path + "VSOnline.Framework.dll");
- CSharpCodeProvider compiler = new CSharpCodeProvider(new Dictionary() { { "CompilerVersion", CompilerVersion } });
- //编译
- code = code.Replace("Console.WriteLine", string.Format("VSOnline.Framework.Consoler.Outputs["{0}"].WriteLine", id));
- code = code.Replace("Console.Write", string.Format("VSOnline.Framework.Consoler.Outputs["{0}"].Write", id));
- CompilerResults results = compiler.CompileAssemblyFromSource(compilerParams, code);
- //错误
- if (results.Errors.HasErrors)
- {
- foreach (CompilerError error in results.Errors)
- {
- Consoler.Outputs[id].Output.Add(error.ErrorText + "n");
- }
- return ReturnOutput(id);
- }
- //创建程序集
- Assembly asm = results.CompiledAssembly;
- //获取编译后的类型
- object mainClass = asm.CreateInstance("Program");
- Type mainClassType = mainClass.GetType();
- //输出结果
- mainClassType.GetMethod("Main").Invoke(mainClass, null);
- return ReturnOutput(id);
- }
- private List ReturnOutput(string id)
- {
- string[] output = new string[Consoler.Outputs[id].Output.Count];
- Consoler.Outputs[id].Output.CopyTo(output, 0);
- Consoler.Outputs.Remove(id);
- return output.ToList();
- }
- }
- }
测试:
以下是引用片段:
- using VSOnline.Framework;
- using Microsoft.VisualStudio.TestTools.UnitTesting;
- using System.Collections.Generic;
- using System;
- using FastDev.Core;
- using System.Linq;
- namespace Test
- {
- [TestClass()]
- public class CodeRunTest
- {
- [TestMethod()]
- public void RunTest()
- {
- CodeRun target = new CodeRun();
- string code = @"
- using System;
- public class Program
- {
- public static void Main()
- {
- for(int index = 1;index <= 3;index++)
- {
- Console.Write(index);
- }
- }
- }
- ";
- List expected = new List() { "1", "2", "3" };
- List actual;
- actual = target.Run(code, "1");
- Assert.AreEqual(true, expected.SerializeEqual(actual));
- actual = target.Run(code, "2");
- Assert.AreEqual(true, expected.SerializeEqual(actual));
- }
- [TestMethod()]
- public void Run35Test()
- {
- CodeRun target = new CodeRun();
- string code = @"
- using System;
- using System.Collections;
- using System.Collections.Generic;
- using System.Linq;
- public class Program
- {
- public static string Name { get; set; }
- public static void Main()
- {
- Name = ""3"";
- Console.Write(Name);
- }
- }
- ";
- List actual;
- actual = target.Run(code, "1", "System.Core.dll");
- Assert.AreEqual("3", actual[0]);
- }
- }
- }