我有一些非常简单的代码来生成程序集并调用包含的类型上的方法。 该方法被调用并正确运行,但是当我使用 Reflector 查看生成的程序集时,我看不到该类型。
以下是示例代码:
namespace ConsoleApplication2
{
class Proggy
{
public static void Main(string[] args)
{
var ab = AppDomain.CurrentDomain.DefineDynamicAssembly(
new AssemblyName() { Name = "MyAssembly" },
AssemblyBuilderAccess.RunAndSave);
var module = ab.DefineDynamicModule(ab.GetName().Name);
var typeBuilder = module.DefineType("MyType");
var ctr = typeBuilder.DefineConstructor(MethodAttributes.Public,
CallingConventions.Standard, Type.EmptyTypes);
var ilgc = ctr.GetILGenerator();
ilgc.Emit(OpCodes.Ldarg_0);
ilgc.Emit(OpCodes.Call, typeof(object).GetConstructor(Type.EmptyTypes));
ilgc.Emit(OpCodes.Ret);
var method = typeBuilder.DefineMethod("MyMethod", MethodAttributes.Public,
typeof(int), new[] { typeof(string) });
var ilg = method.GetILGenerator();
ilg.Emit(OpCodes.Ldarg_1);
ilg.EmitCall(OpCodes.Callvirt, typeof(string).GetProperty("Length").GetGetMethod(),
null);
ilg.Emit(OpCodes.Ret);
var type = typeBuilder.CreateType();
ab.Save("mytestasm.dll");
var inst = Activator.CreateInstance(type);
Console.WriteLine(type.InvokeMember("MyMethod", BindingFlags.InvokeMethod, null, inst,
new[] { "MyTestString" }));
Console.ReadLine();
}
}
}
这是 Reflector 的相应反汇编:
.assembly MyAssembly
{
.ver 0:0:0:0
.hash algorithm 0x00008004
}
.module RefEmit_OnDiskManifestModule
// MVID: {0B944140-58D9-430E-A867-DE0AD0A8701F}
// Target Runtime Version: v2.0.50727
...和...
{
.class private auto ansi <Module>
{
}
}
任何人都可以帮助我正确保存程序集吗?
技巧是在 AssemblyBuilder 实例上使用 DefineDynamicModule 方法的“持久模块”版本。 也就是说,而不是:
var module = ab.DefineDynamicModule(ab.GetName().Name);
使用类似的东西:
var module = ab.DefineDynamicModule(ab.GetName().Name, ab.GetName().Name + ".mod");
保存后,程序集中会出现相应的模块。
我不确定为什么没有添加该类型。
执行此操作的另一种方法是通过传入包含类代码的字符串来动态创建代码。我认为这比上面的方法更容易,因为您可以使用字符串生成器构建代码并在工作室中进行测试。
这是我用来生成dll的代码:
print(" Microsoft.CSharp.CSharpCodeProvider objCodeProvider = new Microsoft.CSharp.CSharpCodeProvider();
string strCode = "using System;" + Environment.NewLine + "using System.Data;" + Environment.NewLine + "using DC.Common;" + Environment.NewLine + "" + Environment.NewLine + "using System.Data.SqlClient;" + Environment.NewLine + "using System.Configuration;" + Environment.NewLine + "" + Environment.NewLine + Environment.NewLine + BaseClassFile + Environment.NewLine + BaseManagerFile + Environment.NewLine;
string strSourceModule = BuilderSettings.ExportDir + "/" + BuilderSettings.ProjectName + "/" + "BaseFile.cs";
FileHelper.WriteAllText(strSourceModule, strCode);
FileHelper.WriteAllText(BuilderSettings.ExportDir + "/" + BuilderSettings.ProjectName + "/" + "test.txt", strCode);
ICodeCompiler icc = objCodeProvider.CreateCompiler();
string OutputPath = BuilderSettings.ExportDir + "/" + BuilderSettings.ProjectName + "/" + BuilderSettings.ProjectName + ".dll";
CompilerParameters parameters = new CompilerParameters();
CompilerResults results;
parameters.GenerateExecutable = false;
parameters.OutputAssembly = OutputPath;
parameters.GenerateInMemory = false;
parameters.IncludeDebugInformation = false;
//Add required assemblies
DynamicLinkLibraries.Clear();
//User defined
DynamicLinkLibraries.Add(@"d:\wwwroot\\DC.Common\bin\Debug\DC.Common.dll");
//System
DynamicLinkLibraries.Add("System.dll");
DynamicLinkLibraries.Add("System.Data.dll");
DynamicLinkLibraries.Add("mscorlib.dll");
DynamicLinkLibraries.Add("System.xml.dll");
DynamicLinkLibraries.Add("System.web.dll");
DynamicLinkLibraries.Add("System.configuration.dll");
//Any dynamic assembly adding must be done here
foreach (string strLibrary in DynamicLinkLibraries)
{
parameters.ReferencedAssemblies.Add(strLibrary);
}
results = icc.CompileAssemblyFromSource(parameters, strCode);
if (results.Errors.Count > 0)
{
//report any compilation errors
string strErrors = "Compilation failed:" + Environment.NewLine;
foreach (CompilerError oError in results.Errors)
{
strErrors = strErrors + "Line number " + oError.Line + ", Error Number: " + oError.ErrorNumber + ", '" + oError.ErrorText + ";";
}
throw new Exception("Error in CompileSourceCode(): " + Environment.NewLine + strErrors);
}
objCodeProvider = null;
icc = null;
parameters = null;");