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怎么用Roslyn编译器动态处理C#字符串

c#
小亿
140
2024-04-28 18:37:50
栏目: 编程语言

使用Roslyn编译器动态处理C#字符串可以通过以下步骤实现:

  1. 导入所需的命名空间:
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis;
  1. 创建SyntaxTree:
string code = "Console.WriteLine(\"Hello, world!\");";
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree(code);
  1. 创建编译选项:
CSharpCompilationOptions compilationOptions = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
  1. 创建编译上下文:
string assemblyName = Path.GetRandomFileName();
CSharpCompilation compilation = CSharpCompilation.Create(assemblyName)
  .WithOptions(compilationOptions)
  .AddReferences(MetadataReference.CreateFromFile(typeof(object).Assembly.Location))
  .AddSyntaxTrees(syntaxTree);
  1. 编译代码并获取生成的程序集:
using (var ms = new MemoryStream())
{
  EmitResult result = compilation.Emit(ms);
  if (!result.Success)
  {
    IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
      diagnostic.IsWarningAsError ||
      diagnostic.Severity == DiagnosticSeverity.Error);
  
    foreach (Diagnostic diagnostic in failures)
    {
      Console.Error.WriteLine("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
    }
  }
  else
  {
    ms.Seek(0, SeekOrigin.Begin);
    Assembly assembly = Assembly.Load(ms.ToArray());
    dynamic compiledCode = Activator.CreateInstance(assembly.GetType("TestProgram"));
    compiledCode.Main();
  }
}

通过以上代码,你可以动态编译和执行C#字符串中的代码。请注意,这种方法可能存在一定的安全风险,需要谨慎使用。

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