Hi JB,
I have a class Logger with method LogText. This is to log text. I have
another class Math and has method add.
I am trying to inject Logger.LogText method call in the add method. Here is
the code.
if (m.Name.Equals("add", StringComparison.CurrentCultureIgnoreCase))
{
methodILProcessor = m.Body.GetILProcessor();
Instruction instrMsg = methodILProcessor.Create(OpCodes.Ldstr, "method
- add()");
m.Body.Instructions.Insert(0, instrMsg);
Type classObj = getType("Logger");//get type using reflection
TypeReference typeRef = type.Module.Import(classObj);
MethodReference logMethodRef =
assembly.MainModule.Import(classObj.GetMethod("LogText", new Type[] { typeof
(string) }));
m.Body.Instructions.Insert(1, Instruction.Create(OpCodes.Call,
logMethodRef));
}
While saving assembly, getting error as below. Can you please help and
suggest where I am doing wrong?
System.Void MyApp.Logger::LogText(System.String)' is declared in another
module and needs to be imported
Thanks
Venu
On Monday, February 27, 2012 at 8:51:34 PM UTC+5:30, Remy Blok wrote:
> I have a class with a default constructor. Based on an assembly
> attribute I'm trying to change the default constructor with additional
> arguments. The type of the arguments I'm adding is located in a
> different assembly.
> When I've change the assembly and try to save it I get an exception,
> which I cannot seem to fix: Member 'OtherAssembly.IViewModel' is
> declared in another module and needs to be imported.
>
> The assembly that contains the Type is referenced by the assembly I'm
> changing. I also see this in the AssemblyReferences in the current
> module. I'm importing the Type into the current module when I get the
> TypeReference out of the Attribute.
>
> It is probably someting simple but I can't seem to find it. What Am I
> doing wrong?
> Thanks for your help!
>
> Below the code I'm using to test the issue.
> Assembly "Views.dll" I'm changing contains:
>
> public class Class1
> {
> public Class1() { }
> }
>
> [assembly: OtherAssembly.ViewModel(typeof(Class1),
> typeof(OtherAssembly.IViewModel))]
>
>
> The "OtherAssembly" I'm referencing contains:
>
> namespace OtherAssembly
> {
> public interface IViewModel { }
>
> [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
> public class ViewModelAttribute : Attribute
> {
> public ViewModelAttribute(Type viewType, Type
> viewModelType) { }
> }
> }
>
> The Code I'm using in a separate tool to change the assembly:
>
> var module = ModuleDefinition.ReadModule("Views.dll");
>
> //load Assembly attribute
> var attribute = module.Assembly.CustomAttributes.First(a =>
> a.Constructor.DeclaringType.FullName ==
> "OtherAssembly.ViewModelAttribute");
> var customAttributeArguments = attribute.ConstructorArguments;
>
> //get Arguments from the attribute
> var viewType =
> module.Import((TypeReference)customAttributeArguments[0].Value).Resolve();
> //
> Resolves Class1
> var viewModelType =
> module.Import((TypeReference)customAttributeArguments[1].Value).Resolve();
> //
> Resolves OtherAssembly.IViewModel
>
> //find the constructor of "Class1"
> var ctor = viewType.Methods.First(m => m.IsConstructor && !m.IsStatic
> && m.Parameters.Count == 0);
>
> //add "OtherAssembly.IViewModel" parameter to constructor
> var viewModelTypeParameter = new ParameterDefinition(viewModelType);
> ctor.Parameters.Add(viewModelTypeParameter);
>
> //write causes exception: Member 'OtherAssembly.IViewModel' is
> declared in another module and needs to be imported
> module.Write("Views2.dll");
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