从生成它的应用程序中调试生成的 .NET 程序集
简而言之,问题是:如何调试生成程序的调试会话期间生成的代码? (参见下面的代码)
我面临以下问题:我想从生成它的应用程序中调试动态生成/编译的代码。我提供了一个过于简单的例子来澄清它。这个例子不需要调试!我的真实应用程序生成了更多真正证明调试合理的行和代码,相信我:-) 我想知道是否有办法调试或在 HelloWorld
处放置断点。单步执行 InvokeMethod 调用不起作用。也许解决方案涉及在生成的程序集的调用站点上进行代码修改。
我已经查看了许多问题(在 Visual Studio 中调试动态加载的程序集.NET 例如),但没有一个对解决问题有帮助(如果可以解决的话?)
我从 http://www.csharpfriends.com/Articles/getArticle.aspx?articleID=118 为基础并修复了过时的调用。除此之外,我在内存中动态生成了程序集,并且调用运行良好。我显式生成了一个带有调试信息的程序集,这给了我希望:如果无法进行调试,为什么会有这个选项?
using System;
using System.Text;
using System.IO;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;
namespace DynamicAssembly
{
class CreateCompileExecute
{
[STAThread]
static void Main(string[] args)
{
// Creates a text file to store the new class
StringBuilder builder = new StringBuilder();
builder.AppendLine("using System;");
builder.AppendLine("namespace CSharpFriendsRocks");
builder.AppendLine("{");
builder.AppendLine("class CSharpFriends");
builder.AppendLine("{");
builder.AppendLine("public CSharpFriends() {" +
" Console.WriteLine(\"The CSharpFriends type is constructed\"); }");
builder.AppendLine("public void HelloWorld() {" +
" Console.WriteLine(\"Hello World - CSharpFriends.Com Rocks.\"); }");
builder.AppendLine("}");
builder.AppendLine("}");
// Create the C# compiler
CSharpCodeProvider csCompiler = new CSharpCodeProvider();
// input params for the compiler
CompilerParameters compilerParams = new CompilerParameters();
compilerParams.OutputAssembly = "CSharpFriends.dll";
compilerParams.GenerateInMemory = true;
compilerParams.IncludeDebugInformation = true;
compilerParams.ReferencedAssemblies.Add("system.dll");
compilerParams.GenerateExecutable = false; // generate the DLL
// Run the compiler and build the assembly
CompilerResults results = csCompiler.CompileAssemblyFromSource(
compilerParams, builder.ToString());
// Load the generated assembly into the ApplicationDomain
Assembly asm = results.CompiledAssembly;
Type t = asm.GetType("CSharpFriendsRocks.CSharpFriends");
// BindingFlags enumeration specifies flags that control binding and
// the way in which the search for members and types is conducted by reflection.
// The following specifies the Access Control of the bound type
BindingFlags bflags = BindingFlags.DeclaredOnly | BindingFlags.Public
| BindingFlags.NonPublic | BindingFlags.Instance;
// Construct an instance of the type and invoke the member method
Object obj = t.InvokeMember("HelloWorld", bflags |
BindingFlags.CreateInstance, null, null, null);
// Call the method
t.InvokeMember("HelloWorld", bflags | BindingFlags.InvokeMethod,
null, obj, null);
}
}
}
The question in short: How can I debug the code generated during a debugging session on the generating program? (see code below)
I am facing the following issue: I would like to debug into dynamically generated/compiled code from the application that generates it. I provided an oversimplified example to clarify it. This example doesn't need debugging! My real app generates many more lines and code that really justify debugging, believe me :-) I would like to know if there is a way to debug or put a breakpoint at HelloWorld
. Stepping into the InvokeMethod call doesn't work. Maybe a solution involves code modification at the call sites to the generated assembly.
I had a look at many questions already (Debug dynamically loaded assembly in Visual Studio .NET for example) but none was helpful in solving the problem (if solvable at all?)
