How Can I Dynamically Compile and Execute C# Code Fragments?

dynamic compilation and execution of the code fragment

This article introduces how to dynamically compile and execute the C#code fragment from text files or input stream. It is recommended to use the code document object model (CODEDOM) in the C#and .NET language to achieve this function.

CodeDom allows you to operate the code as an object and use the compiler to dynamically compile the code. The following code fragment shows this method:

In this example,

<code class="language-csharp">using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.Reflection;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var csc = new CSharpCodeProvider(new Dictionary<string, string>() { { "CompilerVersion", "v3.5" } });
        var parameters = new CompilerParameters(new[] { "mscorlib.dll", "System.Core.dll" }, "foo.exe", true);
        parameters.GenerateExecutable = true;
        CompilerResults results = csc.CompileAssemblyFromSource(parameters,
        @"using System.Linq;
            class Program {
              public static void Main(string[] args) {
                var q = from i in Enumerable.Range(1,100)
                          where i % 2 == 0
                          select i;
                foreach(var item in q)
                {
                    Console.WriteLine(item);
                }
              }
            }");

        // 检查错误
        results.Errors.Cast<CompilerError>().ToList().ForEach(error => Console.WriteLine(error.ErrorText));

        // 动态加载并执行已编译的程序集
        if (results.Errors.Count == 0)
        {
            Assembly assembly = results.CompiledAssembly;
            var type = assembly.GetTypes()[0];
            var method = type.GetMethod("Main");
            method.Invoke(null, new object[] { new string[] { } });
        }
    }
}</code>

and

are used for dynamic compilation code. If there is no compilation error, dynamically load the compiled program set and call its CompilationParameters method. In order to show the results more completely, the sample code has been modified to the printed puppet results. CSharpCodeProvider Main This method provides a flexible and general solution for dynamic compilation and execution of the C#code fragment, allowing you to realize various scenarios, such as script execution or dynamic code generation.

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