c# - ICSharpCode.Decompiler + Mono.Cecil -> 如何为单个方法生成代码？

Question

我能够使用 Mono.Cecil 和 ICSharpCode.Decompiler 为类型或程序集生成代码。

但是如果我尝试为单个方法生成代码，我将收到错误“对象引用未设置为对象的实例。”

你们能给我一些关于这方面的提示吗？在此先感谢您提供的所有帮助。

为程序集中的所有类型生成代码的代码:

DirectoryInfo di = new DirectoryInfo(appPath);
FileInfo[] allAssemblies = di.GetFiles("*.dll");
foreach (var assemblyFile in allAssemblies)
{
    string pathToAssembly = assemblyFile.FullName;
    System.Reflection.Assembly assembly = System.Reflection.Assembly.ReflectionOnlyLoadFrom(pathToAssembly);
    Mono.Cecil.AssemblyDefinition assemblyDefinition = Mono.Cecil.AssemblyDefinition.ReadAssembly(pathToAssembly,parameters);
    AstBuilder astBuilder = null;

    foreach (var typeInAssembly in assemblyDefinition.MainModule.Types)
    {
        if (typeInAssembly.IsPublic)
        {
             Console.WriteLine("T:{0}", typeInAssembly.Name);
            //just reset the builder to include only code for a single type
            astBuilder = new AstBuilder(new ICSharpCode.Decompiler.DecompilerContext(assemblyDefinition.MainModule));
            astBuilder.AddType(typeInAssembly);
            StringWriter output = new StringWriter();
            astBuilder.GenerateCode(new PlainTextOutput(output));
            string result = output.ToString();
            output.Dispose();
        }
    }
}

为程序集中的所有公共(public)方法生成代码的代码:

DirectoryInfo di = new DirectoryInfo(appPath);
FileInfo[] allAssemblies = di.GetFiles("*.dll");
foreach (var assemblyFile in allAssemblies)
{
    string pathToAssembly = assemblyFile.FullName;
    System.Reflection.Assembly assembly = System.Reflection.Assembly.ReflectionOnlyLoadFrom(pathToAssembly);
    Mono.Cecil.AssemblyDefinition assemblyDefinition = Mono.Cecil.AssemblyDefinition.ReadAssembly(pathToAssembly,parameters);
    AstBuilder astBuilder = null;

    foreach (var typeInAssembly in assemblyDefinition.MainModule.Types)
    {
        if (typeInAssembly.IsPublic)
        {
            Console.WriteLine("T:{0}", typeInAssembly.Name);
            foreach (var method in typeInAssembly.Methods)
            {
                //just reset the builder to include only code for a single method
                astBuilder = new AstBuilder(new ICSharpCode.Decompiler.DecompilerContext(assemblyDefinition.MainModule));
                astBuilder.AddMethod(method);
                if (method.IsPublic && !method.IsGetter && !method.IsSetter && !method.IsConstructor)
                {
                    Console.WriteLine("M:{0}", method.Name);
                    StringWriter output = new StringWriter();
                    astBuilder.GenerateCode(new PlainTextOutput(output));
                    string result = output.ToString();
                    output.Dispose();
                }
            }
        }
    }
}

Answer 1

我遇到了同样的问题。您应该设置 DecompilerContext 的 CurrentType 属性。将您的代码更改为

astBuilder = new AstBuilder(new ICSharpCode.Decompiler.DecompilerContext(assemblyDefinition.MainModule) { CurrentType = typeInAssembly } );