I took code from http://www.csharpfriends.com/Articles/getArticle.aspx?articleID=118 as a base and fixed the obsoleted calls. Beside this I generated the assembly on-the-fly in memory and the calls are working well. I generated explicitly an assembly with Debug information, what gives me hope: why would there be the option if debugging is not possible?
using System;
using System.Text;
using System.IO;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;
namespace DynamicAssembly
{
class CreateCompileExecute
{
[STAThread]
static void Main(string[] args)
{
// Creates a text file to store the new class
StringBuilder builder = new StringBuilder();
builder.AppendLine("using System;");
builder.AppendLine("namespace CSharpFriendsRocks");
builder.AppendLine("{");
builder.AppendLine("class CSharpFriends");
builder.AppendLine("{");
builder.AppendLine("public CSharpFriends() {" +
" Console.WriteLine(\"The CSharpFriends type is constructed\"); }");
builder.AppendLine("public void HelloWorld() {" +
" Console.WriteLine(\"Hello World - CSharpFriends.Com Rocks.\"); }");
builder.AppendLine("}");
builder.AppendLine("}");
// Create the C# compiler
CSharpCodeProvider csCompiler = new CSharpCodeProvider();
// input params for the compiler
CompilerParameters compilerParams = new CompilerParameters();
compilerParams.OutputAssembly = "CSharpFriends.dll";
compilerParams.GenerateInMemory = true;
compilerParams.IncludeDebugInformation = true;
compilerParams.ReferencedAssemblies.Add("system.dll");
compilerParams.GenerateExecutable = false; // generate the DLL
// Run the compiler and build the assembly
CompilerResults results = csCompiler.CompileAssemblyFromSource(
compilerParams, builder.ToString());
// Load the generated assembly into the ApplicationDomain
Assembly asm = results.CompiledAssembly;
Type t = asm.GetType("CSharpFriendsRocks.CSharpFriends");
// BindingFlags enumeration specifies flags that control binding and
// the way in which the search for members and types is conducted by reflection.
// The following specifies the Access Control of the bound type
BindingFlags bflags = BindingFlags.DeclaredOnly | BindingFlags.Public
| BindingFlags.NonPublic | BindingFlags.Instance;
// Construct an instance of the type and invoke the member method
Object obj = t.InvokeMember("HelloWorld", bflags |
BindingFlags.CreateInstance, null, null, null);
// Call the method
t.InvokeMember("HelloWorld", bflags | BindingFlags.InvokeMethod,
null, obj, null);
}
}
}
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在发现我的问题与 如何在codedom编译的代码中进行调试/中断,这对我来说并不明显。 bbmud 在那里给出了一个非常好的提示,使调试器正常工作,但没有告诉如何进入代码。我添加了对包含我想要在脚本中实现的接口的某个程序集的引用:
现在,当我认为
CSharpFriends
是IPlugin
的实现时,我可以通过以下方式获取该接口:转换上面的obj
:然后调试对接口方法或属性的调用就像平常一样简单! 在脚本代码中添加的技巧
也很有效,但需要更改脚本。由于应用程序内部的代码总是需要根据某种机制(属性或接口的反射)知道脚本内部有哪些方法,因此使用两者都知道的接口对我来说是一个非常可以接受的解决方案。
我希望它对其他人有帮助。
I finally found a way to workaround it after discovering that my question was a duplicate of How to debug/break in codedom compiled code, which was not obvious for me to find. bbmud gives a very good hint in there to get the debugger working correctly, but doesn't tell how to get into the code. I add a reference to some assembly containing an interface that I want to implement in the scripts:
Now when I consider
CSharpFriends
being an implementation ofIPlugin
, I can get the interface by casting theobj
above:Then debugging calls to interface methods or properties is as easy as usual! The trick of adding
inside the script code also works well but it needs change to the script. As the code inside the application always needs to know what kind of methods are inside the script according to some mechanism (reflexion with attributes or interfaces), using an interface known by both is a very acceptable solution for me.
I hope it helps somebody else.
Visual Studio 2010 在调试器中温和地处理这个问题。升级后我很惊讶。我希望它有帮助。
Visual Studio 2010 handles this gently in the debugger. I was surprised of it after I upgraded. I hope it helps.