[Closed] C# Activator problem

without your c# code no one can tell you what’s going wrong

edited…
wait a sec… i don’t remember the set of arguments for CreateInstance method that you use… check the arguments types

Here’s a snippet to play with, sorry for the imprecision!
The method i want to use is:
.<System.Object>CreateInstance <System.String>typeName <System.Boolean>ignoreCase <System.Reflection.BindingFlags>bindingAttr <System.Reflection.Binder>binder <System.Object[]>args <System.Globalization.CultureInfo>culture <System.Object[]>activationAttributes

	
	fn CompileAssemblyFromSource sources dlls:#("System.dll")=
	(
		if (classOf sources == string) do (sources = #(sources))
		-- create compiler
		csharpProvider = dotnetobject "Microsoft.CSharp.CSharpCodeProvider"
		compilerParams = dotnetobject "System.CodeDom.Compiler.CompilerParameters"
		-- add reference to external dlls
		for dll in dlls do ( compilerParams.ReferencedAssemblies.Add(dll) )
		-- set compiler parameters
		compilerParams.GenerateInMemory = true
		compilerParams.GenerateExecutable = false
		-- compile code
		compilerResults = csharpProvider.CompileAssemblyFromSource compilerParams sources
		-- check for errors
		if (compilerResults.Errors.Count == 0) then
		( globalVar = compilerResults.CompiledAssembly; return globalVar )
		else
		(
			format "compilation errors:
"
			for i in 1 to compilerResults.Errors.Count do
				( format "%
" compilerResults.Errors.Item[i-1].ErrorText )
			return false
		)
	)

	fn Create Assembly ClassName args:#() =
	(
		if (Assembly != undefined) do
		(
			if (args.count < 1) then
			( try(return Assembly.CreateInstance className true) catch(return undefined) )
			else
			(
				csBinder = dotNetClass "System.Reflection.Binder"
				csCulture = dotNetClass "System.Globalization.CultureInfo"
				csBinding = dotNetClass "System.Reflection.BindingFlags"
				activationAttributes = dotNetObject "System.Object[]" 0
				try(return Assembly.CreateInstance className true csBinding.CreateInstance csBinder args csCulture.InvariantCulture activationAttributes) catch(return undefined)
			)
		)
	)
	
sources = "using System;
"
sources += "public class testClass
"
sources += "{"
sources += "string name;
"
sources += "public testClass()
"
sources += "{"
sources += "}"
sources += "public testClass(string name)
"
sources += "{"
sources += "this.name = name;"
sources += "}"
sources += "}"

Assembly = CompileAssemblyFromSource sources
testA = create Assembly "testClass"
format "testA:%
" testA
testB = create Assembly "testClass" args:#("blop")
format "testB:%
" testB

ok. the fixed problem is show in red…

Assembly.CreateInstance "testClass" true (dotnetclass "System.Reflection.BindingFlags").CreateInstance (Assembly.GetType "testClass").DefaultBinder #("test") (dotnetclass "System.Globalization.CultureInfo").InvariantCulture #()

you are using in the CreateInstance method the class (“CultureInfo”) where must be an Object

Thanks Denis! Always there to save the day!

I didn’t understand the binder part at first and I hope i will never have to write one.
Didn’t actually understand the use.
When you have a dynamic class or when you don’t know wich type you working with?!
Anyway everything working fine now, just had to convert the args array entering the maxscript function in dotNetObject “object[]”.

what i didn’t understand was in wich case you would have to override default binder.
But since i never had to use invoke menber or invoke method, I’m probably still too “noobish” with c# to get the concept behind.
Sorry for the misunderstanding.