cannot invoke method via reflection...?

[jkersch]

Hi there, i have a trie to invoke a method via reflection from Events.dll (the method that tries to create an instant of the class containing the method also resides in Events.dll) invoking method is : private void execute(string actionname,string[] parameters){ Assembly a = Assembly.LoadFrom("Events.dll"); Type[] ts = a.GetTypes(); Type t=a.GetType("IOW.NET.Events.StartProgram"); MethodInfo runmethod = t.GetMethod("run"); object obj=Activator.CreateInstance(t); runmethod.Invoke(obj,parameters); } Class StartProgram looks like this: namespace IOW.NET.Events { public class StartProgram: Event { public StartProgram(){} public void run(object[] parameters) { //do something } } } My Programs interrupts working when i call runmethod.Invoke(obj,parameters); any ideas where the error is? i just can´t find it. Events.dll is in the right directory, otherwise it would give me an error when i load the assembly from file. i can also read all types from the Assembly-object without problems. thanks for any hints best regards jkersch

[Nick Parker]

jkersch wrote: any ideas where the error is? i just can´t find it. I would suggest you put a check for null values along the way. Also, in particular, there is a overloaded method for creating a MethodInfo object that allows you to specify the BindingFlags via a bit mask, that could be your problem. - Nick Parker
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[Heath Stewart]

What Nick said is the solution to the most likely problem. If run is not public, then you must use the overload with BindingFlags.NonPublic. If it's a static method, then you have to include BindingFlags.Static (perform a bitwise OR with flags). Using just GetMethod(string) uses BindingFlags.Public | BindingFlags.Instance. This posting is provided "AS IS" with no warranties, and confers no rights. Software Design Engineer Developer Division Sustained Engineering Microsoft [My Articles]

[jkersch]

i finally found the error. my (public) run-method wanted to have object[] Myparameters as argument. i wanted to invoke it with methodobject.invoke(classobject,object[] MyParameters). i wrapped the object[]-array my method uses in a second object[] array i.e. methodobject.invoke(classobject,new object[]{object[] MyParameters}); and it worked out of the box, thank´s a lot nevertheless, jkersch