怎么用Roslyn编译器动态处理C#字符串
使用Roslyn编译器动态处理C#字符串可以通过以下步骤实现:
- 导入所需的命名空间:
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis;
- 创建SyntaxTree:
string code = "Console.WriteLine(\"Hello, world!\");";
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree(code);
- 创建编译选项:
CSharpCompilationOptions compilationOptions = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
- 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);
- 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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